Malicious PDF — malware analysis report

Static analysis result for SHA-256 a122163ed613bb70…

MALICIOUS

PDF

69.4 KB Created: 2021-02-25 19:59:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 4f1b0c81b8202fc3130f3c9f96957700 SHA-1: 4507871e0fff5784c79ac9cd546b393d5525b04e SHA-256: a122163ed613bb70ed4c6a5ffbed9594b6d6d02e80fe8a7fa2abcf5aaf7f8b41
126 Risk Score

Malware Insights

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

This PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan variant. It contains numerous external URIs, many of which point to disposable hosting or link farms, suggesting a phishing or spamming operation. The document body, though heavily obfuscated, appears to reference job listings, a common lure for phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://baarspo.ru/aws?utm_term=pak+navy+civilian+jobs+2020+august PDF link annotation
    • https://cdn.sqhk.co/suxujaba/jjdNDhe/37593679956.pdfIn PDF document text
    • http://copyrightnotices-form.com/how_many_calories_are_in_a_cheesy_bean_and_rice_burrito_from_taco_bellz9d7a.pdfIn PDF document text
    • https://cdn.sqhk.co/wesaduleb/iT6ogjq/1000_words_text_example.pdfIn PDF document text
    • http://bomaduworofa.medianewsonline.com/fojebujupenebaxotol.pdfIn PDF document text
    • http://wijasagasipode.getenjoyment.net/dark_blue_dress_coat.pdfIn PDF document text
    • https://sibomimotilelib.weebly.com/uploads/1/3/4/2/134235458/bubabisu_banivisofebivat.pdfIn PDF document text
    • https://kawawipebezuvo.weebly.com/uploads/1/3/1/4/131409621/b63b47bf2bd639.pdfIn PDF document text
    • http://gepexoliv.medianewsonline.com/discrete_mathematical_structures_4th_edition.pdfIn PDF document text
    • https://cdn.sqhk.co/dugabolisuma/fNrKPdb/67464447405.pdfIn PDF document text
    • https://cdn.sqhk.co/vesagivara/MjdjgVG/burabonaxodili.pdfIn PDF document text
    • https://nidabiweni.weebly.com/uploads/1/3/4/8/134865500/jurazasewitavi-jutipodal-wetujakurila-gigawepanu.pdfIn PDF document text
    • http://216tilford.com/vodidome4ckub.pdfIn PDF document text
    • http://muzoc.xyz/cover_letter_template_for_nursing_assistant2wqpd.pdfIn PDF document text
    • http://gexomafe.mypressonline.com/kenmore_80_series_stopped_working.pdfIn PDF document text
    • http://pofuxubilet.sportsontheweb.net/cuisinart_ss-10_vs_ss-700.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vubelifijam.atwebpages.com/motion_to_amend_probation_conditions.pdfIn PDF document text
    • http://bozudob.epizy.com/acmg_standards_and_guidelines.pdfIn PDF document text
    • http://fiforeru.atwebpages.com/mixefamirimaxepedene.pdfIn PDF document text
    • http://nuzetewadan.epizy.com/ms_office_gantt_chart_template.pdfIn PDF document text
    • http://jolafefiluw.rf.gd/rodonatilito.pdfIn PDF document text
    • http://zepukedosapiw.rf.gd/nizuzeg.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_off0000d1b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1B6 5588 bytes
SHA-256: 076bfd025b7c4d30e8faede693d5339f4dbd528f7ff1f73d2931c9a5d0abee6e
font_01_sfnt_off0000e4e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4E8 10416 bytes
SHA-256: 53720adc6c09d68eb6267490c88863ea511617588d8dff48e3fd847774bb2e28

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