Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a7780f32aaab9ae…

MALICIOUS

PDF

89.6 KB Created: 2021-08-06 21:02:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 51be58970d60a60d08aeec1d7c3a898b SHA-1: b829d0ef4873156f6beaf0f83198c8a190e72454 SHA-256: 2a7780f32aaab9ae69059e56d4d5ae4994ed2ac53419a9de68f50f4ce9afc6ff
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous links, many pointing to compromised WordPress upload directories and disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of these links indicates an attempt to exploit users through deceptive content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160f1bb699c03b---tafofiwevapobedejajifi.pdf In PDF document text
    • https://bandai-k.com/userfiles/file/24130635847.pdfIn PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/8d4af88e26129e2c9fa9de604ec3936e/nabeseg.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/b126c0e4305abbdc3da044e06b96b565/35904459166.pdfIn PDF document text
    • http://avandcie-automation.com/ckfinder/userfiles/files/filejefawadudopetelagiv.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/0jho05b39ca18uvgqb139ct3im/mukagusotumodobed.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/16081ddebe6f4a---medagewudod.pdfIn PDF document text
    • https://aduanaldelvalle.com/userfiles/file/17915133427.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160845fdc70085---79271395111.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160e7bc3c66987---tuwadevurip.pdfIn PDF document text
    • http://hurtglass.pl/upload/file/86766867560.pdfIn PDF document text
    • https://clubsportedinburgh.org/userfiles/files/vavugiwukupad.pdfIn PDF document text
    • https://plasy.com/uploads/file/11404815822.pdfIn PDF document text
    • https://wecareu.net/ckfinder/userfiles/files/muzadetujov.pdfIn PDF document text
    • http://sns-russia.ru/userfiles/file/23988441795.pdfIn PDF document text
    • https://maintogelonline.info/contents//files/dukawale.pdfIn PDF document text
    • http://spiregene.com/image/files/20210630_041537.pdfIn PDF document text
    • https://srp-galabau-rostock.de/wp-content/plugins/super-forms/uploads/php/files/k5paqgf4bcvshc8k1eksv8hhu6/99234355420.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160d74c3fd25ee---59198046105.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160857b8bebce0---12977857137.pdfIn PDF document text
    • http://xn--e42bt3l.net/upfile/files/66158735974.pdfIn PDF document text
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/sh6j5dkpabpq63skjkr9qn2k96/potinokigi.pdfIn PDF document text
    • http://hkbroadwin.com/userfiles/76207194307.pdfIn PDF document text
    • http://daivupaint.com/img-chamthi/files/gebejurijikozisera.pdfIn PDF document text
    • http://sevgineslianaokulu.com/ckfinder/core/connector/php/uploads/files/zogedejevegutez.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=formulas+para+sacar+area+y+perimetro+de+figuras+geometricas+regularesPDF 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_off0000f73b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF73B 17820 bytes
SHA-256: c67aa80028ffd386dd809b875864555de3d6a5e1186ead3f2c95f8478686c56b
font_01_sfnt_off00012464.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12464 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013c7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C7B 11048 bytes
SHA-256: 0b0c6be480649879188d50fb866b0d05c2375d9b82c8e00f19b2fbf277639ec5

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