Malicious PDF — malware analysis report

Static analysis result for SHA-256 29d2ee725532959f…

MALICIOUS

PDF

74.1 KB Created: 2021-04-28 13:41:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 9a316213b83f26e52e4ae8fa27203ff9 SHA-1: 7e5a22c50353e306b92703e54c19ec223ea1929e SHA-256: 29d2ee725532959f95d0f008b6a54c868769b00845575db3b4ea0dc19847eec5
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable hosting or redirectors, indicating a link farm designed to obscure malicious destinations. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were extracted, the PDF structure and embedded links are characteristic of social engineering lures.

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://druttle.ru/strik?utm_term=power+cooker+recipes+chicken+thighs PDF link annotation
    • https://wesarifalonaba.weebly.com/uploads/1/3/5/9/135961423/5365ea4.pdfIn PDF document text
    • http://zedukibawubige.22web.org/nogibif.pdfIn PDF document text
    • http://rajukilodagoje.mygamesonline.org/35379923275.pdfIn PDF document text
    • http://rajonilelubej.22web.org/john_dewey_theory_of_experience_and_learning.pdfIn PDF document text
    • https://mateboxabivof.weebly.com/uploads/1/3/4/7/134763458/f0766875f4.pdfIn PDF document text
    • https://poxatekegevu.weebly.com/uploads/1/3/4/7/134753674/3333736.pdfIn PDF document text
    • http://silujokiz.mypressonline.com/ajcc_8th_edition.pdfIn PDF document text
    • http://bexunorisomev.iblogger.org/the_managed_heart_arlie_hochschild.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nixipidulateva.rf.gd/simple_reading_worksheets.pdfIn PDF document text
    • http://notijukigexu.rf.gd/baldurs_gate_dark_alliance_xbox_360.pdfIn PDF document text
    • https://s3.amazonaws.com/busutafitufe/55814516237.pdfIn PDF document text
    • http://nitobub.rf.gd/appsc_panchayat_secretary_previous_papers_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/730c554e-bf21-40b0-a897-ecde26df1738/dell_755_tower_specifications.pdfIn PDF document text
    • http://vananoxozonu.epizy.com/14025666410.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/beb50c03-8d11-48f6-b17f-aa74498e7309/what_alien_race_is_ahsoka_tano.pdfIn PDF document text
    • http://viduzakovovamu.rf.gd/83995774201.pdfIn PDF document text
    • https://s3.amazonaws.com/tufujifinobiro/florida_space_coast_fishing_report.pdfIn PDF document text
    • http://pidusuzelaju.epizy.com/69461983080.pdfIn PDF document text
    • http://ropupifalapoges.atwebpages.com/wopemim.pdfIn PDF document text
    • https://s3.amazonaws.com/gisujubolidine/kosud.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_off0000e563.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE563 5112 bytes
SHA-256: 4df6451f5fcdfec2de7adebf3216c8739fc54799bcf813dea1daef1f8bd8c738
font_01_sfnt_off0000f6df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6DF 10708 bytes
SHA-256: ab6312df32775cfcc7b373b9acb8102394fea6b0d91e47cf9d9dd0178472083b

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