Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8d148f38bd4035f…

MALICIOUS

PDF

67.7 KB Created: 2021-04-05 06:55:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 93146d9b761e27e376d5d55d9af57e61 SHA-1: 7d13dc87a3917ddd1c5e1f63d0fed8f4eea661cb SHA-256: e8d148f38bd4035f15a873a979c539a36e4e9919dcd7e33faf8552d5712633d1
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a machine learning classifier and ClamAV, as malicious. It contains numerous embedded URLs, one of which is a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, appears to be a lure related to product listings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://kuzutuzo.ru/strik?utm_term=navy+blue+nike+tech+fleece+joggers PDF link annotation
    • https://rejobasagiletez.weebly.com/uploads/1/3/4/6/134642313/dodatidikefim-neselujobameta-mekugijakokiju-rivofegu.pdfIn PDF document text
    • http://vukufisoxe.iblogger.org/alesis_sr_16_service_manual.pdfIn PDF document text
    • https://kuxubujokug.weebly.com/uploads/1/3/0/7/130775750/pawobi-luvaxoke.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417305/normal_601d2bcdb9667.pdfIn PDF document text
    • https://sebupemisopuba.weebly.com/uploads/1/3/4/7/134706320/bimaki_vujagivogorikip_motavejomikodod_puluzibawop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418991/normal_5fd34adeaa4a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475739/normal_60274ff8611b5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461481/normal_600109ed2c0a2.pdfIn PDF document text
    • https://rexizoxulod.weebly.com/uploads/1/3/5/3/135399206/35d3121f16c1e00.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366377/normal_6041e4afd1481.pdfIn PDF document text
    • https://jixidaku.weebly.com/uploads/1/3/4/4/134495137/4662441.pdfIn PDF document text
    • http://pufivuziviv.mypressonline.com/64793635320.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xurosuforudev.atwebpages.com/biology_questions_for_rrb_ntpc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7026f774-5694-48ca-9e5c-4f3b8920cb7b/the_gospel_centered_life.pdfIn PDF document text
    • http://bepolujogox.atwebpages.com/3491480752.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7866bdf-b711-4c73-ab60-38cab23dd7f9/kokemidov.pdfIn PDF document text
    • http://bigofuzov.epizy.com/2012_dodge_durango_crew_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca622818-904b-4cd1-a250-8514635b2145/streaming_film_after_met_you_lk21.pdfIn PDF document text
    • http://dotabujov.rf.gd/38508776849.pdfIn PDF document text
    • http://kawalupuzode.epizy.com/ias_anthropology_study_material.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_off0000ca76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA76 5552 bytes
SHA-256: 08bb8e1ae37d318477cd07fa8270cf9fc31bde8aed864a2ccb84dcc7feb909f2
font_01_sfnt_off0000dd79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD79 10420 bytes
SHA-256: 33a57d329a50b6398961a764850bf35cbdb14b96f834c3205fd4c2871a7e8a77

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