Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6f6dac4c173c1b3…

MALICIOUS

PDF

81.6 KB Created: 2021-03-12 14:24:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 054dabaa4651a7057e0394565954e60e SHA-1: 054c551b60de0534d03cdb68d981405ce06b9a1d SHA-256: c6f6dac4c173c1b39e87b46414851d9e5b509f4765f041281f629f374e7b7c86
214 Risk Score

Malware Insights

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

This PDF file contains a link to a known malicious redirector, masquerading as search results for a celebrity fight. The document also exhibits characteristics of a link farm, with numerous embedded URLs pointing to other PDFs, likely for SEO manipulation or to distribute further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dafemum.ru/wix?keyword=chris+brown+soulja+boy+fight+date In PDF document text
    • https://kelebididoxo.weebly.com/uploads/1/3/2/6/132681806/piribixodesilobas.pdfIn PDF document text
    • https://nokabukewodujam.weebly.com/uploads/1/3/0/9/130969525/7492957.pdfIn PDF document text
    • https://cdn.sqhk.co/vefusujix/iBidgdD/72843893009.pdfIn PDF document text
    • https://cdn.sqhk.co/kugefiruxat/cidicoq/dundee_stars_ice_hockey_players.pdfIn PDF document text
    • https://tonawonigavima.weebly.com/uploads/1/3/5/3/135345065/16c447b.pdfIn PDF document text
    • https://sibibogug.weebly.com/uploads/1/3/5/9/135990875/c8546.pdfIn PDF document text
    • https://fogunovavak.weebly.com/uploads/1/3/2/6/132681822/f380b97ac91.pdfIn PDF document text
    • https://cdn.sqhk.co/rujiwujik/kBOgeii/79053954617.pdfIn PDF document text
    • https://cdn.sqhk.co/ganuniwiku/hjnjert/vapakuluxatewerimodewe.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/xiwevitox/61333522343.pdfIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/rariferugadod.pdfIn PDF document text
    • https://s3.amazonaws.com/ximupuv/53612126216.pdfIn PDF document text
    • https://3568c1c9-c281-4b9a-9ea9-d5d291e0176b.filesusr.com/ugd/e5d8db_5f5adddbcd9b4848a4f2c3cebad29071.pdf?index=trueIn PDF document text
    • https://cae2aa39-5014-47ec-b549-0fed73f36d02.filesusr.com/ugd/c8683e_2bffa314c4464a61ac5f3c019bd45d59.pdf?index=trueIn PDF document text
    • https://75a697d3-84f0-44cf-bab9-f05e37020c50.filesusr.com/ugd/7c3584_1e2b416622044caeb4ce7c2f42c0f9fd.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6170faa-9039-4ae6-b045-d3df78a2a196/73024739416.pdfIn PDF document text
    • https://s3.amazonaws.com/xebuvuwov/91916636895.pdfIn PDF document text
    • https://s3.amazonaws.com/remuv/baxus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce23755b-5351-46f8-aaa0-1959a5993090/life_course_theory_criminology.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f314.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF314 5484 bytes
SHA-256: 3ebdc10964eefe1438448f7f996ab846329eba07ddd7b1276ffa877c9d36e4f7
font_01_sfnt_off000105ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105CA 10784 bytes
SHA-256: c6635145ed1ed92ecfdaff22b8d7968ef9718ba1e415e0b15a377350ecad669a
font_02_sfnt_off00012ac1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AC1 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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