Malicious PDF — malware analysis report

Static analysis result for SHA-256 180d418662cc962f…

MALICIOUS

PDF

87.3 KB Created: 2021-09-04 21:03:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: d01eee46a0ce00747f3c3ec78c68c8dd SHA-1: f63bd9292d907e9218fee4fd48dde4dfcf84f8a7 SHA-256: 180d418662cc962f5358dc919ed97e476ae9c96e5737be71591360c79061b66a
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous external links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm or phishing lure. The document body is heavily obfuscated and appears to be generated by wkhtmltopdf, providing no readable content to infer a specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://oniceh.ru/uplcv?utm_term=chandrayaan+2+information+in+gujarati+pdf PDF link annotation
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/99a47cc5e6ed6e8336227c75e26151e6/49169392656.pdfIn PDF document text
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/8a3cc27c6acf613f613a6888ad282923/33843205082.pdfIn PDF document text
    • http://buddhavehicle.com/userfiles/file/28456799180.pdfIn PDF document text
    • https://sportsht.com/userfiles/file/zofawawiroguzafekiwezezes.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/ljjbjnk0l5o9leqdllql2ehi60/werozojimimupudulubox.pdfIn PDF document text
    • http://alpha-cp.com/userfiles/file/5655592686.pdfIn PDF document text
    • http://nfrostov.ru/upload/files/30397728679.pdfIn PDF document text
    • http://olgapolyakova.de/files/files/gukujogetuwajaxifabize.pdfIn PDF document text
    • http://allaboutdowney.com/userimages/77526029981.pdfIn PDF document text
    • http://creativeindustries.ru/uploads/userfiles/file/jewoluditogebavetalinobid.pdfIn PDF document text
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160bd6229314ec---tezowujofobowosasob.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/a11a445d4490fbb440ab20cdbddfa0a2/9136278215.pdfIn PDF document text
    • https://cambodiaangkorhomestay.com/userfiles/file/tomazalefusaxar.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610d6a246f7e1---fixaxive.pdfIn PDF document text
    • http://naasschoolofmotoring.ie/fckeditor/userfiles/file/joluvubimesijexosobox.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/525bff2047baa66335152158d7548b39/75784151182.pdfIn PDF document text
    • https://esterkins.de/ckfinder/userfiles/files/zawuwawiv.pdfIn PDF document text
    • http://donkaew-furniture.com/ckfinder/userfiles/files/341943184.pdfIn PDF document text
    • https://egyiksem.hu/uploads/file/rudave.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/a6c0ed43aa0cb516ede36af186c82e6a/gabijuvaw.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/16092f8e114555---34080697467.pdfIn PDF document text
    • https://cortemadera.com/wysiwygfiles/file/lovusanak.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cdf4bc76e61---dutivajekirozutenevoporis.pdfIn PDF document text
    • https://tes-sys.com/uploads/ckfinder/files/20210706/16255088701363.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_off0000ed54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED54 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010566.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10566 18604 bytes
SHA-256: 1147e8f5cd97055990a7a59aab1fb324567c8e12f55e8af55f57f11bd5ffe796
font_02_sfnt_off000135c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135C0 11092 bytes
SHA-256: 7de9b2e9327ab9c29884edca7e0c6b21602d1fd8b3656ee612abc812a5633146

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