Malicious PDF — malware analysis report

Static analysis result for SHA-256 6eff7cd6cdf70259…

MALICIOUS

PDF

71.2 KB Created: 2020-12-22 10:56:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: d17118d99f2b421e654fc5900efb725c SHA-1: 95455c67d68e5d8f51ec26a42f435767df89c291 SHA-256: 6eff7cd6cdf70259312679862811cf8474b05bb289c66308b3261590423dd47b
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious content. It contains a large number of external links, with one pointing to 'https://trafficel.ru/strik?utm_term=bird+life+cycle+preschool', suggesting a phishing or malware distribution attempt. The presence of embedded PDF link farms further supports this. No scripts were extracted, but the PDF structure itself is indicative of malicious intent.

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://trafficel.ru/strik?utm_term=bird+life+cycle+preschool PDF link annotation
    • https://gabesusot.weebly.com/uploads/1/3/4/8/134895193/pokodo-piwenagop.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/7f3650a9-1a87-4132-8c60-0673089616ba/gunapijeruxixivutak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9c9b139-1472-4134-9b5f-1db027e1fa10/zizoligawapenarififipigam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d520fe1f-a7fa-4957-8a7c-bcd684efe2f7/bob_marley_discography_torrent.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02109da0-fde8-4bbe-bdf7-2acb9b95da72/68282004402.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e68cf5ca-d159-4681-af3b-c5608b5db238/chippewa_falls_public_library.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5a21f68612547ed7e37a8/t/5fd1d5a6eeaf2774ac8e81ee/1607587242312/40330119171.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/154ee5a7-4839-4258-a8c7-593f265d964d/moto_g2_xt1078_rom_original.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eed63fc1-1b16-4226-8c43-cd649f7931b9/pexuxifin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d683fb32-1893-4e19-b825-2531930fa11e/1474725210.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac9b6131-dab1-48b6-8793-1705ccd729af/steven_universe_rainbow_quartz_2._0.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1812cb32-15f0-40a3-abda-6488872806e6/pesil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03bf4356-6213-468e-a922-eb2477072dd0/14978312692.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_off0000cd38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD38 4784 bytes
SHA-256: e13a8fca3159a5fd1158ae6b1fa91487eca51eef2d46acfd8381e1449d66a422
font_01_sfnt_off0000dd91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD91 10664 bytes
SHA-256: 76174cfd3cc8f6a2044ac4dc314de11d0bc03837d8cea29d0a62318e2b774072
font_02_sfnt_off00010216.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10216 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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