Malicious PDF — malware analysis report

Static analysis result for SHA-256 3086496cc58230ae…

MALICIOUS

PDF

89.4 KB Created: 2021-07-29 21:07:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-17
MD5: f18ccbc2902af2bc364da644a79b8f4f SHA-1: 753d36e72d9fe75b2f7b2c37848196fcf5ea0981 SHA-256: 3086496cc58230aed01d57ca290990464bf40da5db7122f5feae99fcf8b674d1
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised CMS upload directories, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the nature of the link farm and the presence of external URIs suggest the PDF is designed to lure users to malicious sites, potentially for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://nomylo.ru/uplcv?utm_term=what+is+y2mate PDF link annotation
    • https://dutchfansitenetwork.nl/ckfinder/userfiles/files/xopewozilokewolajudamiri.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b233fca544f---75915017529.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cddfbbbdc8---66598275092.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/0db0265ce6916e53f6a72608fffec364/vakowuvelalowugikurip.pdfIn PDF document text
    • http://joltiy.ru/uploads/files/53912111213.pdfIn PDF document text
    • https://rh-h1tapi-turbo.com/contents//files/lazugoxibumej.pdfIn PDF document text
    • https://swagath.co/new/ckfinder/userfiles/files/31718063894.pdfIn PDF document text
    • http://m2m2design.com/userfiles/vanukafadanotusibotesogan.pdfIn PDF document text
    • https://www.hotelamoha.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b5c24d47bc5---12948381098.pdfIn PDF document text
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/gfmait8852it1a0gtj2vdmg0pa/68075466356.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607649aca82c6---18015219486.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa6214ebafb---rilimewekamasurutejagabib.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/7ee9gkioh2en6jmlie1arjhd6b/95029404156.pdfIn PDF document text
    • https://limmaginebistrot.com/file/51171444950.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097e92a28d67---49530058505.pdfIn PDF document text
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/73042a963624f2fb0952c8304f4adccf/96966482125.pdfIn PDF document text
    • http://krevue.cz/UserFiles/File/95712801491.pdfIn PDF document text
    • https://alajuusa.ee/media/contents/file/36100366081.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/9fa67c2c9e084c9cbf349c9010d8b840/9319472557.pdfIn PDF document text
    • http://reelproductionshd.com/userfiles/file/54430221895.pdfIn PDF document text
    • http://fiumevivo.it/userfiles/files/vedevodotowuva.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/f4a7292c52a94eb6167fc795de6c1078/mosejolelaxisaje.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/bgptpi3q7urhcbu0jgidmjuloa/wuvegenigodekijaladumip.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/f9469885c7668cbd0fc8bad7a946083c/54736767866.pdfIn PDF document text
    • http://bandenplaats.nl/cmsimages/file/tenikeku.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e949.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE949 17096 bytes
SHA-256: fde52590b93003ea8df8890ff93a75405e1744b8d0d5505f90c812dc479cd8aa
font_01_sfnt_off000115ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115AE 16204 bytes
SHA-256: 2f37ea1b11ece644fef2f420fc5d5e29c860255d372ec3a711666e2589675489
font_02_sfnt_off00012b60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B60 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00014377.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14377 10232 bytes
SHA-256: af84d719bb54b4c194a5eec26fa970058814b824ac249fbf6d64bc8a61585099

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