Malicious PDF — malware analysis report

Static analysis result for SHA-256 f802f549e3b0c427…

MALICIOUS

PDF

74.0 KB Created: 2021-02-20 01:36:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce118598dd7684a2f193eb4c136e4944 SHA-1: 7adc1548a0d1e8d228dbc3778be86bae88db7e5a SHA-256: f802f549e3b0c4271e0465977f056d0aef95ea8c2b488791aea7244002a034d6
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, suggesting a link farm or phishing attempt. The presence of embedded JavaScript, though not explicitly detailed in the provided evidence, is a common technique for exploiting PDF vulnerabilities or redirecting users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/strik?utm_term=strategy+that+works+paul+leinwand+pdf
    • https://kakifimetuwojo.weebly.com/uploads/1/3/4/3/134317364/lopikim.pdf
    • http://cocobuka3.xyz/810225018610jvc2.pdf
    • https://tivenudonokokom.weebly.com/uploads/1/3/0/9/130969369/jikaz-lifamusekikeze-rekomigimekuj-xojil.pdf
    • https://muwunijika.weebly.com/uploads/1/3/1/3/131398004/6849073.pdf
    • https://xakowuval.weebly.com/uploads/1/3/5/3/135316831/4854751.pdf
    • https://bewotenugajuvu.weebly.com/uploads/1/3/2/6/132695730/c978b20.pdf
    • https://jafekubu.weebly.com/uploads/1/3/0/8/130814731/sagini_lirep.pdf
    • https://cdn-cms.f-static.net/uploads/4421969/normal_601fdd99eb1ca.pdf
    • http://sellamorem.com/bildircin_yumurtasi_nin_faydalariddf95.pdf
    • https://static.s123-cdn-static.com/uploads/4502817/normal_6005f75133356.pdf
    • http://streichpack.online/19158471665631gu.pdf
    • https://bozobamawokoruv.weebly.com/uploads/1/3/4/3/134350924/9257043.pdf
    • https://fulojexerewo.weebly.com/uploads/1/3/5/3/135345176/dewexeve-buzigu-ruxujuli-nakoworumix.pdf
    • https://static.s123-cdn-static.com/uploads/4418567/normal_600450641f8f1.pdf
    • https://dewazolasimuf.weebly.com/uploads/1/3/1/4/131453174/gowetigepemizugepoke.pdf
    • https://static.s123-cdn-static.com/uploads/4417309/normal_5fe0f5912161d.pdf
    • https://cdn-cms.f-static.net/uploads/4481820/normal_5fd16f3c18181.pdf
    • https://xuniruki.weebly.com/uploads/1/3/0/7/130739043/0acc438c7567521.pdf
    • http://uptodate.site/business_process_modellinguuq9w.pdf
    • https://static.s123-cdn-static.com/uploads/4464850/normal_5fef5b376303d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e295.bin
5230cfea474030261caf6b89edec8798238d1250cdc9b7d2216ff20a7333c751		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE295 5664 bytes
font_01_sfnt_off0000f5f2.bin
1a07aea60741d994ec41f5abb22ccecb26a9146a8012e6963cd8e4c94582a889		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F2 10672 bytes

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