Malicious PDF — malware analysis report

Static analysis result for SHA-256 db118fe0d8b37e1b…

MALICIOUS

PDF

84.4 KB Created: 2021-09-01 12:28:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2814aea9eca8991c987bdc0d6f4ccf96 SHA-1: 78d57847bd60c7a45e1e2c42445211ca4d398a82 SHA-256: db118fe0d8b37e1b40905e84799dc094768a9ff8e43c8b464c544ac0c276073b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier with high confidence. It contains numerous links to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate this file is part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/223892f413893e83e41519cee8d716bf/sepivazazovivurozimus.pdf
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077604ca9b98---97425392432.pdf
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160f7988284c34---25379514672.pdf
    • https://anmoul.com/userfiles/file/10731983159.pdf
    • http://stonestudio.pl/files/upload/file/matupuzumixigozazu.pdf
    • http://fantalife.nl/userfiles/file/64172181616.pdf
    • https://zzwgjx.com/d/files/kiminuxibusodotajijix.pdf
    • https://istanajp2.com/contents//files/sekimuwenavadi.pdf
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/3teokpnvh352gh87seri0b4ko0/38652248285.pdf
    • http://am-assets.com/aom/magnolia/userfiles/file/xotifugapevopuwu.pdf
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/de30037e311a99f9d7b9d7124ee9704a/zazetapibolojobikamafogil.pdf
    • http://knshzj.com/CKEdit/upload/files/7977784140.pdf
    • https://ludifrance.fr/userfiles/file/dovifiju.pdf
    • http://rzn-house.ru/upload/file/95132020234.pdf
    • http://fs-select.com/images/blog/file/25957699576.pdf
    • http://architettorobertafasola.eu/userfiles/files/45927608117.pdf
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/5640cf167e2f65434e71eca3b7773f66/66706289981.pdf
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/mhuh4t2822ueg15p47386sc1qa/jalusuvonafudexul.pdf
    • https://fullmagicweekend.com/ckfinder/userfiles/files/bukepemom.pdf
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be8248b0aa0---vudibetalorezupuzolabosol.pdf
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092015d5798d---xefusazoseri.pdf
    • https://electroagro.es/pub/files/94546395507.pdf
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16083338825a53---82540036336.pdf
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8eee8c35a0---29733634276.pdf
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160757c51374cb---sudonibilisubomuxeruwusi.pdf
    • https://makenie.com/upload/files/92253444628.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=too+many+login+failures+steam
    • 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_off0000df75.bin
d09d1114c0c5b95c2198bfc0e774c436971d41a1bd1c4c543853fbf4f146b06d
pdf-font-stream PDF embedded font (sfnt) at offset 0xDF75 18920 bytes
font_01_sfnt_off00011097.bin
90be69df96275127e191eb7ef0caa84970b339f52d9503662d6d00d6f3ee8c13
pdf-font-stream PDF embedded font (sfnt) at offset 0x11097 10732 bytes
font_02_sfnt_off00012945.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12945 16792 bytes