Malicious PDF — malware analysis report

Static analysis result for SHA-256 5328390c418a64bd…

MALICIOUS

PDF

88.4 KB Created: 2021-02-20 04:08:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 1d8469164e6783902a6019a77a080570 SHA-1: 2d2d964909a2cfa8e26ae1844451043ca8c297b5 SHA-256: 5328390c418a64bd08c4458ac78057c75855ec5480ffbbd2006ba777c43a21ec
134 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs and is flagged by ML classifiers and ClamAV as malicious, indicating a phishing or malware distribution attempt. The heuristic 'SE_URGENCY_LURE' suggests the document content aims to create a false sense of urgency to prompt user interaction with the malicious links. No scripts were extracted, but the presence of numerous external URIs points to a likely download or redirection mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://jacksth.ru/strik?utm_term=hp+laserjet+p4015+fuser+part+number PDF link annotation
    • http://lovelid.xyz/bc_rental_agreement_formkjkrd.pdfIn PDF document text
    • https://cdn.sqhk.co/mugolino/cQijpjf/amazon_kindle_paperwhite_2020.pdfIn PDF document text
    • http://update-win20.online/644951061618tuac.pdfIn PDF document text
    • https://cdn.sqhk.co/mujexoxa/heqxXgc/85219288314.pdfIn PDF document text
    • http://particulieres-societegenerale.best/resource_bundle_android_examplegq8t7.pdfIn PDF document text
    • https://cdn.sqhk.co/sejiragidu/U1mjgge/pedorunajuk.pdfIn PDF document text
    • https://cdn.sqhk.co/ketegobuto/YhhjBgj/reaver_titan_forgeworld.pdfIn PDF document text
    • http://topstudy.fun/detotefidunat88zr.pdfIn PDF document text
    • https://cdn.sqhk.co/tifatuju/cjgwFia/94355731068.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460461/normal_5ffa6c6ec8457.pdfIn PDF document text
    • https://cdn.sqhk.co/rojozedofaf/hjijd9t/freemeteo_krnjaca_beograd.pdfIn PDF document text
    • https://cdn.sqhk.co/xaloridinef/qggHHy6/sotelanorapo.pdfIn PDF document text
    • http://thehensleys.org/libros_para_aprender_ingles_con_audioikntq.pdfIn PDF document text
    • https://cdn.sqhk.co/zaweniwefi/ghhpgjL/6603495769.pdfIn PDF document text
    • https://cdn.sqhk.co/nupozifulija/pieiiO8/drifters_burgers_locations.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/wizuluworafid/90623010950.pdfIn PDF document text
    • https://s3.amazonaws.com/xaliwalufoguni/impact_of_modern_agriculture_on_soil.pdfIn PDF document text
    • https://s3.amazonaws.com/retobifulipo/antietam_licensed_battlefield_guide_exam.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010210.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10210 5628 bytes
SHA-256: a25fe11c42c5acb6ad3317af38ef14ad2c442cec29b483a44ef2af8dae525f25
font_01_sfnt_off00011527.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11527 11756 bytes
SHA-256: 0b038f4b6375e7f73083686453ac89719a13de9d2c92ac9591ca32b6b9712b9e
font_02_sfnt_off00013d51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D51 16092 bytes
SHA-256: 39b2f4b99ee08965fd4836f89f628a00cde8346cb181131bba0308e80db8fb67

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