Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d4c595be201190e…

MALICIOUS

PDF

81.2 KB Created: 2021-02-22 08:43:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: bc0be196c9ec85725c8661d8873bd742 SHA-1: 944ec305f4b5e48c2e318d77a1dd543078ec7a61 SHA-256: 5d4c595be201190ec8a0935bda8d2cdec7bfee3c81fdff0f7336c469553ad3c2
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are obfuscated or lead to potentially malicious domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external URIs point towards a malicious document designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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.
  • 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://maypoin.ru/wix?keyword=maplestory+dark+knight+bossing+guide PDF link annotation
    • http://runmasten.online/who_does_sookie_end_up_with_gilmorebuolp.pdfIn PDF document text
    • https://cdn.sqhk.co/wakivugex/CgihfdK/duck_hunting_texas_coast_public.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417656/normal_5fd68dc69f843.pdfIn PDF document text
    • http://ru-en.xyz/10189303297y2094.pdfIn PDF document text
    • https://viwoseloza.weebly.com/uploads/1/3/4/8/134861971/aab19588a20e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485440/normal_5feb82b588b37.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403679/normal_5ff43203f0ea2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366009/normal_600496709841e.pdfIn PDF document text
    • http://nadahul.ru/muxomusejusafixuguvozaf72.pdfIn PDF document text
    • http://redit.fun/4785527658696qgb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414864/normal_5ffe9e278f821.pdfIn PDF document text
    • https://cdn.sqhk.co/wijelukifap/gft3heY/sigujaxudomiselupowetase.pdfIn PDF document text
    • https://cdn.sqhk.co/kajipazuto/tGphegh/rodunematifojuz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382620/normal_60307c0bd8317.pdfIn PDF document text
    • http://kesenirevapovid.iblogger.org/netflix_for_smart_tv_android.pdfIn PDF document text
    • http://davilebut.66ghz.com/mawerula.pdfIn PDF document text
    • https://cdn.sqhk.co/dilizilozok/e2Shi4k/jatevekikewefesoruter.pdfIn PDF document text
    • http://joblanc.xyz/arunachal_pradesh_tourism_guidehbjan.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479705/normal_5fd0349a27531.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://koxowasone.epizy.com/jusekiw.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fef8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEF8 5532 bytes
SHA-256: 78d812f5a507805ea83466360569ce3c8f90558d25a291bc55f3425ec451dcf1
font_01_sfnt_off000111cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111CC 11212 bytes
SHA-256: 0b5f3e68480f795341ba5a3a476e6624a13f77918029940a77f790192abf8928

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