Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f2a63953448b978…

MALICIOUS

PDF

88.9 KB Created: 2021-01-11 20:25:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: eca8d3f88cbd82e7606f1f56f3c2db85 SHA-1: 730c441c121119f24591b2abef8b056d1173240e SHA-256: 7f2a63953448b9780b7eecf6adcee9589d54544510bd207e66e28778796f69c7
244 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links pointing to various websites, many hosted on disposable domains or link farms. The heuristic firings indicate it's a malicious redirector and link farm, likely designed to drive traffic to malicious sites or engage in phishing. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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://ggtraff.ru/123?utm_term=porta+power+ram+20+ton In PDF document text
    • https://bixikobitil.weebly.com/uploads/1/3/4/5/134525497/f2e14.pdfIn PDF document text
    • https://gawokuvaz.weebly.com/uploads/1/3/4/6/134656265/dinewebigikiraviw.pdfIn PDF document text
    • https://niritopep.weebly.com/uploads/1/3/4/6/134634222/vosalana-potaziwute-dusewive.pdfIn PDF document text
    • https://cdn.sqhk.co/ronofumito/NjbAD9q/fejusavalasasugawitoxida.pdfIn PDF document text
    • https://gotenalonas.weebly.com/uploads/1/3/4/3/134372716/wejojabubipegimo.pdfIn PDF document text
    • https://mesofuxemivoge.weebly.com/uploads/1/3/1/3/131398024/butuwisopazora.pdfIn PDF document text
    • https://cdn.sqhk.co/xoradofexul/jSuhaFw/.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487192/normal_5fe4d24bb92c7.pdfIn PDF document text
    • https://gejatovuri.weebly.com/uploads/1/3/1/4/131406669/xuxozodorozus_bulanafavita.pdfIn PDF document text
    • https://cdn.sqhk.co/didatife/j2rT7gi/dibofojotutamu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502188/normal_5fd65d7bafdbd.pdfIn PDF document text
    • https://riseriku.weebly.com/uploads/1/3/4/5/134585500/9b6b4f083979581.pdfIn PDF document text
    • https://cdn.sqhk.co/kedilexele/bhggcHw/37110351545.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
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010a5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A5F 4864 bytes
SHA-256: 4fbd766a9bb8fed8be294d88f780f4389972fd83b60ff9d66e8deb7ff9d97898
font_01_sfnt_off00011ac8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AC8 14316 bytes
SHA-256: 282f6b88c5075a848c262bc8ac52720f7c73419f2c2cb7cfa807a9508c749cf8
font_02_sfnt_off00014891.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14891 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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