Malicious PDF — malware analysis report

Static analysis result for SHA-256 508ea3d868168f19…

MALICIOUS

PDF

73.3 KB Created: 2021-01-09 06:07:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: b3385c8a32cee807c6356092d57b4ceb SHA-1: 78464b80f2345233d623a645d9ce55a2ce8a5bc6 SHA-256: 508ea3d868168f192441a59bc403ce4532ff5f672bc437dc9d4a2a04eb69b65d
156 Risk Score

Malware Insights

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

The file is identified as a malicious PDF by multiple heuristics, including ClamAV and an ML classifier. It contains a large number of external links, suggesting a link farm or phishing lure. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic indicate an attempt to direct users to potentially harmful external sites.

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://trafffi.ru/123?utm_term=the+atlantis+gene+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4402032/normal_5fd1d3aadf38a.pdfIn PDF document text
    • https://lenopeseku.weebly.com/uploads/1/3/4/0/134040497/6954157.pdfIn PDF document text
    • https://guboriratuji.weebly.com/uploads/1/3/4/2/134235556/gajunowavibo.pdfIn PDF document text
    • https://cdn.sqhk.co/dekaroku/jjiabsl/best_aca_neo_geo_games_xbox_one.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://uploads.strikinglycdn.com/files/14f1d5da-1c09-415e-88c0-61d199a83512/55405761090.pdfIn PDF document text
    • https://s3.amazonaws.com/pazerogasarinu/wuleguveruzeb.pdfIn PDF document text
    • https://s3.amazonaws.com/ribowexulo/59239539849.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/425a4416-a3c5-41f6-a5ee-ed34ed8391ba/only_hearts_club_wiki.pdfIn PDF document text
    • https://s3.amazonaws.com/gotijejaj/free_template_powerpoint_food.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b417eef9-7009-4872-95b5-a2b839310f8d/hangout_with_yoo_ep_66.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d58cd61-74d2-4fb5-898b-741f6695a71c/tuloliligononimadixuzag.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_off0000d52b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD52B 4832 bytes
SHA-256: c2029d1a92cc296b3305b6c26664f07b545e1370992e8aaff943b82d05a59ac7
font_01_sfnt_off0000e58e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE58E 11104 bytes
SHA-256: e43f86df7639314c80ffbbac7ad6993db984f9392cb999ac2bbe2cc3385d3a68
font_02_sfnt_off00010a94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A94 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

Open this report in the interactive analyzer, or submit your own file for analysis.