Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb6cd02c726596f2…

MALICIOUS

PDF

80.0 KB Created: 2021-02-15 21:49:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: efc90bc5b5eef2a32364455dd2e905b8 SHA-1: d754a2372ecb16cd76b87d0093171553e577a5c9 SHA-256: cb6cd02c726596f293d7d3a46313f96f133cacf61858243395cf24683c9a8c94
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or scam attempt. It contains numerous external links, with a primary focus on 'https://bologen.ru/strik?utm_term=marketing+executive+salary+in+saudi+arabia', suggesting a lure to a malicious site. The document body, though heavily corrupted, contains fragments related to salary information, reinforcing the phishing pretext.

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://bologen.ru/strik?utm_term=marketing+executive+salary+in+saudi+arabia PDF link annotation
    • http://powerpoint4you.ru/guided_meditation_on_impermanence6mtns.pdfIn PDF document text
    • http://mazers.fun/chale_aana_whatsapp_status_video_wapwonp7pbm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480594/normal_5fe9deb2445cc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484115/normal_5ffc473e508fb.pdfIn PDF document text
    • http://sport-stavki.fun/fimegorogepijaxifewvcfy1.pdfIn PDF document text
    • https://cdn.sqhk.co/birugafomafo/hefihia/at_t_smart_wi-_fi_extender_airties_4920.pdfIn PDF document text
    • https://cdn.sqhk.co/sojowidaz/jjdjdhb/dilute.pdfIn PDF document text
    • http://theharaka.online/you_will_be_found_sheet_music_musescore7kvab.pdfIn PDF document text
    • http://juwolopuga.66ghz.com/13465379760.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445320/normal_5fea464d61028.pdfIn PDF document text
    • https://cdn.sqhk.co/roziguze/fQjiFHo/fitixamazev.pdfIn PDF document text
    • http://extrameets.fun/19903366761jl4pw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kenozajawatulaw.rf.gd/working_of_biomass_power_plant.pdfIn PDF document text
    • http://xaligapuk.epizy.com/91496645669.pdfIn PDF document text
    • https://s3.amazonaws.com/rokuwapesu/21237275717.pdfIn PDF document text
    • http://lulikeleweworup.epizy.com/biblical_hebrew_syntax.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/blessing_of_baapu_song_hd.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_off0000f7a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A6 5548 bytes
SHA-256: 17dd00503bd09b573d4fef13c0e78db99456c1d9947826fca3cf59c6b172f744
font_01_sfnt_off00010aae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AAE 12020 bytes
SHA-256: e3616173d894a00362b1b40a4f0c6f34f81f0246ee03c0e7c57c193898a191ec

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