Malicious PDF — malware analysis report

Static analysis result for SHA-256 86eebaaf9cacfed3…

MALICIOUS

PDF

101.2 KB Created: 2021-06-27 00:03:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0aa2c4df3dfe1f0cf7f73d6c577538e5 SHA-1: 0e578a077fbe4250922e2fe497433617f751e435 SHA-256: 86eebaaf9cacfed3e2221ebe8233a905943a0db810ecd47c8c2bd030613c7171
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malicious content or phish users. The document body is unreadable, but the heuristics indicate a malicious link farm is the primary attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9938

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/ntbs40a349v5sq2s8n8rtjo840/rifupixisejugub.pdf
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606eb008de3c8---vefidiratojezemomonuzeg.pdf
    • http://warraichmeats.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8f74a5489---jopanuj.pdf
    • http://ks4073.com/file_media/file_image/file/45788109702.pdf
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608f71e1105db---27570966610.pdf
    • http://parvazyab.net/basefile/api203/files/gorojuzifalugopowugix.pdf
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160d49112f3d6e---fetofavesejama.pdf
    • http://canhtoanland.com/upload/files/govododadobosa.pdf
    • http://kelvista.lt/images/files/14174447975.pdf
    • http://slsnn.ru/content/files/25454743016.pdf
    • https://polskieplytki.com/wp-content/plugins/super-forms/uploads/php/files/ad0431dd748d6aabe0b22e85c93aa29a/31412174066.pdf
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/160862d406d22c---rimizawugi.pdf
    • https://armagedonspedycja.pl/files/file/15715806439.pdf
    • http://klpa.net/userData/board/file/nafedonatuzizonubipiwo.pdf
    • http://mdsalon.ru/img/lib/file/galogisuxoru.pdf
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160900f54579b3---delujomebejudozafaxebovi.pdf
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/8720bab3bc5b21e7b756b7fce9f393b0/87919059988.pdf
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a969d617454---senebuveguwerezinosom.pdf
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a76448510c---jepekuvanekar.pdf
    • http://mitcostruttori.it/userfiles/files/36453714161.pdf
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160829e50e4074---xexorupejabobu.pdf
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084e744714ba---68815491371.pdf
    • https://cailux.lu/userfiles/files/77062890345.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=professor+wiseman+and+the+man+with+the+yellow+hat
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012663.bin
1fa33740dd698db71f19f72605f0b0b5547c6b27bddee62f6fb6ce480afd127a
pdf-font-stream PDF embedded font (sfnt) at offset 0x12663 18596 bytes
font_01_sfnt_off0001566e.bin
9fb5b4055d3cd10782a1df42a671dd4b2525d695be870dcaea400beea6f0ab1a
pdf-font-stream PDF embedded font (sfnt) at offset 0x1566E 10820 bytes
font_02_sfnt_off00016f4a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x16F4A 16792 bytes