Malicious PDF — malware analysis report

Static analysis result for SHA-256 a930e05ef80169b6…

MALICIOUS

PDF

70.8 KB Created: 2021-03-17 03:23:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 46c433f33476557396d51e3da2eb7e4b SHA-1: c676abaa5db6cdc04cb61a1eb180a0c2f671adbf SHA-256: a930e05ef80169b615872fd07d921d7b5b6ce110349206350863337c29ab1c88
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with `https://jumiwimov.ru/wix?keyword=marajade+sith+twitch` and `http://redtea.space/22511645276met9k.pdf` being particularly suspicious. The heuristic `PDF_SEO_DISPOSABLE_LINK_FARM` indicates the document is designed to host many links on disposable domains, a common tactic for phishing or distributing further malware.

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://jumiwimov.ru/wix?keyword=marajade+sith+twitch PDF link annotation
    • http://redtea.space/22511645276met9k.pdfIn PDF document text
    • http://linorusani.iblogger.org/how_to_stop_stihl_chainsaw_from_leaking_bar_oil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402737/normal_6037f13b163fc.pdfIn PDF document text
    • http://yourcy.com/243133142498coni.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455195/normal_5fe207abd1e7e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413373/normal_604e3fe2a7149.pdfIn PDF document text
    • http://kufejat.sportsontheweb.net/parasitologia_humana_neves_13_edio_download_gratis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383565/normal_5fe7514912829.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469852/normal_604568e043071.pdfIn PDF document text
    • http://awpmode.com/reglage_richesse_moto_4_cylindrevz7lk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385648/normal_60122234a6b6c.pdfIn PDF document text
    • http://xonitaj.mywebcommunity.org/92438856934.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407086/normal_5ffbf296ca4df.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pimizebogo.rf.gd/59089904026.pdfIn PDF document text
    • http://vajekalisafemun.rf.gd/hd_webcam_c615_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/prussia_empire_total_war_guide.pdfIn PDF document text
    • http://sidepojedava.myartsonline.com/how_to_use_element_roku_tv_remote.pdfIn PDF document text
    • http://wosakev.epizy.com/semicolons_and_colons_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/vabemavuputenif/el_saber_proscrito_alice_miller.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7CD 5168 bytes
SHA-256: e9f32f138883287362bd8fee8698284402ed987ef0d4c989243df55b7a20af43
font_01_sfnt_off0000e97c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE97C 10996 bytes
SHA-256: 2425b56a0e8f9c3c4c726daab69a6a12eca9a0ad6de429fcb11f98b800684a7c

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