Malicious PDF — malware analysis report

Static analysis result for SHA-256 fabc15b75a5d0687…

MALICIOUS

PDF

87.0 KB Created: 2021-07-24 09:44:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 5bac028e4af805d1b67efd27a00324a1 SHA-1: 03f471db0cc694bc8a61a470394434ce82fcf4ce SHA-256: fabc15b75a5d068732ef2196ba2450c64a8f89f942a680eb7e7e5a29b237dbe8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many of which point to compromised websites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the nature of the link farm and the PDF's structure are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 http://konsultacjenaukowe.eu/Upload/file/vulevufumuxum.pdf In PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098f99080959---tusibamamagatedexozakapa.pdfIn PDF document text
    • http://rungruangsteel.com/public/upload/userfiles/files/86682512892.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/7bec2353c92cdc1c716e9795560e0b6b/7993066734.pdfIn PDF document text
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/jneo9h9lp100u5hrhmliruvakd/29083239799.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c5a56e8bfda---vanonuloxawebojuw.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/1608478352d5f1---nezalogob.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/ad377378e2e525585f7c4003bdc542f8/pitezilovuzoxevozu.pdfIn PDF document text
    • https://bustotoronto.com/userfiles/file/87767868717.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609823f9491be---zuwagawozilu.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afae96c672f---bexux.pdfIn PDF document text
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160901bb770c9d---ledexibupokubu.pdfIn PDF document text
    • http://luxcottage.ru/stroykamen/userfiles/file/76275403683.pdfIn PDF document text
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/ad43r8aunuiarf7ql2deqs9lmr/gizajimutomiwur.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/5e4651756d84317299823735c661d164/patazitudenakaresitab.pdfIn PDF document text
    • http://faithartists.com/clients/877397/File/16163859470.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/77dc3b3be757f6faab1e44266d5c86a5/tavuzafeburegaf.pdfIn PDF document text
    • http://pechati-piter.ru/userfiles/file/punadofawufigapuv.pdfIn PDF document text
    • http://serting.eu/userfiles/files/telalafa.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0b0a624bc7---71604326410.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5105679836---sisitimanivemupixaroboj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=what+is+the+30+off+code+for+kohls+todayPDF link annotation
    • 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eec0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC0 17364 bytes
SHA-256: c07e4f14c717c893a1e758175b777c49622b437aba9a91d1bb70c8a0281a592b
font_01_sfnt_off00011c5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C5D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013474.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13474 10960 bytes
SHA-256: 64e9a8f8b398c7f2e10f8c8b86178bb5ee591ed0e3edab430fc689393b75b801

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