Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e6b04075a94d9a6…

MALICIOUS

PDF

74.7 KB Created: 2021-03-28 05:20:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 069cd07ba85f2f99b83cb3184a0bbcf7 SHA-1: ad82354a5451a8014cd751186bcdfa8000cce004 SHA-256: 5e6b04075a94d9a64cc2d762d99dc40408aad22a10aab3b7b0a52606d26bd06e
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains multiple external URIs, with one specifically identified as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were extracted, the presence of numerous links and the heuristic findings suggest the document's purpose is to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://vilenefex.ru/123?utm_term=spreadsheet+api+reading PDF link annotation
    • http://tifoxikutawe.sportsontheweb.net/10630054049.pdfIn PDF document text
    • http://italia-doc.fun/dnd_3.5e_players_handbookult8a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478670/normal_5fe6c2d090731.pdfIn PDF document text
    • https://zodixezujiz.weebly.com/uploads/1/3/5/3/135345824/peviduzebujogo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454682/normal_5fd888a5bcfbd.pdfIn PDF document text
    • http://cheapestshop.xyz/luxefidulixsp32.pdfIn PDF document text
    • http://sexedate69.site/51663153087ujyan.pdfIn PDF document text
    • https://xivunububan.weebly.com/uploads/1/3/0/9/130969166/zodupomenewubuk.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://tufelurokid.epizy.com/buddy_bolden_s_blues_sheet_music.pdfIn PDF document text
    • http://tetiduba.rf.gd/bd_chaurasia_download_free.pdfIn PDF document text
    • http://naxepatixotilu.rf.gd/79210412158.pdfIn PDF document text
    • http://jizonizop.rf.gd/les_trois_mousquetaires_in_english.pdfIn PDF document text
    • http://figapow.epizy.com/gazumegurabesifeniwe.pdfIn PDF document text
    • http://rikilusidarule.rf.gd/3_modes_of_documentary.pdfIn PDF document text
    • http://bifovigavij.myartsonline.com/lokoruzivunodi.pdfIn PDF document text
    • http://bumurulepowele.myartsonline.com/31505697745.pdfIn PDF document text
    • http://nokejufesuw.atwebpages.com/jj_virgin_diet_recipes.pdfIn PDF document text
    • http://piwapikefiraxi.rf.gd/43614526822.pdfIn PDF document text
    • http://taxifegizuni.epizy.com/pakistan_match_weather_report.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB9C 4972 bytes
SHA-256: cc4676ea9d68ac6eee3728353c58815a10ff6fe5f1b9e1fbd360b37cb956b8a6
font_01_sfnt_off0000ec6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC6B 10560 bytes
SHA-256: c3264d42713a5e3de2c1be73bef8bcb54abf1b479f125b919aecb2cfbc7fe502
font_02_sfnt_off000110a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110A1 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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