Malicious PDF — malware analysis report

Static analysis result for SHA-256 876281d56c48859e…

MALICIOUS

PDF

82.8 KB Created: 2020-11-24 04:01:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 2f46f63265586465d2ae0094ea1dd5b0 SHA-1: dd3193d5254d6c780f6deba7f507244b04622f85 SHA-256: 876281d56c48859ea0b7acd87dd30f755f7f99f9b5f13c7515893c6656eedc6d
186 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 0.9996

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://traffine.ru/123?utm_term=scion+xb+owners+manual PDF link annotation
    • https://luvoseguz.weebly.com/uploads/1/3/4/6/134665560/kogaza.pdfIn PDF document text
    • https://xesaranit.weebly.com/uploads/1/3/2/6/132696194/18b0c.pdfIn PDF document text
    • https://mofalapew.weebly.com/uploads/1/3/4/3/134307760/vogapexu_gagifubipenud_tevutisu_zapunina.pdfIn PDF document text
    • https://remewizefo.weebly.com/uploads/1/3/1/8/131856163/5191581.pdfIn PDF document text
    • https://xoxilorimisutoz.weebly.com/uploads/1/3/4/7/134705863/540bbc4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486984/normal_5fac373387bf2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392650/normal_5fa6083fb48d5.pdfIn PDF document text
    • https://nutofuwinoxa.weebly.com/uploads/1/3/4/7/134719482/1161755.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/mozirolinitaje/4392966293.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c828e12d-5d18-4456-9feb-4c2fe04c9317/83906242647.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8339373-20f1-4177-97f0-88d8f7a34d37/24439999589.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42d3e227-c5b6-4a2f-9954-9d4fb1480468/bawimabafadu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7eee10dd-5fe3-4e42-920f-6f5d9b067438/mijuxonefugakapefa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7620f096-245c-4ed2-8d34-d9a536a9c520/nujivujiwada.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e092.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE092 5148 bytes
SHA-256: ec3b1defc66df0ac1f615733775f3afa6b002d2e2d75bf07acd6c002a486eea6
font_01_sfnt_off0000f1f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1F2 10692 bytes
SHA-256: fda97c027a273af0d69d11088ed829fd42761c5c408da31f52ad4afdcfd6140b
font_02_sfnt_off00011679.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11679 17216 bytes
SHA-256: a3fc4ce79a6d3ffa0c3bacc5031a9edf58fa405a243f479f8b43b56bbe67a3f9
font_03_sfnt_off00012f8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F8C 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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