Malicious PDF — malware analysis report

Static analysis result for SHA-256 08e03abb05de5c14…

MALICIOUS

PDF

82.1 KB Created: 2020-12-27 02:32:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: d65db90e93838358b136b87d5ccc0a58 SHA-1: 9953b14cff82f37060bd62d0d81d03876f4dcf14 SHA-256: 08e03abb05de5c148532040d454f14237abd2b1dbb7d218b8e211f87e66da022
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, identified as a 'PDF_SEO_LINK_FARM' heuristic, suggesting a malicious intent to direct users to potentially harmful websites. ClamAV also detected this file as 'Pdf.Phishing.Trojan'. The presence of embedded URLs and the ML classifier's high confidence score further support the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://trafftec.ru/123?utm_term=cancer+man+aquarius+woman+break+up PDF link annotation
    • https://cdn.sqhk.co/xotabuti/U2hjje4/hot_wheels_real_riders_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/jekefebiba/UE38jeD/klondike_solitaire_patience_card_games_online.pdfIn PDF document text
    • https://zoxipunawogedo.weebly.com/uploads/1/3/4/2/134235683/4640769.pdfIn PDF document text
    • https://toripifisesu.weebly.com/uploads/1/3/4/3/134367164/wixatuderire.pdfIn PDF document text
    • https://fikuvigobe.weebly.com/uploads/1/3/4/5/134582673/mojuvalekunewaj-jurukufab-figisexo-jogunakadiw.pdfIn PDF document text
    • https://fikosaxan.weebly.com/uploads/1/3/4/7/134753192/6270673.pdfIn PDF document text
    • https://cdn.sqhk.co/fevivesuxofo/jiHibij/2869698366.pdfIn PDF document text
    • https://cdn.sqhk.co/letowajaf/msicjjb/mega_ramp_stunts_master_speed_boat_racing_games.pdfIn PDF document text
    • https://xaxexapiro.weebly.com/uploads/1/3/1/4/131453807/fapoji.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/a094f6a0-0ae6-4f68-a4b4-2151fc59dc3d/western_arkansas_counseling_guidance_center.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b13ce30-0552-48fa-a8bc-125fec549580/sociology_john_j_macionis_14th_editi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bb66c81-3e9d-40e3-9afa-4fa7d283ed10/28818935835.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b983deda-8b6e-4eb5-b052-25a98b5cee85/63525007089.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4f16416-fcb1-4bbd-9b3a-8c507aea1065/21062854691.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0FB 5372 bytes
SHA-256: 42dd172dc2d9e0b85dba3df5383f9fa47438be8ab072e0d2350ea4fb298504b3
font_01_sfnt_off0001033b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1033B 10204 bytes
SHA-256: 228a50054cc79695348b0ce957a80cfb9c16ba8a1df73a6acd63115916f6b48f
font_02_sfnt_off000125d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125D3 16164 bytes
SHA-256: 4b52fd5da643d9c08cc0a86f773b2f024e3274f3f861dfcac100db1ef433cf06

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