Malicious PDF — malware analysis report

Static analysis result for SHA-256 34c16b0fcc7a226b…

MALICIOUS

PDF

255.7 KB Created: 2021-06-28 11:34:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6da9ea8d6cce7297755b9c7900994f4a SHA-1: fef72d5475bb0febd3eeef29aadad0ec059f61f6 SHA-256: 34c16b0fcc7a226b7d22b7c569de3b035e90657714d22a0f4b4816c1b636a953
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan payload. It contains a link farm pointing to compromised WordPress upload storage, suggesting an attempt to host and distribute malicious files. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest it's designed to trick users into downloading further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9766

Heuristics 5

  • 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.
  • 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://geredekombiservisi.com/userfiles/file/pawasijipepijugifobemi.pdf
    • http://applecentervn.com/uploads/image/files/61474156793.pdf
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/f14f9308d0990f80011c066f64d4a1d7/kumafezijapidurut.pdf
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/c6023a98387b07f96619fd216987483e/93716491824.pdf
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/884bc2bc7da6acbb265f6fbcefcd2489/25087428388.pdf
    • http://codemessaging.net/ckfinder/userfiles/files/xubegedexifoguda.pdf
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/160706fe8b0c05---60574252182.pdf
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/6c5add5699b39d6b1f6f14c073bd1a39/11190583519.pdf
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608208ee5a12b---webevopatalutatosimimil.pdf
    • http://afghansolar.com/userfiles/file/rulefuxopetizujelenat.pdf
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/9f0ab79208118e54b73d403b77e049f4/33465240806.pdf
    • https://agrachoff.ru/wp-content/plugins/super-forms/uploads/php/files/14a8dc4d0802fd27b06c54b5f460c453/jakapurusomigetizuti.pdf
    • http://angarakshaksecurity.com/userfiles/file/vejovanazakitanab.pdf
    • http://ferramentabelleggia.it/public/file/nenaje.pdf
    • https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/307abb29a55b60a1bed9d7276acfbdb2/75436391428.pdf
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/678c0732f9795a9220264a29fc44e83f/tulimotepatifuxowalera.pdf
    • http://simonide.org/userfiles/file/guruwudi.pdf
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16087d701e50ac---89626905527.pdf
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a03863ce182---29930264978.pdf
    • https://aljuboori.com/userfiles/files/84852518574.pdf
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/da34077d23272c436793a10682e2e6b8/9066881603.pdf
    • https://alexandrapanayotou.com/web/images/static/file/28536686712.pdf
    • http://teraval.cz/res/file/43912285789.pdf
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/a6339c28f674f49fbf0edcf66cf9db73/16046878622.pdf
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/e05893e09621e10cba1542bba42ffbe4/tabidirexuzoxivolaj.pdf
    • http://10glazsikeyrosa.ru/file/74933604926.pdf
    • http://canhtoanland.com/upload/files/dapegid.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=short+stories+with+biblical+morals+pdf
    • 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_off00038e58.bin
425fb17ce93374cbad2e798336a512f5bcece662d35f18f5800147b431d4f042
pdf-font-stream PDF embedded font (sfnt) at offset 0x38E58 11080 bytes
font_01_sfnt_off0003a804.bin
bb91c2b5db2ee7905ec19d7c3b98e9390cba15ddcf894dc4965a9ab510f0bf99
pdf-font-stream PDF embedded font (sfnt) at offset 0x3A804 18300 bytes
font_02_sfnt_off0003d83e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x3D83E 16792 bytes