Malicious PDF — malware analysis report

Static analysis result for SHA-256 28e58ccf227d2a8a…

MALICIOUS

PDF

64.4 KB Created: 2021-02-27 04:40:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: e26b1351437c2cfb234ba2c02fad3a2a SHA-1: a93b741755b83c83a643973a22f925aa62f5aa11 SHA-256: 28e58ccf227d2a8a31db98d089b627ab689eece4740e5d652953804e7702e3c2
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded URLs that lead to known phishing and disposable hosting domains, indicating a phishing or scam attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing lure, likely attempting to redirect users to malicious sites for credential harvesting or malware delivery.

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
  • 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://nipisod.ru/award?keyword=12+steps+pdf+download PDF link annotation
    • http://goloszauniver.fun/supprimer_compte_appli_gmail_android7u4tl.pdfIn PDF document text
    • https://namikefazexu.weebly.com/uploads/1/3/1/6/131606603/gebaseguj_lovonamer.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387929/normal_5ff1b1a89db85.pdfIn PDF document text
    • http://fortuneo-enligne.com/stickman_shadow_jailbreak_prison_escape_game_3d_download2v253.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447107/normal_5fe385fd49f29.pdfIn PDF document text
    • http://front-glass.space/kenwood_ts_440_manual_servicekoze6.pdfIn PDF document text
    • https://vaxatimiroxak.weebly.com/uploads/1/3/4/6/134617636/mubabizo_kurawobit.pdfIn PDF document text
    • http://copyrightproblem.com/zidotedag7k7e.pdfIn PDF document text
    • https://fanamiwa.weebly.com/uploads/1/3/4/0/134013174/kezusigisajokolip.pdfIn PDF document text
    • http://besemafobekilir.22web.org/faber_piano_adventures_level_1.pdfIn PDF document text
    • https://kiteginizi.weebly.com/uploads/1/3/1/8/131871518/211556.pdfIn PDF document text
    • http://rabisoluvilava.iblogger.org/59990087119.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://girupesoja.rf.gd/cartoon_videos_for_childrens_free.pdfIn PDF document text
    • http://kopolug.myartsonline.com/gatetufesozunedeve.pdfIn PDF document text
    • http://zaxalamel.rf.gd/refasesukobogewede.pdfIn PDF document text
    • http://toxukanubevaga.rf.gd/largest_law_firms_in_nj.pdfIn PDF document text
    • http://diverozisutujew.epizy.com/68139316454.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_off0000c0ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0CE 5120 bytes
SHA-256: 78184b80bfe8659be5370823622a5193fd753910f12784ca22010730ba2af47a
font_01_sfnt_off0000d268.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD268 10096 bytes
SHA-256: 5391454501812f8701950d4f295df3ec8d97a4bdfabbb0e2e751f5bb70627784

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