Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5249225c479e2a7…

MALICIOUS

PDF

69.7 KB Created: 2020-12-27 20:15:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: d3e206a2c2f3acb1b196ffb9a749446c SHA-1: 51d1f8e29e27153edce0e44474bcd1c8242fd4ab SHA-256: d5249225c479e2a779402f5aaaf232b678de9144e674d5ec07b65c8421737b1d
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically identified as a phishing trojan by ClamAV. The PDF contains a large number of external links, indicating a link farm designed to redirect users to potentially harmful websites. The presence of embedded URLs and the PDF's structure suggest an attempt to exploit users through deceptive content, likely leading to malware downloads or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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/strik?utm_term=north+star+dodge+on+35 PDF link annotation
    • https://sidutoxa.weebly.com/uploads/1/3/4/8/134886075/rewoxemulawususe.pdfIn PDF document text
    • https://lezunodukulo.weebly.com/uploads/1/3/4/3/134341823/7859194.pdfIn PDF document text
    • https://furamakivagoj.weebly.com/uploads/1/3/0/8/130814247/jirerinozadegitubumi.pdfIn PDF document text
    • https://cdn.sqhk.co/gemadaruvow/d1hh4WO/nova_launcher_prime_apk_2020_gratis.pdfIn PDF document text
    • https://cdn.sqhk.co/faresawuf/gjGjiIc/smith_s_marketplace_north_ogden_jobs.pdfIn PDF document text
    • https://lodoxaravejow.weebly.com/uploads/1/3/4/7/134719504/bd01d9bef9da7c.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/ca1d7d41-7fa2-4616-8079-b66273559411/nofibanofinonedemewut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f4fdebf-fe7c-4b89-a2f2-66ecd837077e/whitney_houston_gifts_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5144b6db-5601-4792-91b4-b8d13a136a70/leteselukaxidugob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c743aece-a25f-48d9-8d4b-63bec865d711/real_wrestling_3d_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/baaa1aff-b44a-49ec-aaa4-c1ecb2b30e2e/bulk_image_downloader_registration_key_free.pdfIn PDF document text
    • https://s3.amazonaws.com/mogipegi/24025043692.pdfIn PDF document text
    • https://s3.amazonaws.com/zikeko/41992188745.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d48d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD48D 5312 bytes
SHA-256: 1f30830264843833ec3dbc6954084a56c32ddfed66cb8758af5e08c2c9e3c5f6
font_01_sfnt_off0000e69d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE69D 10336 bytes
SHA-256: 48168fdf916839ae4c7bdd5b9564f4ee1507bad6a78229632abccdb453242418

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