Malicious PDF — malware analysis report

Static analysis result for SHA-256 094bb406cff34625…

MALICIOUS

PDF

76.7 KB Created: 2021-03-14 19:29:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 46c09a6526ddc53d7cd2a4a6221c2910 SHA-1: 4959561bda31e8a8dc666c279ec2ab19dd2e39d6 SHA-256: 094bb406cff346255503f042a656d762659348c272d9c11be69750e76b64a1e8
186 Risk Score

Malware Insights

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

The file is a PDF containing numerous external links, many pointing to disposable domains, indicative of a link farm or phishing campaign. ClamAV and ML heuristics confirm its malicious nature, specifically flagging it as Pdf.Phishing.Trojan. The embedded URLs suggest an attempt to redirect users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://dugedepap.ru/strik?utm_term=how+to+charge+kindle+when+battery+is+empty PDF link annotation
    • https://bawimivumo.weebly.com/uploads/1/3/4/6/134609907/3240925.pdfIn PDF document text
    • http://ooovseanalizi.ru/25143740320xs0js.pdfIn PDF document text
    • http://shop50off.info/40145671569m0onh.pdfIn PDF document text
    • http://trells.space/35784806519hrl37.pdfIn PDF document text
    • http://golden-charm.ru/33214867194qgc1t.pdfIn PDF document text
    • http://bachanalytics.com/biwirupododigaza8sesr.pdfIn PDF document text
    • https://bozuluxowefag.weebly.com/uploads/1/3/5/3/135349757/wizabuvexolape.pdfIn PDF document text
    • http://lnstagram-helping.live/duginobotorituj0d2dg.pdfIn PDF document text
    • http://outputqwvk.space/kitudot8nyb9.pdfIn PDF document text
    • http://justamorem.com/12236496559wm3av.pdfIn PDF document text
    • https://wokonupojelofa.weebly.com/uploads/1/3/5/3/135351156/zirosevexan.pdfIn PDF document text
    • http://copyright-central-media.com/lixanupofuedp6i.pdfIn PDF document text
    • http://sodahub.club/absentia_season_1_parents_guideirpms.pdfIn PDF document text
    • http://mybiol.site/14373145106hbnjq.pdfIn PDF document text
    • https://xigeworimejol.weebly.com/uploads/1/3/1/4/131483719/razedunaduge_belujexudonevo_gamir.pdfIn PDF document text
    • http://scoretdho.best/ue_boom_speaker_instructionsh0pji.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/db81b301-fc44-4d53-bb48-bb0ae95f3e83/digixanixigota.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40997c3d-00e4-4551-ab27-a3764401e925/widivimojasoti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf27b630-0429-49a7-a036-20b0f67599b0/gukosugidoxajelibiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f6d784a-2270-4483-ae79-11b755c7343a/mike_rose_i_just_wanna_be_average_summary_and_analysis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6978157-f6e4-408f-ac35-ff7aecc9dc7d/how_to_make_google_cardboard_vr_headset.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49cc28be-d168-4a67-af8a-ddeae75e7ac0/realtek_high_definition_audio_driver_download_windows_7_64_bit.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_off0000ea75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA75 5848 bytes
SHA-256: aa5435fa60693f3af7486bf825f446527ea8675593534ea91fe322d0ab8fcf92
font_01_sfnt_off0000fe41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE41 10940 bytes
SHA-256: 270ead044a4a732d6c4b370513d628ff499cd9fe530af48e2b2cd946248b7cd9