Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c441e17f72fb277…

MALICIOUS

PDF

78.6 KB Created: 2021-01-21 03:43:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: b8d512555ef8320e3ae0c3807fd51732 SHA-1: 77d7335d3307b19201544e7ffc076bc292541043 SHA-256: 8c441e17f72fb277b1e9f2695a5c61f1ece0feb1f9cb7b778e48ffb9f8fb5471
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, with one specifically targeting a 'city of san diego business license change of address' query, indicating a phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to a phishing site or download further malware. Although no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a malicious document designed for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://trafftec.ru/123?utm_term=city+of+san+diego+business+license+change+of+address PDF link annotation
    • https://site-1174133.mozfiles.com/files/1174133/awesome_tanks_3_and_4.pdfIn PDF document text
    • http://vejefulolite.22web.org/vosig.pdfIn PDF document text
    • https://cdn.sqhk.co/poxudanefisi/JhjCjjH/votalegatodimilijupo.pdfIn PDF document text
    • https://cdn.sqhk.co/lokutibu/6jeYieT/lyrical_photo_video_maker_download.pdfIn PDF document text
    • https://cdn.sqhk.co/suwapipejob/ihdjgHX/dalexekujibosipizelunudex.pdfIn PDF document text
    • http://wodunobogigav.22web.org/access_documents_in_google_sheets.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451047/normal_5fe6e9b32e3c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468823/normal_5fd2a2eeda110.pdfIn PDF document text
    • https://site-1175227.mozfiles.com/files/1175227/1063348011.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376879/normal_5ff36c12ef11e.pdfIn PDF document text
    • https://site-1167971.mozfiles.com/files/1167971/araba_oyunu_indir_apk_day.pdfIn PDF document text
    • https://site-1247335.mozfiles.com/files/1247335/iron_man_mark_46_helmet_template.pdfIn PDF document text
    • https://cdn.sqhk.co/powirafawume/vlB8gf7/dukiwijebibebujax.pdfIn PDF document text
    • https://site-1173639.mozfiles.com/files/1173639/50000476863.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://retuguru.epizy.com/accounting_exercises_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/wunupalezozerud/63455655343.pdfIn PDF document text
    • https://s3.amazonaws.com/dadupawo/73332908102.pdfIn PDF document text
    • https://s3.amazonaws.com/wisuw/hungarian_sonata_sheet_music_richard_clayderman.pdfIn PDF document text
    • https://s3.amazonaws.com/latufenaw/45232845017.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F4 5432 bytes
SHA-256: 3304883d1887266b6c78b0e1f970685f57b5cdb4f5cc999f7810dd905bdee286
font_01_sfnt_off0000fb64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB64 10228 bytes
SHA-256: 97ead808f0b4c7e10c9c230f69103d6b79d13bd41fa1350cb353fad525b4907d
font_02_sfnt_off00011e47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E47 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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