Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e89a8bb5cd465a0…

MALICIOUS

PDF

100.3 KB Created: 2021-04-15 08:00:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: b505fbafaeea3289d94f73ce059a2d88 SHA-1: 538e9aaedc8653744fe13bd8f77cf20e916f935b SHA-256: 1e89a8bb5cd465a02947a20dd229a8a3a4f9459d287c8a9df952949c5f496a0b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://jottigo.ru/strik?utm_term=resumen+del+libro+etica+para+amador+capitulo+9 PDF link annotation
    • https://cdn.sqhk.co/rotazokufaj/Oiahjjb/gaxugoriditapozabafem.pdfIn PDF document text
    • http://midesamipazizuj.scienceontheweb.net/rolling_process_in_metal_forming.pdfIn PDF document text
    • https://cdn.sqhk.co/mivezifov/dJ4ELhc/how_is_your_day_funny_answers.pdfIn PDF document text
    • http://bawimip.sportsontheweb.net/84362898074.pdfIn PDF document text
    • https://cdn.sqhk.co/pusuvizodez/hdgcijn/epic_battle_simulator_2_pc_free.pdfIn PDF document text
    • https://cdn.sqhk.co/tavikalamo/TSjjajd/83463036669.pdfIn PDF document text
    • http://lekezoreg.22web.org/diameter_and_radius_worksheets.pdfIn PDF document text
    • https://cdn.sqhk.co/pijajawopoji/2hdaii7/android_auto_apk_4._7._5938.pdfIn PDF document text
    • http://vijofogozorumi.22web.org/maximum_ride_age_rating.pdfIn PDF document text
    • https://cdn.sqhk.co/gapebeve/jjjfnbe/99626346993.pdfIn PDF document text
    • https://cdn.sqhk.co/befozaxulot/hegjOnJ/66501304235.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://biwewoxowimin.rf.gd/20264761521.pdfIn PDF document text
    • https://s3.amazonaws.com/tokudapele/zunatofopufuwanaju.pdfIn PDF document text
    • https://s3.amazonaws.com/tesapibebujep/rawemo.pdfIn PDF document text
    • https://s3.amazonaws.com/loranoduzuja/left_atrial_pressure_waveforms.pdfIn PDF document text
    • https://s3.amazonaws.com/wifukedot/suzovesozomawi.pdfIn PDF document text
    • http://jafixomedimun.onlinewebshop.net/generalized_anxiety_disorder_dsm_5_criteria.pdfIn PDF document text
    • http://dopodisimedu.epizy.com/mipokivujoje.pdfIn PDF document text
    • http://ruboratanon.rf.gd/systems_engineering_and_analysis_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxirefare/74143757879.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_off000146d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146D0 5524 bytes
SHA-256: 94a2aef4a668aa168c0a0912177540ba4ca646e62e4f2852fb41284ef4dcf892
font_01_sfnt_off00015978.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15978 12632 bytes
SHA-256: 42b4ea44780293dae7c5a92e02af23f2d6442444ca13c518b84feb4449e64a38

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