Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5c5c83c5f2bb99c…

MALICIOUS

PDF

78.9 KB Created: 2021-01-08 00:17:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 06e5495b6750522452a07fd1e0a2bec5 SHA-1: 1b72792042f1b6ca3aff30f6c496063b6313d998 SHA-256: c5c5c83c5f2bb99c2c264dad17dfbc6a8db23fb2684f6b6babb75608d729f5b4
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or SEO spam. While no scripts were explicitly extracted, the PDF structure and embedded URIs point towards malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/123?utm_term=ark+difficulty+offset+for+300+dinos PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4382613/normal_5f9162d16cb88.pdfIn PDF document text
    • https://rowurasivove.weebly.com/uploads/1/3/4/3/134357219/6f45f3c.pdfIn PDF document text
    • https://zuzameponotu.weebly.com/uploads/1/3/1/6/131606203/zibarowiridi.pdfIn PDF document text
    • https://jewojumafolu.weebly.com/uploads/1/3/4/6/134651010/xavobizivofijur_pojugawo.pdfIn PDF document text
    • https://vagewojevibo.weebly.com/uploads/1/3/4/8/134873572/sazev-tiwiti-godomoxibifuwad-lexupedu.pdfIn PDF document text
    • https://mizunawakore.weebly.com/uploads/1/3/1/4/131406356/jazezumu.pdfIn PDF document text
    • https://foxagizak.weebly.com/uploads/1/3/4/3/134332010/zijaridegunonitaw.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
    • https://s3.amazonaws.com/wazorixekunafob/21420692051.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/faea38ed-c026-451a-bf20-a7b305a3a7b4/reading_spark_plugs_for_jetting.pdfIn PDF document text
    • https://s3.amazonaws.com/gazivemon/gereludotuzuxijinugopewe.pdfIn PDF document text
    • https://s3.amazonaws.com/gagagakigibapo/latitude_7490_specs_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2549b7a-6c9e-4831-8ee4-7689a77ad8ae/kibakafivinegine.pdfIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/detoxabotugawu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b6d0ddc-a8c9-4ee9-bdaa-045a4669a6dc/eat_right_for_your_type_free.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_off0000ea09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA09 5148 bytes
SHA-256: cddda8a709a1335dc3f249ccb1a9ba5256c9ba0a0a08fed6c624aa32cc4bf4cf
font_01_sfnt_off0000fba1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBA1 10704 bytes
SHA-256: 59843cecab824e8838152bf11c6cae348dd87d8fb1417043d649c0a3b9b0fe30
font_02_sfnt_off00012037.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12037 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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