Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9851a72d6bdfa8a…

MALICIOUS

PDF

85.2 KB Created: 2021-03-02 18:30:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 1bd7a038d4985b1a3e1693fd0a57a14d SHA-1: 70ce3bb12280292505cc7120d25a6b43a4d262bf SHA-256: c9851a72d6bdfa8aae36e860cd769fd97ac35a606c9689f2917345d7aaf7eba4
154 Risk Score

Malware Insights

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

The PDF contains embedded URLs that redirect to malicious domains, as indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The ML classifier and ClamAV also flagged this file as malicious, suggesting it's a phishing attempt disguised as a product manual. No scripts were extracted, but the presence of malicious links strongly indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://yafferge.ru/strik?utm_term=spt+wa-1420e+portable+air+conditioner+14000+btu+manual In PDF document text
    • http://nubolats.xyz/6038532068lmv2z.pdfIn PDF document text
    • http://mebelrostov.ru/enel_spa_annual_report_2014v8w11.pdfIn PDF document text
    • http://dimax.website/voriponogolug4pti.pdfIn PDF document text
    • http://smotrikino.fun/xuropukanonawifetexineno4xdbh.pdfIn PDF document text
    • http://subbellassecret.com/59605474712dputk.pdfIn PDF document text
    • http://pochta-24.cc/nalarojapijimoluw3mgif.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456398/normal_5ff899913ab06.pdfIn PDF document text
    • http://labincom-med.ru/gerund_participle_and_infinitive_phrases_worksheete1378.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379241/normal_5fe04fed0d5f2.pdfIn PDF document text
    • http://drive4mclaneeffingham.com/libro_los_axiomas_de_zurich32hdt.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411512/normal_5fda4f4861ce8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381534/normal_60143e1b3543c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369908/normal_5fcad6c479dcb.pdfIn PDF document text
    • http://nominasacra.ru/bdo_imperial_fish_trader_locationszcu4x.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489713/normal_602f1866c859b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489976/normal_5fe5d6c1b356c.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
    • https://s3.amazonaws.com/ximupuv/garfield_2004_movie_tamil_dubbed.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_off0000fecc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFECC 5704 bytes
SHA-256: 2307502ab8a376b81039132dc8a82d166403266d4a8cffda7beb93f638bd58a6
font_01_sfnt_off00011227.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11227 11580 bytes
SHA-256: 648d7102695243256ef1a473babef3448a11f6c98103e0d26ea12e41e2843231
font_02_sfnt_off00013921.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13921 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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