Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2dac6f1f08f1a82…

MALICIOUS

PDF

83.9 KB Created: 2021-02-26 04:13:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: a896019f9c933ced72bf0601ddb3ef00 SHA-1: 1a6eb70af63521be981fcc718b83d78872b6aef1 SHA-256: f2dac6f1f08f1a821abc7940a2c75ca534a9ff187dab070b0d6c9347fbee9d6d
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded links pointing to known malicious redirector infrastructure, specifically 'https://yafferge.ru/award?keyword=mists+of+pandaria+flying'. The ML classifier and ClamAV detection strongly indicate malicious intent. The document's structure and embedded URLs suggest it is designed to lead users to phishing or malware distribution sites, likely as part of a spearphishing campaign.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/award?keyword=mists+of+pandaria+flying In PDF document text
    • https://cdn-cms.f-static.net/uploads/4382779/normal_5fe676f87f589.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406456/normal_602f355559e15.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494432/normal_6038515199864.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417543/normal_5fedfd88302ca.pdfIn PDF document text
    • https://cdn.sqhk.co/woleparos/j9oUJhj/nuzanadasobi.pdfIn PDF document text
    • https://cdn.sqhk.co/furaxofir/gWzalHX/the_big_bang_2010_full_movie.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451755/normal_60033e388c215.pdfIn PDF document text
    • http://sevowina.medianewsonline.com/is_fantastic_beasts_based_on_a_book.pdfIn PDF document text
    • https://cdn.sqhk.co/figakeves/jeNhewa/dinosaur_jumper_for_rent.pdfIn PDF document text
    • http://sunufosabupes.scienceontheweb.net/the_pretty_woman_movie_online.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489976/normal_6032085098d80.pdfIn PDF document text
    • https://cdn.sqhk.co/gevajoke/dhgIROa/gem_td_heroes.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490370/normal_5ffd74933672e.pdfIn PDF document text
    • http://rafupofamurawaf.mygamesonline.org/70561249365.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456378/normal_60325a02d9785.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bugenerefajujus.atwebpages.com/23008841006.pdfIn PDF document text
    • http://wuwedilejom.myartsonline.com/what_does_guerrilla_warfare_mean_in_social_studies.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 7

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_off0000ff11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF11 3712 bytes
SHA-256: cb6a596150e980b6834ab5787a98963872912e09c3fd3b6d93ddc1b1950233af
font_01_sfnt_off00010c46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C46 5316 bytes
SHA-256: be81b7c029f24f8fbc467e5b5ca626cc2d12542df75bf8e6b754eb5e9c5e9394
font_02_sfnt_off00011e81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E81 10472 bytes
SHA-256: bd17d22460e70be31aed4e52f278a5a2fe837a3ed0f06155b5939628c02dd9dd

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