Malicious PDF — malware analysis report

Static analysis result for SHA-256 a23379f1e90b8fde…

MALICIOUS

PDF

74.3 KB Created: 2021-01-11 22:37:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 49174defea59b6b83c3aee9e7193d37c SHA-1: 1186d4668f2d8e8e8ce405a94463f323fc0fdc68 SHA-256: a23379f1e90b8fdeeaab9f8b7a1b842a8c7ce355f83dc6752715ab1221633d8e
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document is identified as malicious by multiple heuristics and a machine learning classifier, specifically flagged for linking to known malicious redirector infrastructure and employing a link farm strategy. The embedded URLs, such as 'https://traffking.ru/aws?utm_term=report+trademark+infringement+etsy', are designed to redirect users to potentially harmful sites. The document's structure and content suggest an attempt to exploit user curiosity or urgency by masquerading as a report, likely leading to a phishing or malware download scenario.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffking.ru/aws?utm_term=report+trademark+infringement+etsy In PDF document text
    • https://kalaxokesipak.weebly.com/uploads/1/3/4/8/134888683/tokewalu.pdfIn PDF document text
    • https://furiraduwonejos.weebly.com/uploads/1/3/4/8/134870793/rofepuvunamevu-xubibu-komuxej-rogugadaxixadux.pdfIn PDF document text
    • https://cdn.sqhk.co/feduvefas/IQKVgd0/georgia_high_school_football_scores_tonight.pdfIn PDF document text
    • https://cdn.sqhk.co/fuwunikuneg/ncfVig2/2024725579.pdfIn PDF document text
    • https://sizuginoten.weebly.com/uploads/1/3/4/4/134490660/gomerenarumezujej.pdfIn PDF document text
    • https://xojujafu.weebly.com/uploads/1/3/4/6/134633902/4133949.pdfIn PDF document text
    • https://nubiduxabegi.weebly.com/uploads/1/3/1/8/131871606/b20b732c.pdfIn PDF document text
    • https://rapexinet.weebly.com/uploads/1/3/4/3/134328854/d4ce016a3e.pdfIn PDF document text
    • https://wafugavewe.weebly.com/uploads/1/3/4/3/134369352/tukerer_wazagu_simiwurokumo.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/turip/jawono.pdfIn PDF document text
    • https://s3.amazonaws.com/tuletivotarupu/army_religious_accommodation_policy_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/pululusodogi/14068946417.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e460.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE460 5504 bytes
SHA-256: d0003ce398c6c60e53479b5ed93b50fbc09018493dce632c29a066f9ccd320ee
font_01_sfnt_off0000f71c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF71C 10444 bytes
SHA-256: 02e518e8e05ba341f5084fdc61c47997731e8adf0e82b5721b797a42e4150720

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