Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9c3d49006361dc0…

MALICIOUS

PDF

69.0 KB Created: 2020-12-24 04:10:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 17aa99cc236e7119c0d5c4603540d76e SHA-1: 890b45994316a618a1191d56d17dc0316991a80a SHA-256: b9c3d49006361dc06516ea598805b2729c6ecfa9163d01f31fdc04632b1f140e
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a known malicious redirector. The ClamAV detection and ML classifier also indicate malicious content. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious sites, aligning with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://ggtraff.ru/wb?keyword=60%20seconds%20atomic%20adventure%20ios%20review In PDF document text
    • https://cdn.sqhk.co/letowajaf/jcGggf3/25459236481.pdfIn PDF document text
    • https://polaposegit.weebly.com/uploads/1/3/4/5/134591324/1753348.pdfIn PDF document text
    • https://cdn.sqhk.co/duxajoje/IjhogfD/jurassic_park_game_pc_online.pdfIn PDF document text
    • https://cdn.sqhk.co/jelivapizivo/gj8ihFA/64611850744.pdfIn PDF document text
    • https://xukaxikerebata.weebly.com/uploads/1/3/4/0/134042698/zalamu.pdfIn PDF document text
    • https://cdn.sqhk.co/wuluzajiroz/jZgfDg2/lesijomufeguxi.pdfIn PDF document text
    • https://cdn.sqhk.co/niturunajik/QQPegfE/xakajuzawixeludeger.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nuselufuzo/catia_v5_workbook_release_v5-_6r2013.pdfIn PDF document text
    • https://s3.amazonaws.com/xumakomowi/20344121433.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed07df53-e7a7-4bba-91eb-802f73009fed/lexezu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49bf37f8-fd19-4bad-a9b2-1809c5d84005/17142393610.pdfIn PDF document text
    • https://s3.amazonaws.com/pirofopafu/facebook_pixel_installation_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/oppo_theme_store_apk_english.pdfIn PDF document text
    • https://s3.amazonaws.com/nemafu/hoover_spinscrub_50_filter.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_off0000d07c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD07C 5404 bytes
SHA-256: 8e6f4adc4d24a38ebc32e1390eed3cac02639c1245df2abac1999677bce581d9
font_01_sfnt_off0000e2d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2D4 10668 bytes
SHA-256: a84157aec0f1cab8a853ca03ba00a621a4b5aa14f2ea65c8e8aaf26f4399574c

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