Malicious PDF — malware analysis report

Static analysis result for SHA-256 2025952cee07e688…

MALICIOUS

PDF

82.6 KB Created: 2021-03-04 18:35:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 44aed8d57946bcf4d3454c430b39fc9a SHA-1: cd6903ae5d0e13463ad923a0387f1fec8c750c42 SHA-256: 2025952cee07e688ce8f088561d704adf83bd114be5e7199ee1f38cb400e1e2a
126 Risk Score

Malware Insights

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

The PDF was flagged by ML and ClamAV as malicious, with heuristics indicating it's a link farm on disposable hosting. The embedded URL points to a printer error message, likely a lure to disguise malicious activity. Although no scripts were explicitly extracted, the PDF structure and external links suggest it's designed to redirect users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/123?utm_term=hp+p3015+printer+error+49.4c02 PDF link annotation
    • https://cdn.sqhk.co/lemusezilaz/hhhbibF/pekire.pdfIn PDF document text
    • http://small-italy.space/mamisolutisoroponurivzyc.pdfIn PDF document text
    • https://cdn.sqhk.co/potiribuwuf/EhhijfK/talking_angela_creepy.pdfIn PDF document text
    • https://cdn.sqhk.co/nujekezitifi/ejgjeiu/cat_run_cycle_tutorial.pdfIn PDF document text
    • https://cdn.sqhk.co/xovikojux/Fjgij0r/20194996469.pdfIn PDF document text
    • https://cdn.sqhk.co/zewumirapeb/jeifihk/british_pronunciation_werewolf.pdfIn PDF document text
    • http://raffle.website/78159568101hgs5a.pdfIn PDF document text
    • https://cdn.sqhk.co/kisereta/jij4xp0/suxevatixonore.pdfIn PDF document text
    • https://cdn.sqhk.co/getabemuto/ciiijnR/pifajobidapi.pdfIn PDF document text
    • http://betflixguvenilirmi.com/150088187340579q.pdfIn PDF document text
    • https://cdn.sqhk.co/nadipozow/jgiftgg/38092918295.pdfIn PDF document text
    • http://makamar.online/libro_de_fisica_1_medio_2019_ministerio_de_educacionag0fx.pdfIn PDF document text
    • http://secureappeal.com/idle_skilling_pocket_rpg_tycoon_apkmdumg.pdfIn PDF document text
    • http://madewithsunshine.com/ardy_knights_thieving_guidef0qxd.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/gewuwasi/afmg_notes_free.pdfIn PDF document text
    • http://dadosekim.epizy.com/9476428110.pdfIn PDF document text
    • https://s3.amazonaws.com/niwotipugonuvoz/area_of_triangle_parallelogram_trapezoid_worksheet.pdfIn PDF document text
    • http://mofibukuzoke.rf.gd/kitavupumug.pdfIn PDF document text
    • https://s3.amazonaws.com/sudevejerifu/3971750564.pdfIn PDF document text
    • https://s3.amazonaws.com/votawawo/can_you_get_american_truck_simulator_on_ps4.pdfIn PDF document text
    • https://s3.amazonaws.com/tixedujegibex/kidowanolidazekomepapov.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_off000105d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105D6 5356 bytes
SHA-256: 737b6f37cd56fcae105f7b93978c3a05e31621062884e399a534f7924f3e782a
font_01_sfnt_off00011839.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11839 10972 bytes
SHA-256: 72917df28f308dbae6c665ab157ca7f340bba1c6b7ed93bd5bd21ed38dc79d40

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