Malicious PDF — malware analysis report

Static analysis result for SHA-256 fefc8170c4232909…

MALICIOUS

PDF

88.8 KB Created: 2021-02-16 07:47:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 90d270e37bbab4fd8339a0617ea489f6 SHA-1: 959da17b455e048cfeb9404ad096b2365ca88fc2 SHA-256: fefc8170c42329095d45450958671a7c601e0465a704dade783ccc29a6ad8bd4
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an urgency-based lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://jacksth.ru/wix?keyword=songr+official+site PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4458854/normal_5ff9041934115.pdfIn PDF document text
    • http://chelamela.org/84480961408ed8m.pdfIn PDF document text
    • http://vclean-sale.shop/pumpkin_carving_template_disney6mmpp.pdfIn PDF document text
    • https://cdn.sqhk.co/zesuxetirano/dNnkDEp/motogp_racing_2018_mod_apk_unlimited_money.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389801/normal_60006cd0b20fe.pdfIn PDF document text
    • http://mojuluxemo.22web.org/76480721567.pdfIn PDF document text
    • http://idealslim-italiaofficial.site/669576617852rhyx.pdfIn PDF document text
    • https://cdn.sqhk.co/mudaxomemut/rpghias/30785147659.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369920/normal_602b23b30da9b.pdfIn PDF document text
    • https://riwozetamozu.weebly.com/uploads/1/3/4/3/134331456/38ec090df.pdfIn PDF document text
    • http://sinanomi.22web.org/widirexexulojodaw.pdfIn PDF document text
    • https://lofusomibebez.weebly.com/uploads/1/3/2/7/132740423/6dc5d036ae99a.pdfIn PDF document text
    • https://cdn.sqhk.co/joxezexukub/ygg6dhj/zokojowexabofemonowumep.pdfIn PDF document text
    • http://lady-bug.club/jisabivunibegapolesiboxf34e9.pdfIn PDF document text
    • http://123dutch.com/tutorial_de_arcgis_10._10fz8k.pdfIn PDF document text
    • https://cdn.sqhk.co/fovulifavu/igiMeTy/aim_high_air_force_poster.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://bomajada.epizy.com/antitussive_agents.pdfIn PDF document text
    • http://losikamadan.epizy.com/89618700374.pdfIn PDF document text
    • http://jafimogapevov.rf.gd/chrome_plugin_to_video_from_website.pdfIn PDF document text
    • http://ruxududomaba.epizy.com/pujulizakexaw.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000101d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101D1 4940 bytes
SHA-256: b7b90f3eea31ffb3a4ee9c07468106b9eacbfbc0edeaadd44df77f42f7601e58
font_01_sfnt_off0001129a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1129A 16636 bytes
SHA-256: 7cbf0cf07c68977542ede091d22b75edfce1504dee16153916fd087265435593
font_02_sfnt_off0001460f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1460F 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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