Malicious PDF — malware analysis report

Static analysis result for SHA-256 eda42dc1f6fc27f3…

MALICIOUS

PDF

83.6 KB Created: 2021-07-01 19:22:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 921eae7c9b99265ffd9f372efab25e15 SHA-1: c6e33d5dccbf7296d6be47d171eac186df72ee8b SHA-256: eda42dc1f6fc27f3a62ab9a01b9f27533cc1216413f7e40228185a7a65d03f5e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous URLs structured as a link farm, with many pointing to compromised CMS uploads, suggesting an attempt to lure users to external sites. The presence of PDF-specific heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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://nomylo.ru/uplcv?utm_term=pokemon+heart+gold+rom+download+for+android PDF link annotation
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/d1f62b8c081b0941250c4d54813fbfed/69449391797.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a244db70d37---jusapunopamofipaxafu.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/5ece0017acdd1c0fe78f2099d671c366/76177865287.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abc847d1cdd---dosozitapopikebajizusalap.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608566c787731---fazevijetugetezuritepoxok.pdfIn PDF document text
    • https://jpjplumbingandheating.com/FCKeditor/file/76901198140.pdfIn PDF document text
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/3e1076f51eb7580998e26d5bd32f36b8/natekudidulugeguv.pdfIn PDF document text
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/m387ifgqjl8s5fdkgefq88ad0t/viwozefug.pdfIn PDF document text
    • https://bodwellassociates.com/wp-content/plugins/super-forms/uploads/php/files/c1af955f9896315f2ca0b198b8995ab5/50184726569.pdfIn PDF document text
    • https://dineflon.com//files/diworedozevoguzab.pdfIn PDF document text
    • http://immobiliareborghi.com/userfiles/files/15508613787.pdfIn PDF document text
    • http://ctyrkolky-gamax.cz/data/dokumenty/gapudoxenadoso.pdfIn PDF document text
    • https://mfdesign.hu/files/file/lexuviluvudanudo.pdfIn PDF document text
    • https://lolakarimova.uz/ckfinder/userfiles/files/39246551527.pdfIn PDF document text
    • http://stellamaris.cz/userfiles/pererejozuxure.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/usfreipek6mnp1tjr68kfsc4rc/vuwudogax.pdfIn PDF document text
    • http://africa-emergence2019.com/userfiles/file/kikefosikifuzijej.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfb4e91e16c---padodozubumujulezegux.pdfIn PDF document text
    • https://singaporenotarypublic.com/wp-content/plugins/super-forms/uploads/php/files/fdcd5be22c5dca5240373a86016a8790/1536809694.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160afcc23a136b---91537590008.pdfIn PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160a944d7614cd---lariwiguturorubuzazefen.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b7e3e35166f---wubozu.pdfIn PDF document text
    • https://kamarkosong.com/contents//files/28478746129.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/803409f5c69dd01942d719151ed7a847/mexidemum.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_off0000d4e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4E2 28260 bytes
SHA-256: 20dbe7f22da57d88e8a9382f6318d5c221d61714d0fcd572b4d6d83387c8e2b6
font_01_sfnt_off00010e48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E48 10812 bytes
SHA-256: 7074791d158fad0365818250dc22d7482d2dce2e5544764e232f58e97f306e77
font_02_sfnt_off000126db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126DB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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