Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d4735857d676599…

MALICIOUS

PDF

71.9 KB Created: 2020-11-30 13:51:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 87d74ad26e0b7310a5a000347fe8940d SHA-1: d90914604f24ae99002e96c1c985ba90dbfde9dd SHA-256: 5d4735857d676599929327d4c947b82abcca8f198f517a39dff527354e74fa5d
164 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. It uses an invoice-themed lure. 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 0.9998

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
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://trafffe.ru/strik?utm_term=x+wing+pilot+helmet+stickers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4474462/normal_5fc02b7a77a4b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369507/normal_5f8ff5e17bdb0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372355/normal_5f8fa4be5773c.pdfIn PDF document text
    • https://nijubalalo.weebly.com/uploads/1/3/1/4/131453980/5977164.pdfIn PDF document text
    • https://migufakugiguxob.weebly.com/uploads/1/3/4/5/134579218/e130e49c352674.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://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf156145a8629dc75ab2b/1606283607410/54663908013.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbfd308239b0722912b0841/t/5fc0e8b1eaf37e3b64bd2901/1606478001264/predicting_products_practice_and_balancing_practice_worksheet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00c98402-7ef5-45be-a550-c2eb83ee4d8c/ap_bio_cell_division_lab_answers.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf114e6d49a06bb563d7d/1606283546859/unleash_your_inner_artist_mini_palette.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf64079c08c7f2b9e373e/1606219328907/sony_kdl_32s3000_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f754b154-e369-46e7-bc21-16e46f2d3de0/jizidel.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc141a05687f52b6b83892d/t/5fc3091feaf37e3b6400944d/1606617376440/ma3110_quiz_2_answers.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0ea1fa8793968640865e0/t/5fc10425f3de5e49b5886339/1606485029733/24305943714.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_off0000c35b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC35B 5060 bytes
SHA-256: 29d96507991d949314571f7099fd3818204d531e81b8ba32e574ac9e370e288b
font_01_sfnt_off0000d46b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD46B 15532 bytes
SHA-256: 235d840e3a10183551ddafc3aecbef56897037bc95e42cbb34c1bcb11f150824
font_02_sfnt_off000104df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104DF 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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