Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1ec9b946ba572c3…

MALICIOUS

PDF

74.0 KB Created: 2021-05-27 00:32:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: b0e0acafebade4d5d1410a63b0ff1b85 SHA-1: 5aae63855fa9184560f343ecd0ef067de11a926b SHA-256: a1ec9b946ba572c3aa49056e11ae8614d6168bda0312f1fbb58c68ebf9d9a78c
156 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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://maypoin.ru/strik?utm_term=libro+los+cinco+lenguajes+del+amor+gary+chapman+pdf+descargar PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4421764/normal_6065a7ab54b22.pdfIn PDF document text
    • https://dimegowogox.weebly.com/uploads/1/3/3/9/133999821/fitifaretikalekivep.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427295/normal_5fd92fc7d56c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427519/normal_5fd66f44b36f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389599/normal_6063f02e8b0d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406789/normal_6053376c23458.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365653/normal_600d0c7ef2436.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387590/normal_603f024ba5523.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408463/normal_601143545c2eb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389097/normal_5ff176ba64187.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488822/normal_5fdde88652db1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409244/normal_5fd06a92519b9.pdfIn PDF document text
    • https://lubumona.weebly.com/uploads/1/3/4/6/134648672/vonabefadisujanivini.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501479/normal_605fa4909e7ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425917/normal_600f954aec19f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477637/normal_602fa4815e972.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379241/normal_602a0f462b19f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390081/normal_60469ab6b00f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425256/normal_6057ed923e354.pdfIn 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/b8d3889b-d1b3-46ea-98e3-a4d8c8008ab5/the_black_cat_vocabulary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48b4d7b5-8ce3-43ed-ba0a-63b61fcd61c7/47666692350.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fb4c3cb-522e-45fc-ad1d-1d8a01e4abdd/linama.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f5bd58f-d471-489f-8ffa-8649c8231fa9/25529562088.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_off0000dc87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC87 5828 bytes
SHA-256: fddfb82debc3016cc5762a450fe146b5f8a2cd60e93434b8f4450dd362fd4bcc
font_01_sfnt_off0000f040.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF040 12184 bytes
SHA-256: fa82ff173d28d28fc9bf6ee0990bc3453a049e533ca0a509e1bf09bb452a7bb2

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