Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a0bc4de811cebfe…

MALICIOUS

PDF

75.2 KB Created: 2020-12-25 05:50:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 78848a004b2fbb6863888628f5e2c1b3 SHA-1: cf6ae27abef5caaef379282538ed94126d1ab9cf SHA-256: 2a0bc4de811cebfe89a708ffa4d3235cd63a815746d86856e6cdbbedb5d752b3
214 Risk Score

Malware Insights

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

The PDF contains numerous links, including one identified as a malicious redirector, suggesting an attempt to lead users to harmful sites. The heuristic firings indicate the document is designed as a link farm, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links are 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/aws?utm_term=writing+equations+from+tables+worksheet+6th+grade In PDF document text
    • https://dopolijakom.weebly.com/uploads/1/3/4/5/134527788/536e24a42cf6b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376101/normal_5f9bfc06eaba7.pdfIn PDF document text
    • https://cdn.sqhk.co/vutexexukus/joEhcgg/67172924648.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417807/normal_5f999b6538eb5.pdfIn PDF document text
    • https://cdn.sqhk.co/zoboxoba/8JhbCuy/rirumokoxejebam.pdfIn PDF document text
    • https://cdn.sqhk.co/kapidibewomu/jdgfTT6/free_slots_to_play.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://s3.amazonaws.com/pizivurapab/aaja_nachle_title_song_pagalworld.pdfIn PDF document text
    • https://s3.amazonaws.com/lolijexejomak/formation_auxiliaire_de_vie_scolaire_lyon.pdfIn PDF document text
    • https://s3.amazonaws.com/jeponowon/masubozubixokukejikexi.pdfIn PDF document text
    • https://s3.amazonaws.com/pavujiniz/bodyweight_workout_plan_to_get_ripped.pdfIn PDF document text
    • https://s3.amazonaws.com/xajowu/diletewagopilukisib.pdfIn PDF document text
    • https://s3.amazonaws.com/bipovoromoj/my_apron_my_schedule_home_depot_login.pdfIn PDF document text
    • https://s3.amazonaws.com/fovezewi/sawidakowidutur.pdfIn PDF document text
    • https://s3.amazonaws.com/fadobirak/free_templates_html_bootstrap.pdfIn PDF document text
    • https://s3.amazonaws.com/vesubodufisi/crioterapia_facial.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_off0000d813.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD813 5792 bytes
SHA-256: 2810cfe859a9e4c14e32dab5dd4ff2eb0f68b5227d1a5fc965358e8fb33f0f19
font_01_sfnt_off0000ebac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBAC 11184 bytes
SHA-256: 82925318f68c6b9b772133fbd145b9a93940f337ae456c6aff0cb5b98f5a4edd
font_02_sfnt_off000111b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111B0 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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