Malicious PDF — malware analysis report

Static analysis result for SHA-256 279f0d5eec98498a…

MALICIOUS

PDF

82.8 KB Created: 2021-06-07 16:36:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3a970c302664bff44fe7c10602d877be SHA-1: 8938857299443bf0ebd4995dbd65dddd9c6de5da SHA-256: 279f0d5eec98498af1d77731dffa4ffb2d2490ab6aa00f675662481730baf4ed
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting and are associated with link farms, indicating a phishing or malicious redirection 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.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://crewmak.ru/pbw?utm_term=honda+goldwing+2021+price+philippines
    • https://static.s123-cdn-static.com/uploads/4379233/normal_5ff675f5c476d.pdf
    • https://static.s123-cdn-static.com/uploads/4501632/normal_5fff7c1f26fda.pdf
    • https://cdn-cms.f-static.net/uploads/4401711/normal_60655017b6005.pdf
    • https://fifusikusivupe.weebly.com/uploads/1/3/4/6/134638905/6010082.pdf
    • https://cdn-cms.f-static.net/uploads/4420765/normal_6009e86f36b64.pdf
    • https://static.s123-cdn-static.com/uploads/4387243/normal_5ffc554bc4491.pdf
    • https://gonoloxezejuje.weebly.com/uploads/1/3/1/4/131410007/8a30aa41.pdf
    • https://juvivufoli.weebly.com/uploads/1/3/5/3/135325295/bokaderigole.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://barotidi.pbworks.com/f/cbse_class_6_maths_algebraic_expressions_worksheets.pdf
    • http://tisowowuduwe.pbworks.com/f/bally_5000_plus_slot_machine_manual.pdf
    • http://pobonagul.pbworks.com/w/file/fetch/144608553/what_to_wear_to_a_camp_counselor_interview.pdf
    • http://magogopowo.pbworks.com/f/sovilizafogujufipobazaw.pdf
    • http://zuvevetub.pbworks.com/f/lisuzetuzogodujekisepuji.pdf
    • http://dazokarodu.pbworks.com/f/12473615527.pdf
    • http://xutipofapu.pbworks.com/f/macbeth_act_2_scene_1_essay_questions.pdf
    • http://bokibagaror.pbworks.com/f/dagivonezuzaxirezum.pdf
    • http://barumena.pbworks.com/w/file/fetch/144461319/warhammer_40k_9th_edition_rulebook_download_vk.pdf
    • http://bojirakaj.pbworks.com/w/file/fetch/144424938/rajasthan_patrika_news_paper_today_in_hindi_barmer.pdf
    • http://pamotekegopa.pbworks.com/f/tubumezexoxaji.pdf
    • http://zuvevetub.pbworks.com/w/file/fetch/144422226/spoofer_pokemon_go_android_apk.pdf
    • http://zegakodas.pbworks.com/w/file/fetch/144623088/en_etkili_ak_ve_muhabbet_dualar_kitab_okuyanlar.pdf
    • http://tagexoba.pbworks.com/w/file/fetch/144422991/bahubali_3_movie_download_in_hindi_hd_720p.pdf
    • http://sijomirurefi.pbworks.com/w/file/fetch/144451110/como_crear_cuenta_de_netflix_1_mes_gratis.pdf
    • http://gajufabeke.pbworks.com/f/putipamalagolenosuret.pdf
    • http://fajopab.pbworks.com/f/what_credit_score_do_you_need_for_fingerhut.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_off0000fe6a.bin
cc8e0163014c3c1425865d810d0db2bce232a972ee494616969ad1575d9a1cc0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE6A 5712 bytes
font_01_sfnt_off000111ef.bin
cd34f8611792c0ed9b822d14ab3fd33b7caab22a8bf0d3c68fcb56f2d4225b86		 pdf-font-stream PDF embedded font (sfnt) at offset 0x111EF 12684 bytes

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