Malicious PDF — malware analysis report

Static analysis result for SHA-256 60cdb2634006e86e…

MALICIOUS

PDF

99.5 KB Created: 2021-07-23 11:13:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-23
MD5: 4319b032483dc4c24eae10c209b26173 SHA-1: 86414c8d529e11e17f152ac1f8af7a29a5b9831d SHA-256: 60cdb2634006e86ebbd40c2a732855431cb57b2d2bc7f3e5a49a775f00577cc7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://ks4073.com/file_media/file_image/file/natozodim.pdf In PDF document text
    • https://rarahil.org.np/ckfinder/userfiles/files/tejajufuzobudogojede.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/8a6609c212b14a740156cf6ee5725ab8/mikili.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160d8f6fbcf4d8---93230017682.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/7g4aa9n726a377e9pb70p1upv1/53311005091.pdfIn PDF document text
    • http://candientushinko.com/images/file/5201918425.pdfIn PDF document text
    • http://sochi-vitrazhi.ru/ckfinder/userfiles/files/degunomuxaredib.pdfIn PDF document text
    • https://agrimal.pl/userfiles/file/6119644438.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/16077bfad12d66---gabiwiderep.pdfIn PDF document text
    • http://dangkykinhdoanhkiengiang.com/upload/ck/files/xukonexoxosuda.pdfIn PDF document text
    • https://bonafideonline.com.ar/wp-content/plugins/super-forms/uploads/php/files/9044f41ad5778802e284ad31f36aceef/13891672323.pdfIn PDF document text
    • https://synodradomski.pl/userfiles/file/87360531272.pdfIn PDF document text
    • http://kameleonhastanc.hu/files/file/bazanoruviwifukewu.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607838e09496e---tanogawutaligedilapekup.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/2eff0cfd0562aa877ed6151c1b6626c7/67025826175.pdfIn PDF document text
    • https://tavio.ru/files/file/wurobapunuzazev.pdfIn PDF document text
    • http://daugiavanthienphuoc.com/media/ftp/file/90387037976.pdfIn PDF document text
    • https://www.la-melodie-des-saveurs.fr/ckfinder/userfiles/files/35060676924.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/n49393rv8nbqrm0o64f9m38pfv/busutofukupaso.pdfIn PDF document text
    • https://eventspicer.com/ckfinder/userfiles/files/57475243734.pdfIn PDF document text
    • http://doyen.cc/images/upload/File/gegowamawevelafiz.pdfIn PDF document text
    • http://bajajsports.com/userfiles/file/36666614100.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c2c927dc744---daredezasekiganixifaxala.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=the+past+participle+of+drivePDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00010c12.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x10C12 16604 bytes
SHA-256: 6d4027d6740e08716943a0efd4c4621f4ed3e62c34b6b36d8a4150755f4c36d0
font_00_sfnt_off0000f393.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF393 10640 bytes
SHA-256: 4626c5545677662d5450a435ac5568cf6d6332287dc060c3eda587b1dd439241
font_02_sfnt_off00012360.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12360 3852 bytes
SHA-256: ded913df021a02f952c750907ce7016e7ebceaef9d6134666b82da791180e45a
font_03_sfnt_off00013228.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13228 21620 bytes
SHA-256: 3c04bf9fe5ceda63dbaa1ac612fb88132cb08aba928dd46ff393531b71ef1848
font_04_sfnt_off000166e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x166E0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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