Malicious PDF — malware analysis report

Static analysis result for SHA-256 a054e6f012d53484…

MALICIOUS

PDF

80.7 KB Created: 2021-03-03 12:17:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 15b89fe83478f38af343683565d2b607 SHA-1: 0480d2047d1bb6efb73e877f540ef6c74a8decdb SHA-256: a054e6f012d534849da54517901cc8aa059004676dcb4f6476b02cdc9fca32a0
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://ponafet.ru/123?utm_term=database+management+toolsets PDF link annotation
    • http://lishop.site/rizoredokjn31.pdfIn PDF document text
    • https://cdn.sqhk.co/dufubimaru/iiqhhjd/korazenuvivozatajikogeku.pdfIn PDF document text
    • https://mulafixi.weebly.com/uploads/1/3/4/3/134317856/duruwa.pdfIn PDF document text
    • https://cdn.sqhk.co/fojevimexu/dicQHWg/62394849859.pdfIn PDF document text
    • https://tuwowezofe.weebly.com/uploads/1/3/0/7/130775341/vinor.pdfIn PDF document text
    • https://sudororurupe.weebly.com/uploads/1/3/4/6/134602833/weroxo.pdfIn PDF document text
    • https://cdn.sqhk.co/naritiba/hjb51gj/sakisif.pdfIn PDF document text
    • http://datingsexchat.site/vuvixetakeruvoripozisixmi36z.pdfIn PDF document text
    • https://tufamivobanode.weebly.com/uploads/1/3/0/8/130814219/2821986.pdfIn PDF document text
    • http://arthromedshop.xyz/xfinity_x1_hidden_features6cnb0.pdfIn PDF document text
    • https://cdn.sqhk.co/pejibuti/chdchgL/64440598557.pdfIn PDF document text
    • https://lerugusenexeke.weebly.com/uploads/1/3/5/3/135317851/2598064.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sogoxutagejuno.atwebpages.com/why_did_the_renaissance_first_began_in_italy.pdfIn PDF document text
    • http://jeborawaleko.atwebpages.com/supersonic_tv_troubleshooting.pdfIn PDF document text
    • http://sivokag.epizy.com/gold_coast_fishing_report_coastwatch.pdfIn PDF document text
    • https://s3.amazonaws.com/ginutu/android_adoptable_storage_app.pdfIn PDF document text
    • http://lupixopuvir.onlinewebshop.net/dewalt_cordless_drill_lowest_price.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_off00010017.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10017 5048 bytes
SHA-256: cb59b4006aa23bf6194bdeb8755f10f8cf0bc0c7c23c96cd27d78d3fa7f0cbe2
font_01_sfnt_off0001113b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1113B 10684 bytes
SHA-256: 2298b0d303c9df9a5f45aace8e83358df35b07053c2e6b57acb59e49fc734275

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