Malicious PDF — malware analysis report

Static analysis result for SHA-256 742cd38aeabc3d9f…

MALICIOUS

PDF

74.9 KB Created: 2021-02-26 05:32:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 321c0d7cc3adbf876b05543ade77bcce SHA-1: d749ff85c8bfd368fec3826ed6bf942c5e4e59ab SHA-256: 742cd38aeabc3d9f3e0b7897bf13ef29c5393553a99ab90979c30de57b5765e4
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm or phishing lure. The presence of external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly indicate that the primary function is to redirect users to potentially harmful external sites.

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://maypoin.ru/strik?utm_term=what+oil+does+a+scion+xb+use PDF link annotation
    • https://nasoluludeg.weebly.com/uploads/1/3/4/4/134435301/7363156.pdfIn PDF document text
    • https://cdn.sqhk.co/sajatanugeg/bzjiiRP/biwag.pdfIn PDF document text
    • https://cdn.sqhk.co/gunonutib/ijboijl/9131594874.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491436/normal_5fd2e9434bfa1.pdfIn PDF document text
    • http://bokifov.iblogger.org/89287009018.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427284/normal_602977ef536d6.pdfIn PDF document text
    • https://vimanofadubob.weebly.com/uploads/1/3/5/3/135304206/zowafurikabakaro.pdfIn PDF document text
    • http://justamorem.com/imu_cet_2019_application_form_correctionzzjbq.pdfIn PDF document text
    • https://wijideziwu.weebly.com/uploads/1/3/2/3/132303229/fanuwame_gudizuvile_widize.pdfIn PDF document text
    • http://ifeelgood.club/2369365696818sbv.pdfIn PDF document text
    • https://cdn.sqhk.co/numokafas/aLCHjh8/how_to_spend_apple_cash_on_amazon.pdfIn PDF document text
    • https://cdn.sqhk.co/nanijamu/jhjb9aS/dominos_near_me_delivery_menu.pdfIn PDF document text
    • https://fikijumosoliz.weebly.com/uploads/1/3/5/4/135400707/bobepuligosi_nokitejoguwagon.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vetanafajodomek.epizy.com/84964982592.pdfIn PDF document text
    • http://fegelefuxenitud.rf.gd/property_damage_report_form.pdfIn PDF document text
    • http://zalowakudedakov.rf.gd/kesari_film_all_song_mr_jatt.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_off0000e52e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE52E 5152 bytes
SHA-256: b68a3ff1fad742f84a70f97186160c608ad857c0f4178f02697384de4cc672da
font_01_sfnt_off0000f6c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C1 11764 bytes
SHA-256: eeb614c2e30bd52a7cf98d39c3103654c192711de8ad0278625d2db1efc800be

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