Malicious PDF — malware analysis report

Static analysis result for SHA-256 02d34741320a0fd0…

MALICIOUS

PDF

73.6 KB Created: 2021-02-16 20:09:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 4604035b0d283f0d5775b7c4d0a86d65 SHA-1: 98c79f72d770aa5a65d52b1620498c69048f9dbb SHA-256: 02d34741320a0fd03b68a14bf103e65d4a036454fabe16d28a59c1aa05877339
126 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning model indicated a high probability of maliciousness. It contains numerous embedded URLs, with at least one pointing to a domain associated with link farming and potentially phishing or malware distribution. The presence of external URIs and the classification as a link farm suggest an attempt 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://maypoin.ru/123?utm_term=i+have+heard+that+you+settled+down+lyrics PDF link annotation
    • https://cdn.sqhk.co/xolovagi/f8uKjgg/fezedapafijuru.pdfIn PDF document text
    • http://wukosemat.22web.org/advanced_analysis_of_algorithms.pdfIn PDF document text
    • https://cdn.sqhk.co/kogeledewafo/icX1hhc/auto_photo_cut_paste_app.pdfIn PDF document text
    • https://cdn.sqhk.co/tefulobesa/56SrDMa/eagles_greatest_hits_vinyl_youtube.pdfIn PDF document text
    • https://cdn.sqhk.co/mopomotop/FjehgG0/fondant_cake_decorating_starter_kit.pdfIn PDF document text
    • https://cdn.sqhk.co/moxinivo/0ggjh7c/ritusu.pdfIn PDF document text
    • https://cdn.sqhk.co/lebogomatoze/y1Zgdja/metabuvujera.pdfIn PDF document text
    • https://cdn.sqhk.co/niramojiga/D8Y6idd/wexajarukivupixu.pdfIn PDF document text
    • https://cdn.sqhk.co/silijebutu/heIjgjc/nukixebedasoda.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dokelegusipodi.epizy.com/79566161832.pdfIn PDF document text
    • https://s3.amazonaws.com/wezukep/corrugated_plastic_roofing_sheets_canada.pdfIn PDF document text
    • https://s3.amazonaws.com/jijumupade/how_often_should_cardiovascular_exercise_be_performed.pdfIn PDF document text
    • http://lixutepojux.rf.gd/gawizoxoxufanaduz.pdfIn PDF document text
    • http://fefezaw.rf.gd/twilight_breaking_dawn_part_1_ost.pdfIn PDF document text
    • http://buzuvemujogumob.epizy.com/cake_pictures_hd.pdfIn PDF document text
    • http://rumeponiwogegok.rf.gd/dragon_ball_z_super_shin_games.pdfIn PDF document text
    • http://bomiboduju.epizy.com/dugurorakulesol.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_off0000e0ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0AE 5220 bytes
SHA-256: 047d71342a8ee5a30c5b13ead9ffa5e2f458d4a0460b27cf172749563b4cad88
font_01_sfnt_off0000f280.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF280 11312 bytes
SHA-256: e28cb531b7fad14813aa365478ae878e1a077bfc6feef08def01402d236f9945

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