Malicious PDF — malware analysis report

Static analysis result for SHA-256 27347a095eaab957…

MALICIOUS

PDF

95.3 KB Created: 2021-06-30 08:49:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: e2de414bcbb05e0a378d16a17c414610 SHA-1: 9efc8d4cedfe4a6ba970993deb95f62a05e35146 SHA-256: 27347a095eaab957b980703f88149d0763a7393932d1d0a6745c0946c1dd6301
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous external links, many pointing to compromised WordPress upload directories, suggesting a link farm designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, and the document body was unreadable, but the heuristic findings are sufficient to assess the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9866

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://smidgel.ru/uplcv?utm_term=after+we+collided+full+free+movie PDF link annotation
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf41996c851---48400622633.pdfIn PDF document text
    • https://habrit.tw/ckfinder/userfiles/files/vozulupolotijekisuwus.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160984f315d910---zekupelusisobamumu.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/ec4p4ppbarp76fto3ef1ukhrsb/kigukenedaririvotojuru.pdfIn PDF document text
    • https://irisapp.cn/uploadfiles/fckeditor/20210515/file/16210916843254.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608bc60982414---15953404709.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/8db4a7f77880c3556586829ad1b61e96/wekefofiniwuvi.pdfIn PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/0fed5fa899d9655c577ac0440a5b377a/87970564123.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/6c9a3e25d43253fb5d3896c677d626ce/wiwalominoz.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/160add1fc909b9---9876811206.pdfIn PDF document text
    • http://townofwinslowin.com/flash/townofwinslowin.com/file/95178722746.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090ee72c22d1---xegolax.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/b660c75c29557202d8cc189e18d7a7b6/60007689828.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/f0a371c4b0c7a4759b53403b3c652f52/75358585338.pdfIn PDF document text
    • https://fastcomputer.vn/wp-content/plugins/super-forms/uploads/php/files/417678ec2d14b1af3ecd412dfd7e8887/66700873885.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/g9qajosuigphu7mqho7gg8k1aj/4185944751.pdfIn PDF document text
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/1609c2fb15727d---49352271860.pdfIn PDF document text
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/c6ab1a551db28192a5670b8bae8349c9/juladibep.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/e49i786qenbk9mo2ijq59irg62/11777884067.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075ec938b2c7---wozire.pdfIn PDF document text
    • http://brenno-tojestto.pl/userfiles/file/81807360233.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606caa3ba633f---900917932.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/4dca75501d0e839da194cf1aa3c1ea72/zilezodesivebunofatavi.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF40 23852 bytes
SHA-256: 4dc77f3972926dd4da67b312fa429fc19878811073127224adef8cde71abf8f0
font_01_sfnt_off00011dbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DBC 16612 bytes
SHA-256: 56b781e600361c2b105764234937d1717a1f33f92ecd843cedf410e78569ef7e
font_02_sfnt_off0001351f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1351F 2248 bytes
SHA-256: 66561d23f2eb1695a39bb9f88b80d9683298b042bd99b179776941a2f3878adb
font_03_sfnt_off00013f07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F07 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_04_sfnt_off0001571e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1571E 10436 bytes
SHA-256: 2020bfdadef065f8ab3a40b6d570b71c224b2503999e44655e57231f44aa00f3

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