Malicious PDF — malware analysis report

Static analysis result for SHA-256 800ddc735072cd21…

MALICIOUS

PDF

72.0 KB Created: 2021-03-03 16:16:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: a6945de2aa478e4c8f554cf06b8b44ea SHA-1: 702fed93647d3a18f4a41c489806103ce31afaf0 SHA-256: 800ddc735072cd21cfd1094f0b87593cd8c05ee17e5c2d1c6b23f45d8590a526
126 Risk Score

Malware Insights

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

The PDF file contains embedded URLs that redirect to a link farm, suggesting a phishing or scam attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful content.

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://gimoguvi.ru/strik?utm_term=how+to+program+my+comcast+remote+to+my+toshiba+tv PDF link annotation
    • https://relulime.weebly.com/uploads/1/3/4/3/134384492/1f916fc952.pdfIn PDF document text
    • http://visiwetivopewe.iblogger.org/usa_hockey_rink_template.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480389/normal_60132f95d9fe2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461207/normal_6026da96a3831.pdfIn PDF document text
    • http://hermidkovo.info/2004_chevy_malibu_maxx_repair_manual1q4wq.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452392/normal_60073dba684d4.pdfIn PDF document text
    • https://mivewuwadomabat.weebly.com/uploads/1/3/1/6/131606259/zifimebafele.pdfIn PDF document text
    • http://pubomoxagu.22web.org/65832818617.pdfIn PDF document text
    • https://xutafutixon.weebly.com/uploads/1/3/4/5/134576274/movuxilikasoba.pdfIn PDF document text
    • http://kipamaf.22web.org/what_were_the_two_political_parties_in_1796.pdfIn PDF document text
    • https://nudomituge.weebly.com/uploads/1/3/4/6/134677479/3978c31dcc38927.pdfIn PDF document text
    • http://arfesopt.com/ragerigexumaturisune4up5.pdfIn PDF document text
    • http://sberpodarok2020.online/tipupakogivonorugukakalu18z9o.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zizokeb.rf.gd/zakubetuton.pdfIn PDF document text
    • http://gejujebiwibi.epizy.com/2599148399.pdfIn PDF document text
    • http://widafasamuj.epizy.com/bidejitarexidegiluvitiz.pdfIn PDF document text
    • http://nepafex.epizy.com/hallelujah_chords_g.pdfIn PDF document text
    • http://wosesulejebus.epizy.com/gibbs_free_energy_problems_and_answers.pdfIn PDF document text
    • http://gisipusizen.rf.gd/driven_to_distraction_quiz_answer_key.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_off0000dca4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCA4 5672 bytes
SHA-256: 2a5b89b6e26eef60d6c5afc66ce7fe56b1bd927aeef66ba9377b7ec25640c7f4
font_01_sfnt_off0000efdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFDF 10320 bytes
SHA-256: 5c2fd7e030442c31cde8c6d3af083534c3b07a7bac0b8964be79319ea713ce3f

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