Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e6dd835fa356e47…

MALICIOUS

PDF

97.0 KB Created: 2021-08-25 09:06:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: bcf7f4dd6b506e7e954cf101793bd8dc SHA-1: aca56d70e4db323f5dd69e0a1b475d31f86138ac SHA-256: 7e6dd835fa356e476e985640404997857dc1890961f4a68b9f94d3b7bd05d30a
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 0.9781

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://ukdirectremovals.com/wp-content/plugins/super-forms/uploads/php/files/27ee2e36d9c6d768a07a09fbfe6d93c4/kezonusubewe.pdf In PDF document text
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/88a70f9780a28290840c182d1e417901/86421242935.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d42bc858a7c---43138639926.pdfIn PDF document text
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/8inuc0lp2ukfdevuonfufvht32/mojijatepag.pdfIn PDF document text
    • http://amirafouad.com/uploaded_files/file/ziwozatu.pdfIn PDF document text
    • http://beveragesgs.com/userfiles/file/kalisivejuliwitip.pdfIn PDF document text
    • https://ichibaninfotech.com/ckfinder/userfiles/files/vorulunida.pdfIn PDF document text
    • http://ghettaetamionarchitetti.it/userfiles/files/90358541909.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606f33e4d2d41---81448794046.pdfIn PDF document text
    • http://permianhighschool1970.com/clients/e/ef/efee9fcbc667252fc4b649c8163d3733/File/tipezajilatoke.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/3d65321f1e1a3764ee541840890cb7df/dazukawunajewukena.pdfIn PDF document text
    • http://biemmecommerciale.eu/userfiles/files/74932940471.pdfIn PDF document text
    • http://creptiles.dk/userfiles/file/39983125233.pdfIn PDF document text
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/be5bf356fb1174129a96ef85ecaa33d9/towifo.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/f0273d00083c7b17cb5c262892fe7135/11381083818.pdfIn PDF document text
    • http://studiosantese.eu/userfiles/files/penifulowolusuviworufavev.pdfIn PDF document text
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/74469b017b1e6aaf9a8e876384fd3619/jejesevezikeden.pdfIn PDF document text
    • https://riminabda.sk/userfiles/file/23655062783.pdfIn PDF document text
    • http://kstarsmall.net/userfiles/file///45734218984.pdfIn PDF document text
    • http://ymy-tea.tw/upload/files/tukidogideto.pdfIn PDF document text
    • http://africanhairbraidingsalon.com/userfiles/file/kejejexotubikewepodo.pdfIn PDF document text
    • http://ledseoul.com/userData/board/file/39554494571.pdfIn PDF document text
    • https://louvre.lv/res/wysiwyg/file/fufomiw.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/1vcq7mm7k7tqbh4d7argg86mu5/zetonejuvotatumadepan.pdfIn PDF document text
    • http://offerparts.com/upload/files/nomotetexebenojuver.pdfIn PDF document text
    • http://damnoen.com/ckfinder/pho/files/vilenogexobi.pdfIn PDF document text
    • http://sutphinsgermanshepherds.com/clients/21958/File/24430087943.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=you+are+simply+beautiful+quotesPDF 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
font_00_sfnt_off0000e8bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8BB 21444 bytes
SHA-256: e09f811003f07516976e5d665867e0dac61bcac2aae6e70d5fa6acf44b694ca7
font_01_sfnt_off00011e31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E31 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001363e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1363E 2064 bytes
SHA-256: 5221cc56e96b657ff7c15f49bf1fbf1b5222e15cd7ffd769ce953162a3e53832
font_03_sfnt_off00013f78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F78 17276 bytes
SHA-256: 6905240c80e24d201de97013f321b44385f632c49a2013bbf37f07d3d3a0a28a
font_04_sfnt_off0001596b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1596B 10900 bytes
SHA-256: 4b92976dcba8a29729565f60df94d81b244519b16d343baef06f92a0155e4077