Malicious PDF — malware analysis report

Static analysis result for SHA-256 06b1b94466f853ec…

MALICIOUS

PDF

57.7 KB Created: 2020-11-14 08:14:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: b3cc4708671a65611f6e0b6e35fa40ae SHA-1: d19ee34d6e192dacc2252f843a9d554ef948e4a9 SHA-256: 06b1b94466f853ec599a5f766b2dc57090a1e2680110d08ac5a05dc037ad5049
244 Risk Score

Malware Insights

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

This PDF document is classified as malicious by multiple heuristics and an ML classifier, indicating a phishing or malicious redirector intent. It contains a significant number of embedded URLs, with at least one pointing to known malicious infrastructure. The document body is heavily obfuscated and appears to be non-readable content, further suggesting a malicious purpose rather than legitimate document content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • 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.
  • 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.
  • 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://cctraff.ru/strik?utm_term=ben+yoruldum+hayat+video+indir In PDF document text
    • https://tizemafuniture.weebly.com/uploads/1/3/4/6/134636649/xedowe.pdfIn PDF document text
    • https://guvapokasek.weebly.com/uploads/1/3/4/4/134437462/7430757.pdfIn PDF document text
    • https://ruwadegefanum.weebly.com/uploads/1/3/4/1/134108857/3884ea.pdfIn PDF document text
    • https://pavowojavujide.weebly.com/uploads/1/3/1/3/131398322/5834947.pdfIn PDF document text
    • https://pamarilu.weebly.com/uploads/1/3/4/3/134322341/457724569f7.pdfIn PDF document text
    • https://riwisasivituw.weebly.com/uploads/1/3/1/0/131070703/5657735.pdfIn PDF document text
    • https://dedaruxije.weebly.com/uploads/1/3/4/4/134455514/milexujesavit-bewuxew-sumizo-xelurizopima.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/ruletetunima/revitol_stretch_mark_cream_in_stores.pdfIn PDF document text
    • https://s3.amazonaws.com/bivanud/dead_target_unlimited_gold_apk_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/xezujuxoz/vadiratejizotuwaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37e94af2-e0e0-4e37-8fb1-d325aaf3ea40/fat_monkey_garage.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_off0000a96e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA96E 5100 bytes
SHA-256: 4c9dc9641d5888113f3cfebd7fad76278580a8d070847dd590275ace2d37ae9e
font_01_sfnt_off0000baa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAA0 10004 bytes
SHA-256: c9067fe0d238e307f47200ee8de64a5ec31bbfac9eb336ee8054afde922d60a3

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