Malicious PDF — malware analysis report

Static analysis result for SHA-256 249c7fb0ef78340d…

MALICIOUS

PDF

67.4 KB Created: 2020-11-17 08:35:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 7a27ce9fbc06b233aa594860b096f205 SHA-1: d126d9a5693dde78231332ffd6a40664c5488ebc SHA-256: 249c7fb0ef78340d9081bf7bbc3bc34155d045701f66f63a47f281d52733513e
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • 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://traffking.ru/123?utm_term=physical+science+chapter+5+study+guide+answer+key PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4413862/normal_5fa38070580f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468553/normal_5fb338e366d4c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365660/normal_5f87484e3da0d.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/vunud.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/845ef6d3-d8bf-4514-a4d6-0fbed7d3c786/17481962068.pdfIn PDF document text
    • https://s3.amazonaws.com/tipakalif/78073778879.pdfIn PDF document text
    • https://s3.amazonaws.com/vitelitubovuluj/small_split_and_merge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3dfb1cc0-3e9b-4be5-8c7f-d248749b2253/dilations_not_centered_at_the_origin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53d6e403-b816-40c8-a02e-f25d617fc47b/third_grade_math_timed_tests.pdfIn PDF document text
    • https://s3.amazonaws.com/levovod/wugazexija.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2b0420b-98be-4607-8488-72da6fb28f87/42935310945.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6c7343a-90ca-4d23-9517-167cfc74f1b7/ppd_affiliate_programs.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/lippincotts_review_for_medical-surgical_nursing_certification.pdfIn PDF document text
    • https://s3.amazonaws.com/ninazarila/las_vegas_raiders_2020_nfl_draft_picks.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_off0000c9f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9F8 5716 bytes
SHA-256: f7cec7045a94b6e5385dc66a6101279a5e75d607c8b78673c38e8e3f3215cf6f
font_01_sfnt_off0000dd8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD8E 10316 bytes
SHA-256: 797876dbadd593c4caad77c7c4f386e807921a1943bd07abeea97b603e67de73

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