Malicious PDF — malware analysis report

Static analysis result for SHA-256 30c237a179fbd192…

MALICIOUS

PDF

105.3 KB Created: 2021-07-06 07:15:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 100d94455c9c13b0a1a14efe213f3f4a SHA-1: 829cb3dab66e53a130b61a37a458b05fda11e2e3 SHA-256: 30c237a179fbd19208272004e5187ab7cc765cf2039f37133ffc756f021ff285
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall structure and URL analysis point to a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9308

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 https://ikima.fr/uploads/file/bepogisesud.pdf
    • http://cn-polylysine.com/d/files/nikupa.pdf
    • http://aksaxena.com/bpms/includes/fckeditor_uploads/userfiles/file/divutasagad.pdf
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607a8397490fb---51571454414.pdf
    • https://oklogistic.lv/upload/file/jikekajekabu.pdf
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/c97c7ed3ef2b626c54b4575ed86aa490/jajuzitilabexa.pdf
    • http://familiehollander.nl/images/uploadedimages/file/1390548997.pdf
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/16087e8617135a---diwativewikedugiderek.pdf
    • http://jyjwqj.com/uploadfile/file///2021060302583863.pdf
    • https://nilsahost.com/calisma2/files/uploads/butawetivababumugukaf.pdf
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160782af6d95ce---8101657412.pdf
    • https://widepolymers.com/userfiles/file/38919135292.pdf
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c40c2ecd50f---xarunenanejunilowilok.pdf
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/4b9a9d71af9b36ecf112e85d415abc88/rozanojimeb.pdf
    • http://akicgiyim.com/userfiles/file/wumemev.pdf
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/9rn722fo3rrqd73pjksltt2l83/zidebenitoxujekoxeraba.pdf
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/dc1b3ed4e085ba12b368deec73907a65/6261767141.pdf
    • https://minhkygroup.com/luutru/files/dizekuginevibakizesesozoz.pdf
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/4618da3e2bc4ad0a4d21796cd0a5318c/63829994281.pdf
    • https://latework.cz/soubory/54083909519.pdf
    • http://atthaya.com/file_media/file_image/file/75338088793.pdf
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/a54ad7a612d348d24fea73166ed6c2eb/42249030678.pdf
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/d0a8a41d41dbfa739c24dfa6c5a5731d/gomosafajugogidi.pdf
    • http://ibb-online.ru/f/file/nimoxifododejikinafe.pdf
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160b406b3162d2---tasafan.pdf
    • https://memoservicesrl.it/file/filerivixapajironafi.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=along+came+daffy
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off000177ca.bin
d9f5e66163d907df9b2c2f031b8906ab183602eda4757f3e8ef428a9cf922d60
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x177CA 18328 bytes
font_00_sfnt_off0000e1c9.bin
9fa66cb295e95d5d35dc51b4ed5e59ca3dd59923964d294687afed79ad1dfd35
pdf-font-stream PDF embedded font (sfnt) at offset 0xE1C9 10456 bytes
font_01_sfnt_off0000f95a.bin
9c6e9463e60af1a5dfcc51fba2516e2e7273431355d3cf7d79a722ce512158bf
pdf-font-stream PDF embedded font (sfnt) at offset 0xF95A 22280 bytes
font_02_sfnt_off00012f15.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12F15 16792 bytes
font_03_sfnt_off00014723.bin
6b338c49c7896f39fb7bb98c842b05299c0d497110e7ab40877cb850d5cb5e51
pdf-font-stream PDF embedded font (sfnt) at offset 0x14723 16492 bytes