Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3753b711820395c…

MALICIOUS

PDF

76.5 KB Created: 2021-01-01 22:33:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: de609435a6e1794eb6d22c1f58248f5e SHA-1: eddbdd07f5d0e46f631df7cbda156bf5316b4ed5 SHA-256: c3753b711820395cd8e1a3b4676647f1166795c34d8d3811d4ecfa854f959664
214 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or malware distribution attempt. It contains a mass of external links, including one pointing to known malicious redirector infrastructure at `https://gettraff.ru/123?utm_term=shopping+cart+hero+4+hacked+unblocked`. The document body, though heavily obfuscated, contains text related to 'shopping cart hero' and 'hacked unblocked', reinforcing the lure. No scripts were extracted, but the presence of numerous links suggests the primary attack pattern involves redirecting users to malicious sites.

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
  • 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.
  • 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.
  • 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://gettraff.ru/123?utm_term=shopping+cart+hero+4+hacked+unblocked In PDF document text
    • https://jedidaril.weebly.com/uploads/1/3/4/6/134687024/zebupu_xoxipelekuribe_pimutikelita_ruratew.pdfIn PDF document text
    • https://lelebozo.weebly.com/uploads/1/3/4/5/134578107/jovite.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418175/normal_5fb5b6d62dbdb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454670/normal_5fed9a70d608c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478430/normal_5fbb7beebf85f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391009/normal_5fcf968b4b54d.pdfIn PDF document text
    • https://kunolutupevuj.weebly.com/uploads/1/3/4/7/134772201/ruwuraseraji_fapitebepeg_toxipabali.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415537/normal_5fe73166d99dc.pdfIn PDF document text
    • https://likizosuzi.weebly.com/uploads/1/3/4/8/134886942/devetupajo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7401032e-b188-4f3f-a623-d0bcf580f5e6/zevuwujipoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d547660f-5986-458d-8af3-551237b500b5/45873693795.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d11cc9bd-db7b-48b6-9865-f1c78fe994af/54355558559.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb4db061-4e6c-4e9f-a681-0ed86ee9ad95/other_words_for_great_day.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/879b38c0-cf79-49c6-9c56-5268a405f915/duwib.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_off0000ecde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECDE 5552 bytes
SHA-256: f64389b2c898adce0b8b3d23accf966b19ba319764976cb2cfc9dac8f7923638
font_01_sfnt_off0000ffbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFBC 10920 bytes
SHA-256: 61a383147b331e346222fcd94282901b10759029671e79b38e73d391b8737008

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