Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ee4a4152ec173fb…

MALICIOUS

PDF

101.6 KB Created: 2021-03-29 12:23:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d5d7f44a68983dfac874b08ff3c696b6 SHA-1: 95b34ed5a3c8169f3c32e6f08433fd112a7eb2b4 SHA-256: 0ee4a4152ec173fb6a72682dfc421cfc71b64633b0c2fcd914263aa9c6b77171
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://dugedepap.ru/123?utm_term=pte+listening+test+with+answers+2018 PDF link annotation
    • https://cdn.sqhk.co/nanagajog/jjfBOZL/monster_battle_royale_sneak_attack_squad_vs_halloween.pdfIn PDF document text
    • https://cdn.sqhk.co/medujebukoma/y9geMQO/shooting_showdown_2_hack_apk.pdfIn PDF document text
    • http://fitdieta.com/chemical_bonding_exercises_with_answersx3c7h.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401538/normal_6030f7e31c7b3.pdfIn PDF document text
    • https://cdn.sqhk.co/kogoruzojif/dIAcGjc/gwent_the_witcher_card_game_all_cards.pdfIn PDF document text
    • https://cdn.sqhk.co/misusulebix/GWjjqgh/83189931089.pdfIn PDF document text
    • https://cdn.sqhk.co/bepoweruga/DRjcigg/libegigoxujedibobironem.pdfIn PDF document text
    • https://cdn.sqhk.co/bitowiso/hgjigfg/wofowe.pdfIn PDF document text
    • http://boraguw.medianewsonline.com/ich_guidelines_for_analytical_method_development_and_validation.pdfIn PDF document text
    • https://cdn.sqhk.co/sipebesoxu/gjpcJjg/tozogivubimafoduvoge.pdfIn PDF document text
    • http://gakagebir.mypressonline.com/rigewasobat.pdfIn PDF document text
    • https://cdn.sqhk.co/xuwadezab/2hjDKhb/tirulimawerazajaxuf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455178/normal_603e726565bfc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443356/normal_604e174d592db.pdfIn PDF document text
    • https://cdn.sqhk.co/fubafonu/Z2giIYE/girixipiwomiv.pdfIn PDF document text
    • https://cdn.sqhk.co/visukodo/Yvlfgfr/autoedge_glasses_guide_login.pdfIn PDF document text
    • http://tamodemuror.getenjoyment.net/zifoboz.pdfIn PDF document text
    • http://spencermcman.us/giganapawelukozinabatiauwis.pdfIn PDF document text
    • https://cdn.sqhk.co/tuxonewebuke/AifzgjC/22878608810.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463529/normal_604b2dab7433e.pdfIn PDF document text
    • http://xitabijasava.getenjoyment.net/operating_system_concepts_9th_edition_solution_manual_free_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374953/normal_5fc9f6004d0f9.pdfIn PDF document text
    • https://cdn.sqhk.co/dowivita/fiVjRhc/zaluboranu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://sadoboxijowem.myartsonline.com/how_to_install_arcgis_10._5.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013d00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D00 5240 bytes
SHA-256: 800ceb136be11f2bbb0cd7610959d2abf32091e2d4d7b38500b768e612b89990
font_01_sfnt_off00014ec0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EC0 12220 bytes
SHA-256: 14e4543f5e6bbc644dfaa8d7680d628837aa447374c825d0004476958992bcdf
font_02_sfnt_off0001783f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1783F 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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