Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f34b69d10c4d88e…

MALICIOUS

PDF

72.6 KB Created: 2021-03-10 06:56:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 1936ce1f3f6b1c855c4c446ab530c5e1 SHA-1: a02e676db5c890ad8739925a54f997c2353dc669 SHA-256: 6f34b69d10c4d88e4606740e15af19e8961778e1d4aad9c84e7d746b105295d3
126 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a phishing or malware distribution scheme. The PDF's content, though heavily obfuscated, appears to be a lure related to 'door frame design', intended to trick users into clicking malicious links.

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://midufefew.ru/award?keyword=door+frame+design+pdf PDF link annotation
    • http://fitokaps.xyz/843584025268tgdg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497082/normal_5fe2939092f44.pdfIn PDF document text
    • http://snatural.space/mercruiser_4.3_mpi_specs9shh9.pdfIn PDF document text
    • http://accueilcmb.com/91553974548xlbdo.pdfIn PDF document text
    • https://vezutokabev.weebly.com/uploads/1/3/4/7/134758566/5117197.pdfIn PDF document text
    • http://potawuzaj.medianewsonline.com/40669681746.pdfIn PDF document text
    • https://tenabawik.weebly.com/uploads/1/3/2/7/132710661/9731019.pdfIn PDF document text
    • http://topstop.site/best_cheap_android_car_stereo_2019ry2ry.pdfIn PDF document text
    • https://pulijapejupexeb.weebly.com/uploads/1/3/4/0/134041872/a96889b1da3d02.pdfIn PDF document text
    • http://bionatur.space/drivers_ed_permit_test_answers_floridacwdn4.pdfIn PDF document text
    • http://edapog.online/64915823495h8b95.pdfIn PDF document text
    • http://lnstagramverifiedsbadgeform.com/romolopokapafizawenabdhq95.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418987/normal_5ff5d04637dea.pdfIn PDF document text
    • http://vidclips.design/76742234068e7fx4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385424/normal_5fe1ce086ee99.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404502/normal_5fdc155ca8725.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376852/normal_600eba176176c.pdfIn PDF document text
    • http://xulubapatoso.scienceontheweb.net/chick_fil_a_honey_roasted_bbq_sauce_nutrition.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/tixedujegibex/blood_bowl_2_mods.pdfIn PDF document text
    • https://s3.amazonaws.com/widuxade/java_jre_1._8._0_101.pdfIn PDF document text
    • https://s3.amazonaws.com/sixolose/fawaku.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/reference_sheet_template_word.pdfIn PDF document text
    • http://dozopedatofol.atwebpages.com/90415132419.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_off0000de32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE32 5328 bytes
SHA-256: 4c452d662c0dae866c543560a02aec10215fe1aea17f2dcecefd2d0b02f50c8e
font_01_sfnt_off0000f043.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF043 11100 bytes
SHA-256: 4e3864e1dd48b5f165a5d523e9d71b44e4775a28b08946441801dd8ccae47918

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