Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b89e46445276545…

MALICIOUS

PDF

72.7 KB Created: 2021-03-02 20:55:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 347c8f0361223cfd8023a0be5f1df86b SHA-1: 793d40bdaf751e3ada67ab3ef060a1f3483776a4 SHA-256: 0b89e464452765450ef9a74ff5650366544d0c7fbfd8734bd9990773be82c7a0
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains or link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were extracted, the PDF structure and embedded URIs are indicative of a lure to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://golowaki.ru/123?utm_term=big+green+egg+grill+for+sale+near+me
    • https://cdn.sqhk.co/ramowejub/fhfjjha/pokemon_magikarp_jump_event_guide.pdf
    • http://003-center.ru/bostitch_vertical_battery_pencil_sharpener_manual47wgw.pdf
    • http://talkme-news.info/maze_runner_la_rivelazione_film_streaming_itasegzf.pdf
    • http://losinglotterynumbers.com/tuvitijawa7gb3q.pdf
    • http://pek-24.cc/89054967550fomai.pdf
    • https://cdn.sqhk.co/wojipezusax/JhiigCf/college_football_championship_2020_time.pdf
    • http://nout-prokat.website/ticket_to_ride_europe_rules_stationszhalp.pdf
    • https://cdn.sqhk.co/xabovalizo/aAyHfGG/10163815187.pdf
    • http://xupazekawinan.iblogger.org/what_are_some_innovative_teaching_strategies.pdf
    • http://medway24.com/71400005223o1l0m.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://wotiputega.epizy.com/98826750916.pdf
    • https://s3.amazonaws.com/wegemebufojafak/beds_are_burning_tab.pdf
    • http://medelomozukomav.epizy.com/all_video_player_for_windows_7.pdf
    • https://s3.amazonaws.com/belapawerezuju/tagovowifemajazopanurir.pdf
    • http://zafuriket.rf.gd/29080883417.pdf
    • https://s3.amazonaws.com/mexesazaxasa/nadamedafukovobegikuf.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e035.bin
b75c5ee7fa65055a44083710b4ea5c74b77457b8be077a5a4f06e063a839c708
pdf-font-stream PDF embedded font (sfnt) at offset 0xE035 5136 bytes
font_01_sfnt_off0000f19f.bin
0ab0010e23b3d220a2e2b0d8bb7a8c06b3e68e56ef3f27833a505585d114c74b
pdf-font-stream PDF embedded font (sfnt) at offset 0xF19F 10520 bytes