Malicious PDF — malware analysis report

Static analysis result for SHA-256 a076187a654ff713…

MALICIOUS

PDF

84.9 KB Created: 2021-07-07 05:09:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5ab94026839303fb5b2a93bda84f7c37 SHA-1: 001cfabe601a82da5106083b8980004a9bb2c55c SHA-256: a076187a654ff713d2a5b23e1634ae345d044e9a039953f86bad924169e3fe25
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and a high number of distinct hosts further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://anthonyvienna.com/sites/default/files/file/2470060128.pdf
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16071602473723---pokijovixapes.pdf
    • http://thesetnews.com/images/fckeditor/file/19872795023.pdf
    • https://tripleccompanies.com/wp-content/plugins/super-forms/uploads/php/files/e85a9d625f8937b199866cdbeb7d284f/xazuziv.pdf
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/bn4iueohqknc1om6p85c357rd5/lofofetus.pdf
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2a4c9d44d0---liromin.pdf
    • https://stallion-international.com/userfiles/file/19265256083.pdf
    • https://cgeminfos.ma/upload/file/45940389645.pdf
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5a5940b778---34250236408.pdf
    • https://weilaimachinery.com/userfiles/files/verikulugo.pdf
    • https://digidatadecolombia.com/wp-content/plugins/super-forms/uploads/php/files/a967e4b8cd3b68f007bea35860bde4fb/jirutotosu.pdf
    • http://erictex.com/ufiles/files/36170914103.pdf
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1609748fe3e62c---zepub.pdf
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/gbd4hqeh2jp6bgneju747oe27k/givonalekowes.pdf
    • http://ciaooo.ru/uploades/userfiles/file/gefapemo.pdf
    • http://mhinflatable.com/upload/file/dolives.pdf
    • http://villa-carlshorst.de/sites/default/files/file/bufubavefukiv.pdf
    • https://hssipm.com/wp-content/plugins/super-forms/uploads/php/files/0087431bf8385b4a9c1d89d44a91aac8/xupotukosipinefabu.pdf
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/69cc07f6be3b8e83ed49a9ffb1f11b5b/lokuran.pdf
    • https://zakarpattya-tour.com/upload/13419943604.pdf
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607d5bcec2600---pebokapebamajejonuzoraz.pdf
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6c3c027b88---41106053092.pdf
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/160df16dd69f29---finokosodapeponurazuv.pdf
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/397384d5c6111cd652c4e1f73165256b/36903877826.pdf
    • https://nolimitscenter.be/peausitive/images/FCKeditor/file/sobonemolexifajiwijatomok.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=direct+associative+and+set+associative+mapping
    • 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_off0000e9aa.bin
6f4c8cd10c7104125f45954ee0955121011d37121346a813e5f93d928d7c3d62
pdf-font-stream PDF embedded font (sfnt) at offset 0xE9AA 10876 bytes
font_01_sfnt_off0001029d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1029D 16792 bytes
font_02_sfnt_off00011aaf.bin
140e10f8be4121f1209bdd7f03493ececb75a94ebb19420c0755a984444cd052
pdf-font-stream PDF embedded font (sfnt) at offset 0x11AAF 16512 bytes