Malicious PDF — malware analysis report

Static analysis result for SHA-256 dca5641c87de7a87…

MALICIOUS

PDF

69.9 KB Created: 2021-02-14 11:27:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 030faf94f19eae0561b57bcc27a7c88d SHA-1: 3248c01a0811645e971e291af50f13e4deaaa68d SHA-256: dca5641c87de7a8731969a0063556784e59cee84b975fb4ea0f694084b03ea0b
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the presence of external URIs and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggest the document is designed to redirect users to malicious sites, likely for credential harvesting or further payload delivery.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://seumenha.ru/wb?keyword=construction%20company%20brochure%20template%20free PDF link annotation
    • https://xebolefijepipol.weebly.com/uploads/1/3/0/7/130739937/delexiguxujuzu.pdfIn PDF document text
    • http://sis-paypal.com/46873890413qv1xc.pdfIn PDF document text
    • https://legutuxubumid.weebly.com/uploads/1/3/1/8/131872058/31a91c11b5ce8.pdfIn PDF document text
    • http://7evenrp.ru/38989581396o714s.pdfIn PDF document text
    • https://cdn.sqhk.co/bofagenined/ihhiigj/kofezesiw.pdfIn PDF document text
    • https://vamekatowozi.weebly.com/uploads/1/3/0/8/130814347/5a285.pdfIn PDF document text
    • http://cz-nitrof.website/bloom_ball_projectnxtcd.pdfIn PDF document text
    • http://ig-socialmedia.xyz/download_aadc_2_blurayn6g1v.pdfIn PDF document text
    • http://loveantravel.xyz/kafulumubasakixqo0rx.pdfIn PDF document text
    • https://fogufufizanalu.weebly.com/uploads/1/3/0/8/130813948/xuxeduvamimejiw_fabevelewen_dadodex.pdfIn PDF document text
    • http://maslovauto.ru/ruwufipufunapmpau.pdfIn PDF document text
    • https://tunoritusaw.weebly.com/uploads/1/3/5/3/135328070/xikolokazomisesura.pdfIn PDF document text
    • http://fitness1.space/24095771483biwz5.pdfIn PDF document text
    • https://widufosonetorif.weebly.com/uploads/1/3/4/5/134598319/2577560.pdfIn PDF document text
    • http://prizinsta365.website/98869566626oyw0d.pdfIn PDF document text
    • https://cdn.sqhk.co/lizupasepafu/ehiBkih/dragon_ball_z_infinite_world_online_game.pdfIn PDF document text
    • http://lnstagramcopyrightcenter.com/canis_canem_edit_pc_freemc9wd.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/zakunafu/blueant_q2_bluetooth_headset_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/jidosatikim/jawotuwa.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_off0000d4ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4BA 5404 bytes
SHA-256: cb480003e0ec9401d856553a88d022f11e612dcb1afb79007207d255d8fc8fd6
font_01_sfnt_off0000e6f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6F0 10352 bytes
SHA-256: c0c121178cad33abdfc2fb5061cd8aadb9f5b4326d9c80d9e2f32727932ff00e

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