Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7cb4395ef235426…

MALICIOUS

PDF

66.6 KB Created: 2021-04-02 06:37:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dfa1d8e4276785b84b6090fbb4e810b8 SHA-1: 662fb3c48a1396a73be474421eb3d560d708da66 SHA-256: d7cb4395ef2354261aeaf9905a9f3da09d49aee172ec509477fc646fd141a933
156 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, characteristic of a link farm or SEO spam campaign, designed to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. The embedded URLs suggest a redirection mechanism to further malicious content.

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://vilenefex.ru/wix?keyword=eddie+bauer+pack+and+play+manual
    • https://nolenefin.weebly.com/uploads/1/3/4/6/134629259/woxegodutefirisab.pdf
    • https://ruxesewafemowur.weebly.com/uploads/1/3/4/7/134761388/pufereked.pdf
    • https://gekibevuzoz.weebly.com/uploads/1/3/4/5/134503907/499e12cfd06355.pdf
    • https://tepupusaf.weebly.com/uploads/1/3/4/5/134585026/fitaroberikata_xowawigid.pdf
    • https://jemaveroker.weebly.com/uploads/1/3/5/3/135391058/6846959.pdf
    • https://goluluvofa.weebly.com/uploads/1/3/2/7/132712214/8b079d.pdf
    • https://cdn.sqhk.co/jujijodop/lkvAMfL/articles_of_confederation_dbq.pdf
    • http://loxokunetuladi.66ghz.com/wasisogidiwotivojo.pdf
    • https://gedibixofesona.weebly.com/uploads/1/3/4/6/134688069/9560603.pdf
    • http://sandiego-podcasts.com/59068282719lgv7l.pdf
    • https://fosizujofaz.weebly.com/uploads/1/3/4/3/134315976/2604561.pdf
    • http://organic100.fun/wuvotelbt8zm.pdf
    • http://itslm.fun/pdf_to_word_toe6zhm.pdf
    • https://cdn.sqhk.co/pesuxitum/KgjggOa/rainbow_snake_game.pdf
    • http://datujizid.iblogger.org/keltron_trivandrum_internship_report.pdf
    • https://lonawapusar.weebly.com/uploads/1/3/0/7/130776864/doguxijikujenipe.pdf
    • http://magonawaneku.22web.org/lease_agreement_california_month_to_month.pdf
    • https://sadavixiji.weebly.com/uploads/1/3/5/3/135333995/delunixix_digowoj_xowilewunekuluz_numojexezuna.pdf
    • https://tusozesazos.weebly.com/uploads/1/3/4/5/134584188/jekow-wazetiwiz.pdf
    • https://xorizetevapaze.weebly.com/uploads/1/3/1/4/131438163/90bc150b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://tuzuvas.rf.gd/dragon_ball_fighterz_android_21_gameplay.pdf
    • 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_off0000c72b.bin
a0e8a864730d418de539fd82f0f16a132d83f1d4cc9a5429f167b58c645bd234		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC72B 5304 bytes
font_01_sfnt_off0000d92b.bin
e802b5429879b6ef64ed72767b67fd6798b9b8d3a2179efc2e7e274192b669f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD92B 10936 bytes

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