Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fc9289f3f1a7012…

MALICIOUS

PDF

67.8 KB Created: 2021-03-24 02:57:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 7afeef4eae7801f9ac5154ae02b15486 SHA-1: fc867a923ed8f9b8bc52d0fe449608f37eb62a93 SHA-256: 3fc9289f3f1a70120a68ea7d4d70b7bad026d47f8b2d1d3438e3b07af0d26748
126 Risk Score

Malware Insights

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

The file is a PDF document that contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document body, though heavily obfuscated, contains text related to 'Facetime png template', suggesting a lure to trick users into visiting the malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://pelibifir.ru/123?utm_term=facetime+png+template PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4504791/normal_5fcf7c6d7a467.pdfIn PDF document text
    • http://noziwop.22web.org/7619110595.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374703/normal_5ff853e67c171.pdfIn PDF document text
    • http://witexodegimo.iblogger.org/dupont_chemical_suit_selection_guide.pdfIn PDF document text
    • http://lupaper.22web.org/die_kleine_raupe_nimmersatt_text_und_bilder.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lepoxas.rf.gd/codycross_answers_group_124_puzzle_4.pdfIn PDF document text
    • http://rorodev.rf.gd/ellipses_and_eccentricity_worksheet.pdfIn PDF document text
    • http://kepinud.rf.gd/2248307084.pdfIn PDF document text
    • https://s3.amazonaws.com/vesubodufisi/bejeweled_2_apk_full_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wunupalezozerud/case_in_point_marc_cosentino.pdfIn PDF document text
    • http://kesakopibovadob.rf.gd/50971698192.pdfIn PDF document text
    • http://dudawugir.epizy.com/python_dash_html_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5aa5a26-a9ae-4f38-80bd-86482c1649a4/37975160366.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/010f22a3-3673-4e13-b65f-d75cba0a3c7c/27452128519.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b0b2f76-86d9-4512-8c52-1264dfbb622a/bagisepavumamot.pdfIn PDF document text
    • https://s3.amazonaws.com/sosupejuxofedo/nadusi.pdfIn PDF document text
    • https://s3.amazonaws.com/dukajevo/27356279174.pdfIn PDF document text
    • http://nujobig.rf.gd/37194332067.pdfIn PDF document text
    • http://bodasubosixo.rf.gd/fuxujujugipolitewa.pdfIn PDF document text
    • https://s3.amazonaws.com/gifiz/11014818885.pdfIn PDF document text
    • http://gufobipadu.epizy.com/bidotogiwize.pdfIn PDF document text
    • http://ximedamolaxeve.epizy.com/oster_bread_machine_manual.pdfIn PDF document text
    • http://kojosire.epizy.com/2019_calendar_uk.pdfIn PDF document text
    • http://nufudojor.epizy.com/92621521591.pdfIn PDF document text
    • http://bisaxofawalep.epizy.com/school_of_thoughts_in_psychology_behaviorism.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33ed9dce-b874-4a92-8d27-913de1ae453b/pigexazuzogi.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_off0000cf26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF26 4936 bytes
SHA-256: 032ed39f2a71453c3371972c3f26a469a4db292e04e0e192205cddb9f6f9f23c
font_01_sfnt_off0000dfe9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFE9 10180 bytes
SHA-256: a5d10423301a424023d29e3ab8adac6cceb5ab533ec981c33d53f6c35bdaa3eb

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