Malicious PDF — malware analysis report

Static analysis result for SHA-256 4141fc2afe12cf84…

MALICIOUS

PDF

65.1 KB Created: 2020-12-02 19:02:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 3cc82940e06e5e4b9cb2c87e284841b7 SHA-1: 16f4374011915ee382ee9fa1e506c07133805711 SHA-256: 4141fc2afe12cf84ef779478716b8b18c1cd6d4408598f633c271d3c1083e0c4
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple embedded links, with one critical heuristic firing indicating it points to known malicious redirector infrastructure. Another critical heuristic identified a link farm, suggesting an attempt to artificially boost search engine rankings or distribute content across many sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

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/strik?utm_term=lab+safety+quiz+answers In PDF document text
    • https://jarofuzaduse.weebly.com/uploads/1/3/4/5/134502270/pupeze.pdfIn PDF document text
    • https://bebejumupetokox.weebly.com/uploads/1/3/4/5/134513190/wovuzavibaxerin.pdfIn PDF document text
    • https://dojeviwenos.weebly.com/uploads/1/3/4/4/134491393/2b6aafdc.pdfIn PDF document text
    • https://fusefediwotedi.weebly.com/uploads/1/3/4/5/134589876/sanerimisiv_tefibizotas.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/xuzed/38682578.pdfIn PDF document text
    • https://s3.amazonaws.com/dejolavubukugeb/86207816594.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94a868e0-568b-4687-b597-a595a55f4ed3/68172788103.pdfIn PDF document text
    • https://s3.amazonaws.com/zarusegibitumet/zipisa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34138b47-4a9e-4318-8fa7-0f9da3e105a3/z71_decals_stickers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05115869-d1b3-4b43-ac72-c4576d544a24/17692104251.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2fb2a40f1034a5cb68ea9/t/5fc772f0b2fa4660c8d51809/1606906621933/8576965228.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02f87b48-fa02-4831-abe6-b8301aedfa2d/vulobi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94264e9d-4e8d-49ef-a564-4733d4df1d3a/suvuxamazegazuji.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_off0000c24d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC24D 5180 bytes
SHA-256: 1b612ddf9a93b8fbf60a47c8def90b28f9281fa726ea076ee730640afdc0c185
font_01_sfnt_off0000d426.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD426 10548 bytes
SHA-256: 97c1b9889445c7fba929273631602b4dcac930e1f1bb5e3115afea07ed017b38

Open this report in the interactive analyzer, or submit your own file for analysis.