Malicious PDF — malware analysis report

Static analysis result for SHA-256 a762b4d5bf838bfc…

MALICIOUS

PDF

75.4 KB Created: 2021-01-06 15:04:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 27b33fe3db935c6422903e36b70b727d SHA-1: 4712727411e6d9f36bc73123101a11cb063fe2f1 SHA-256: a762b4d5bf838bfc8e40c6e18247075ed58c7ae3537fcfac50d8c52d7ed809b6
222 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a lure related to a 'Freedom of information act request police report' and embeds multiple links, one of which, 'https://traffmen.ru/aws?utm_term=freedom+of+information+act+request+police+report', is identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting a link farm or redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to download a second-stage payload or redirect to phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffmen.ru/aws?utm_term=freedom+of+information+act+request+police+report In PDF document text
    • https://cdn.sqhk.co/badaxiloru/jchdgd4/traffic_racer_download_android_1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425728/normal_5faa6ae0677cf.pdfIn PDF document text
    • https://jadufebifov.weebly.com/uploads/1/3/4/6/134627690/lenome-javefo-lokoserosakogit.pdfIn PDF document text
    • https://nomalepizu.weebly.com/uploads/1/3/1/3/131398516/niwituj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413851/normal_5fa59876c1303.pdfIn PDF document text
    • https://waruzakelejabu.weebly.com/uploads/1/3/4/6/134600446/gevonowarow.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/sugosubexez/lasuresibevabinab.pdfIn PDF document text
    • https://s3.amazonaws.com/tajimipojimo/64661362094.pdfIn PDF document text
    • https://s3.amazonaws.com/dozuga/39056161576.pdfIn PDF document text
    • https://s3.amazonaws.com/desekusoxi/kisatidudu.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/vagelujufus.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_off0000e73f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE73F 5384 bytes
SHA-256: 875913569d3c0c4f59550ae8ee4096a60547fe4b97c610595515977ca4b58ae7
font_01_sfnt_off0000f976.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF976 11364 bytes
SHA-256: 03c50c9c6646c8c4d46b9ae17b87f5f6d0c77f4152137c5115237c5f89bb1c47

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