Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a2eebfd45eb035c…

MALICIOUS

PDF

125.6 KB Created: 2021-07-01 00:52:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 04da8f9cf647a32f3178a8ab00689e54 SHA-1: 199acb3f7a4274ae9717223cae926cea3ccaa0a8 SHA-256: 2a2eebfd45eb035c4f69e27745f848b15444953c0087790214cd181bdcb1678e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1190 Exploit Public-Facing Application

This PDF is classified as malicious by ML models and ClamAV, indicating it's likely a phishing or trojan delivery mechanism. The heuristics reveal it functions as a link farm, hosting numerous PDFs on compromised CMS upload directories, suggesting an attempt to exploit public-facing applications for distribution. The presence of multiple distinct hosts and disposable hosting patterns further supports its role in a malicious distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9921

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://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/pci7lkt4664ov5d3jd8cpkj7es/26874763110.pdf
    • https://lasvegasrebath.com/wp-content/plugins/super-forms/uploads/php/files/4074da17ad1c16ca1137a8612f0b8461/levijikakepavu.pdf
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/160790d65d0809---35951432435.pdf
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/3lfc592t0251us0gu85i2lrrlc/68260507001.pdf
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/hgff9gudl64alt7v0hvphu758r/silufirodo.pdf
    • http://finproekt-msk.ru/userfiles/file/29255064962.pdf
    • http://poiskvod.ru/images/file/80411637804.pdf
    • https://pinpointfeedtech.com/ckfinder/userfiles/files/79845138462.pdf
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/2e3d06f16377962bd668641518c12e40/zipubaxizugom.pdf
    • https://beautyyaurient.com/editor_upload/file/96081559010.pdf
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c8856a1870e---54768749743.pdf
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a9c51056304---mezofikulidovutepo.pdf
    • http://aksaxena.com/bpms/includes/fckeditor_uploads/userfiles/file/81722239452.pdf
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/74c4053e9c83d3098604c8383aff7781/tavukowalelisunofobakupov.pdf
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9eccb4ba8---17606575660.pdf
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/2ce3afff43656ad74d7b5fa4d2a9e817/zujim.pdf
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/160795439e31cb---dugevulaxum.pdf
    • http://seoulgreeter.com/userData/board/file/jezatuxas.pdf
    • http://bukharaatlanta.com/sites/default/files/file/50348234710.pdf
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/pa9ttjk31a9os7fogeelb0irp1/93102734958.pdf
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160923c8735cad---62800024243.pdf
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/4b52fhsr14hd7di5gh33d3mc27/28251909117.pdf
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608cbda89e66c---juxifaxatuw.pdf
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609082832d055---dorizefiwixe.pdf
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/6918960669.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=sickle+cell+hypokalemia
    • 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_off00018927.bin
76372c2517e2ca19a844cb5703fd6a65d855f8e533d27844bc2ad845e773c07c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18927 18356 bytes
font_01_sfnt_off0001b928.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B928 16792 bytes
font_02_sfnt_off0001d13f.bin
8e5c746f32cdec77ad260fda0c18f74c74ca7d0efcc7a3128346df34983b82ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1D13F 10452 bytes

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