Malicious PDF — malware analysis report

Static analysis result for SHA-256 a74143acea3b1ddc…

MALICIOUS

PDF

80.9 KB Created: 2021-03-14 08:32:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: c14def78eadeb87221138de0f302139e SHA-1: f47c4915d20008c4df031e0a8ba548b3d05aa822 SHA-256: a74143acea3b1ddc30d27cbbece236c1fc6c3253345cf7d5a2d527b0e9bbf57d
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 designed to redirect users. The primary URL, 'https://gimoguvi.ru/strik?utm_term=why+my+lg+microwave+is+not+heating+up', suggests a phishing lure disguised as a search result. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

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://gimoguvi.ru/strik?utm_term=why+my+lg+microwave+is+not+heating+up PDF link annotation
    • https://cdn.sqhk.co/xogedusov/hjhTij5/werofelapuzololoj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383149/normal_603c549ab2f29.pdfIn PDF document text
    • https://cdn.sqhk.co/pemejurove/eEDiWja/naxamuganogadam.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403406/normal_600414936ff62.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450347/normal_601e644fee88a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486971/normal_5fc7ebe56c389.pdfIn PDF document text
    • http://dalosizofovabes.medianewsonline.com/how_to_install_operating_system_on_hp_pavilion.pdfIn PDF document text
    • http://nitiwomifigurod.mygamesonline.org/61606860483.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452389/normal_6019ced11f799.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369332/normal_5feceba715ff3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388629/normal_60394eb01166c.pdfIn PDF document text
    • https://cdn.sqhk.co/penunotati/ijbfgcg/64946401909.pdfIn PDF document text
    • https://cdn.sqhk.co/momujolo/gFhaqgd/nexijumubuwixuxudawu.pdfIn PDF document text
    • https://cdn.sqhk.co/lexelinowe/bv6Zeyw/tedefojitorowimoxitene.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416305/normal_601b8d26eafc9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474231/normal_604b42925a13b.pdfIn PDF document text
    • http://takovod.66ghz.com/manualidades_faciles_para_decorar_halloween.pdfIn PDF document text
    • http://zutatowatipo.mywebcommunity.org/oxford_grade_4_maths_book.pdfIn PDF document text
    • http://kopogaxepaku.sportsontheweb.net/denomawabuwodiwofusazuw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sowewazulejewi/ligujelugififopili.pdfIn PDF document text
    • http://mixokuwaj.epizy.com/synonyms_listen_to_mentor.pdfIn PDF document text
    • https://s3.amazonaws.com/sowirutelevolur/kebebowus.pdfIn PDF document text
    • https://s3.amazonaws.com/rizezobabub/riparian_management_area_guidebook_bc.pdfIn PDF document text
    • https://s3.amazonaws.com/muxegeza/literal_equations_coloring_activity_worksheet_answers.pdfIn PDF document text
    • http://tugosamerela.rf.gd/proctor_silex_3_qt_slow_cooker_recipes.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_off0000fbe7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE7 5616 bytes
SHA-256: bbbec68c4faf6e39eec11a52451b3cfcf502f2c8e614db8930fff42214ecbb6b
font_01_sfnt_off00010f03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F03 11340 bytes
SHA-256: e4db60891928480c42a1db43bc75aac0b2e5fcec53f0790e090a591017500c1f

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