Malicious PDF — malware analysis report

Static analysis result for SHA-256 037fdb65ea6e4acb…

MALICIOUS

PDF

74.8 KB Created: 2021-02-28 19:25:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 65ecb7584af6f710418467b4a747a37f SHA-1: ec400e45cf1917a821cb79854d631d111e6fa811 SHA-256: 037fdb65ea6e4acbbc6def7cfe9c6888154bab002aa35c80072c69dfb4a0e820
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 point to other PDFs, suggesting a link farm or SEO manipulation tactic. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URLs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://golowaki.ru/strik?utm_term=what+is+the+best+offensive+playbook+in+madden+20 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4377407/normal_6032a6582b5f8.pdfIn PDF document text
    • http://amaryllis.space/xumuwomunujereljo61d.pdfIn PDF document text
    • https://juxipidupe.weebly.com/uploads/1/3/4/6/134694928/wikuwisa-kasugafikipona-xeruv-sebutugasemozu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486061/normal_603bcee186f26.pdfIn PDF document text
    • https://jujamepusa.weebly.com/uploads/1/3/2/8/132815903/sofodovot.pdfIn PDF document text
    • https://nojefawagalubab.weebly.com/uploads/1/3/4/2/134266261/a1c01a.pdfIn PDF document text
    • http://familyit.pro/alfie_kohn_puni_par_des_rcompensesj6oyr.pdfIn PDF document text
    • https://voganesabif.weebly.com/uploads/1/3/1/1/131163538/guvep.pdfIn PDF document text
    • https://vibusipapomokij.weebly.com/uploads/1/3/2/6/132682711/1420651.pdfIn PDF document text
    • https://pefisidedufe.weebly.com/uploads/1/3/4/9/134902532/1616863.pdfIn PDF document text
    • https://tugixafebav.weebly.com/uploads/1/3/2/6/132681891/8bca6245.pdfIn PDF document text
    • https://jipuziloki.weebly.com/uploads/1/3/2/6/132695969/5ee9dbd482c.pdfIn PDF document text
    • http://believes.space/westbury_aluminum_railing_installation_instructions4o3yh.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/rewepalazamiso/mukodetubofuweb.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawe/android_tv_box_tx8_max.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/how_to_get_ham_radio_license_online.pdfIn PDF document text
    • https://s3.amazonaws.com/voxulija/36973116541.pdfIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/answerable_to_meaning_in_urdu.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_off0000e68b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE68B 5840 bytes
SHA-256: ea2e11acf30287824ccd6e93712ef8dc1b07178f26f509c2641c8125a6ebd86d
font_01_sfnt_off0000fa5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA5E 10528 bytes
SHA-256: 945e3d29d7aa6a62184cb994f51f71eaf352704c6ef165aa5e74ebcc4d6ec5f0

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