Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5d134d39f430d66…

MALICIOUS

PDF

137.1 KB Created: 2020-11-25 03:12:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 0e1a6a8337620077a6b5e3f4790099cf SHA-1: f1583d86dca44ea78236fb0979b9daa4d1b5e761 SHA-256: b5d134d39f430d666210e51f8eaea4fe8711a1cd707df6c639381c942c80045f
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://ggtraff.ru/strik?utm_term=the+seventh+man+haruki+murakami+test In PDF document text
    • https://pidadilux.weebly.com/uploads/1/3/4/6/134666204/jawemepuwiwifisuluf.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/95c657a8-a8db-46f8-8d4a-db613dea5646/zevejopobesukijevope.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39ddb044-13f8-4e92-8251-2156a9e8bcac/vamoninovemab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d415e3f8-18e2-4f32-8511-9c5c202d85e2/95058825873.pdfIn PDF document text
    • https://s3.amazonaws.com/wixamupelinere/tokyo_guidelines_2018_acute_cholecystitis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c3da5ed-89ce-46e4-97c2-c31e142c0148/puzixitapaxojuwizi.pdfIn PDF document text
    • https://s3.amazonaws.com/biwuwukesazef/gesavevebonerapipodekivev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/974b1f34-e91c-4d98-ab6d-b097acaa6464/path_of_exile_best_class_2020_reddit.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/holt_sociology_textbook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e1b7e94-4dd2-4aba-9708-e3adeffe53b7/73739169230.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001d3ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D3BA 1780 bytes
SHA-256: 50d8a4d3f9e35545016693e6ddf8a52c4cc38f8223f106afba950fc56770b84b
font_01_sfnt_off0001dbb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DBB9 4964 bytes
SHA-256: 30f061bfa27556bc7cb01c9b240ca0604a5a110fa3558989480b74e06ba70db1
font_02_sfnt_off0001ec6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EC6F 13000 bytes
SHA-256: 1182b0cc97110319dddefcabb08687eae515943851e21d70f0d88181e586d4be

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