Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dfe37b6384841ed…

MALICIOUS

PDF

98.2 KB Created: 2021-01-06 01:43:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 480a73249e9cb88099098b2763a8efcc SHA-1: d636540498a42607bbc15d4a1503c7f2fd61963a SHA-256: 2dfe37b6384841ed4740f3c906708bf0120be6eaa75c669a1587c59e38588671
156 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, with at least one heuristic specifically flagging a 'PDF_SEO_LINK_FARM' suggesting a tactic to drive traffic to various sites. The presence of embedded URLs and the PDF structure strongly suggest this document is intended to redirect users to potentially harmful external content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/aws?utm_term=alien+guide+sims+4
    • https://cdn.sqhk.co/wifavizen/75Mifje/history_channel_vikings_season_5_episode_1.pdf
    • https://jodisugej.weebly.com/uploads/1/3/4/7/134732418/4400331.pdf
    • https://tupokigefadewun.weebly.com/uploads/1/3/4/7/134702618/vidunosunegamo_sedanepezabibo_rugexedavof.pdf
    • https://cdn.sqhk.co/bepemuno/jfM0eif/rubirunetudoluje.pdf
    • https://cdn.sqhk.co/xamubana/ghjSVih/nail_salons_near_me_low_prices.pdf
    • https://cdn.sqhk.co/gefisodir/ibYxMsx/pamebowanuxasapuf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/sefiwegegagu/zefewazotiduxumidoberugab.pdf
    • https://uploads.strikinglycdn.com/files/2d355e36-ea70-4082-a78b-742ba1098727/fasevivisotajajifut.pdf
    • https://s3.amazonaws.com/daxemo/fools_rush_in_full_movie_hd.pdf
    • https://uploads.strikinglycdn.com/files/15d772a7-5c6d-43a4-adb6-94eb794c9d65/travis_scott_a_man_lyrics.pdf
    • https://uploads.strikinglycdn.com/files/f0fbbf75-3258-4955-ba34-84b19bc7f7e2/97258240928.pdf
    • https://s3.amazonaws.com/muwomapotumugi/letter_of_application_for_job_template.pdf
    • https://uploads.strikinglycdn.com/files/96c4bc3d-d0f5-447d-b6c4-e2f64671eb2d/kusuk.pdf
    • https://uploads.strikinglycdn.com/files/6471aac4-1e11-43d9-8148-678692e0d332/irma_fuenlabrada_pensamiento_matematico.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001437c.bin
4f3ab5340e694d4be889400ef187a97af5aae38df8b3a8c0f6bff1915d2f221e
pdf-font-stream PDF embedded font (sfnt) at offset 0x1437C 4916 bytes
font_01_sfnt_off00015434.bin
04059bba2e8cfa7b507f03b34ef253b5d0abbb50ef4cb94fcc1c4295d79c3923
pdf-font-stream PDF embedded font (sfnt) at offset 0x15434 11860 bytes