Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba6e7d810dd2a991…

MALICIOUS

PDF

86.8 KB Created: 2021-07-06 16:56:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: efa9c0f8e83b3e762d10552f2e815d3c SHA-1: a202dda2b1f8dc19b141578a03a5fd929dbe559b SHA-256: ba6e7d810dd2a99169142d7ba7de1c8ed92c8b6fa2edaa4a55d31fca74173eda
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised CMS upload directories and disposable hosting, indicating a link farm designed to distribute malicious content or phish users. No scripts were extracted, but the PDF structure and URL analysis strongly suggest a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 https://elsa-daulte.com/ckfinder/userfiles/files/rifogaxekanakonofib.pdf
    • https://cdpu.net/wp-content/plugins/super-forms/uploads/php/files/ca0c6be98ca371f13bdda28d641996cc/96372272299.pdf
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/16080489910075---40865234365.pdf
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/f55c90ef338b9648a054ce5415beac91/tizuputuxomonasa.pdf
    • https://ccaquebec.com/userupload/files/gelonisutumes.pdf
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/16074362ec66c5---zonekevofojozotugaxala.pdf
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160777bd6d0279---7790621478.pdf
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/ioe425pahf2kt2hbnmhutflj1l/lifoxikezotumebaxalaruji.pdf
    • http://bangiyaparishadtoronto.ca/bpt/editor/uploadfiles/dogamunapatelefa.pdf
    • http://delve-cr.com/uploads/vakizubexudidetar.pdf
    • http://juniorsmagazine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608692a61a7c7---muwuneluletenurijim.pdf
    • https://yellowstonewildlife.com/vomuwozorijunaxowuwarer.pdf
    • http://talani.nl/userfiles/image/file/vajegumuzomesa.pdf
    • https://medsplus.us/admin/images/file/satulavib.pdf
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/j914siflhcdlt6btiuv7cu0ne4/41205957275.pdf
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608371bfb20d4---7911945732.pdf
    • https://nepalimodelagency.com/userfiles/file/14895939416.pdf
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/qmj51rsckhjipob3smtmj1oq4l/6081742476.pdf
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f55943d96a---totojevododisebik.pdf
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce4a81dfe55---54641798713.pdf
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071230a9bef3---25535581224.pdf
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c71846751c8---56661749882.pdf
    • https://radmangroup-ye.com/rgfiles/file/57193109143.pdf
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160d7226c43270---32967469918.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=the+100+books+you+should+read
    • 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_off0000f0aa.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF0AA 16792 bytes
font_01_sfnt_off000108bc.bin
6afe3df5638a2b47007437d8fc211edd71be9df6413e6a2078e47c380c08eea8
pdf-font-stream PDF embedded font (sfnt) at offset 0x108BC 17136 bytes
font_02_sfnt_off0001357e.bin
fe03d908a8d9e155080a6bb52b44effd044ebcc04e4799bd1037b8b0a45982ea
pdf-font-stream PDF embedded font (sfnt) at offset 0x1357E 10632 bytes