Malicious PDF — malware analysis report

Static analysis result for SHA-256 57e456ace4ae72cc…

MALICIOUS

PDF

94.3 KB Created: 2021-09-05 03:22:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 4d8d03dac62b26ff30ae6960744fa17c SHA-1: f552b21edda33fe6db28eaa2d526a64b66a1e386 SHA-256: 57e456ace4ae72cc9cd772965615992619051712f0c0dc03470090872a98809e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file contains numerous external links, many pointing to compromised WordPress upload directories and disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution through these links. The document body is heavily obfuscated and appears to be generated content rather than user-readable text.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://drafthe.ru/uplcv?utm_term=empiricism+and+the+philosophy+of+mind+pdf PDF link annotation
    • http://esejsc.com/upload/files/fulogokakirebasekiwid.pdfIn PDF document text
    • https://roweryelectra.eu/app/webroot/uploads/file/16233636885463.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/md21m8u044lbinh1e1nca4035i/42952273489.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e8e9c89902d---93106185179.pdfIn PDF document text
    • https://londonvipchauffeur.co.uk/wp-content/plugins/super-forms/uploads/php/files/a0bfd5c64f5120bfb1839cb889836dcd/58839783596.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160e38f2a45907---46115907881.pdfIn PDF document text
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/cb22nne38i3fglplqf5tkhcfu0/45169550179.pdfIn PDF document text
    • https://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/ad5b6b5a50a8b482af1677e595ecb23b/85711361582.pdfIn PDF document text
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa6281ad1e8---wobegekevodir.pdfIn PDF document text
    • https://khabul.mn/mmpa/userfiles/files/fuwejedudak.pdfIn PDF document text
    • http://ivankrivanek.com/userfiles/file/47903114037.pdfIn PDF document text
    • https://thehouseconcert.com/ckfinder/userfiles/files/sopogubufiluzeku.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b73e125332---38408366773.pdfIn PDF document text
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/325b2e3c1484a29dccb2dcbce9e73f8f/wubagikebikodelaw.pdfIn PDF document text
    • http://ajarnveerapong.com/UserFiles/file/kujokiwokuk.pdfIn PDF document text
    • http://kameleonhastanc.hu/files/file/larojixezadogedefoxi.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/1608c4328a1af6---dozezojomixugejewive.pdfIn PDF document text
    • http://southeastern61.com/clients/0/07/0748cf78e2268043913ae7c14e09e996/File/zuzegolekexaguxobi.pdfIn PDF document text
    • http://gdlianyu.com/uploadfiles/file/nepumeduluzixane.pdfIn PDF document text
    • https://nusantarabet4d1.com/contents//files/mitebi.pdfIn PDF document text
    • https://www.alarisusallc.com/wp-content/plugins/super-forms/uploads/php/files/dc1c8d651a0717604975beceed7c9437/86594628296.pdfIn PDF document text
    • http://stilna-ya.com/_userfiles/file/wavurab.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f2ec7e92b4a---45126578853.pdfIn PDF document text
    • https://artasedanasingaraja.com/uploadfck/file/xijix.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001090a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1090A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012121.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12121 10980 bytes
SHA-256: aaef59c7dd75c326c98b974df9212d7b8b7c37d780d463f55fbd9df9f7f51498
font_02_sfnt_off00013a6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A6C 19184 bytes
SHA-256: 92ac85ecebb3a1a0a13de2c1a02b55143fc8a9e591210b2d9ce38e4d17b31fe1

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