Malicious PDF — malware analysis report

Static analysis result for SHA-256 4aa6ddbb6aa73372…

MALICIOUS

PDF

72.4 KB Created: 2021-02-12 05:49:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 0166978e84fd2c05d0018b0bc9d95a9f SHA-1: 2b5efc991c9bf113bb61065cf7918a7ca3fd107f SHA-256: 4aa6ddbb6aa733726a4d25b513e2b867edea825341544abfc2a03faf7efbb934
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains and link farms, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious 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://bologen.ru/wix?keyword=antilopine+kangaroo+population PDF link annotation
    • http://zakazuvanadoze.66ghz.com/agnisakshi_malayalam_film_song_free.pdfIn PDF document text
    • http://wagugekewa.22web.org/kolulu.pdfIn PDF document text
    • http://duxolaw.22web.org/chahat_punjabi_song_video.pdfIn PDF document text
    • https://remogomati.weebly.com/uploads/1/3/4/7/134748537/nosevep-xexozi-pikeji.pdfIn PDF document text
    • https://sovanomi.weebly.com/uploads/1/3/5/3/135337195/1934228.pdfIn PDF document text
    • https://fikuzafunowu.weebly.com/uploads/1/3/1/8/131857523/8947397.pdfIn PDF document text
    • https://kobuzefejara.weebly.com/uploads/1/3/1/4/131437799/daranuxanofudu.pdfIn PDF document text
    • http://loduxoxoba.22web.org/sintra_tour_guide.pdfIn PDF document text
    • https://rifijilaguselud.weebly.com/uploads/1/3/4/8/134846829/tonesatibaf.pdfIn PDF document text
    • http://bogavevi.22web.org/rufonafizotemolut.pdfIn PDF document text
    • https://duburidam.weebly.com/uploads/1/3/1/8/131856040/duxanuzigov.pdfIn PDF document text
    • http://br1.red/7575869729381q3m.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/distance_learning_ielts_reading_answers_test_6.pdfIn PDF document text
    • https://s3.amazonaws.com/vexosafugunu/87291794829.pdfIn PDF document text
    • http://nerokezixuzat.epizy.com/duchess_of_malfi_themes.pdfIn PDF document text
    • http://pezatiwasab.epizy.com/13029381610.pdfIn PDF document text
    • https://s3.amazonaws.com/sepawi/ensefalopati_hepatik.pdfIn PDF document text
    • https://s3.amazonaws.com/mokixetat/kemiti.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_off0000e1e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1E0 4864 bytes
SHA-256: 408402573946da0623bcfe4a9c216caf277f026c8fd19befae602237101e053f
font_01_sfnt_off0000f280.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF280 10032 bytes
SHA-256: 96cb65007b6d0e5a99d48fcf87cc4833364c94cc3e7295f790fa232bbde94b10

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