Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dc72f79e8ed8d82…

MALICIOUS

PDF

76.9 KB Created: 2021-03-29 04:01:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: cf356677f167ba2d8171986cd5e180dd SHA-1: 291d5bb0196e964312a532b79756d288e8b94ad3 SHA-256: 2dc72f79e8ed8d82ee495cdf48252643bd63691cfa4aada4155e5417262a08de
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and is flagged as a link farm on disposable hosting, indicating a malicious intent to redirect users. The ML classifier and ClamAV detection strongly suggest this PDF is malicious, likely serving as a lure to phishing or malware distribution sites. Although no scripts were explicitly extracted, the PDF structure and URI patterns are indicative of malicious redirection.

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://fokemale.ru/strik?utm_term=what+does+it+mean+to+build+evenly+in+monopoly PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4489732/normal_6042da36cd088.pdfIn PDF document text
    • https://cdn.sqhk.co/naziwixolagu/CC9gghb/pennsylvania_game_commission_doe_license.pdfIn PDF document text
    • https://vezitiratad.weebly.com/uploads/1/3/1/8/131856143/750018ac97c.pdfIn PDF document text
    • http://bomaduworofa.medianewsonline.com/45838812084.pdfIn PDF document text
    • https://zolekifez.weebly.com/uploads/1/3/4/8/134850144/turoxob_zajifakepizeku.pdfIn PDF document text
    • http://zoxatib.iblogger.org/best_star_finder_telescope.pdfIn PDF document text
    • https://cdn.sqhk.co/bepasasa/jeDigDr/yeezy_supply_350_zebra.pdfIn PDF document text
    • https://gafeziluwer.weebly.com/uploads/1/3/4/3/134310472/9a7d3248b685.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478402/normal_6008de8fb072d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413111/normal_5fd7bc8a568ef.pdfIn PDF document text
    • https://cdn.sqhk.co/fukonovum/gfshdAA/world_war_11_dates.pdfIn PDF document text
    • https://cdn.sqhk.co/fagaluwozez/jbLCY2z/chemguide_complex_ions_origin_of_colour.pdfIn PDF document text
    • https://tenogamux.weebly.com/uploads/1/3/2/6/132681545/sunef-wimazu-jusarisume.pdfIn PDF document text
    • http://mizafaroremida.getenjoyment.net/how_to_drain_lg_smart_drum_washing_machine.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465924/normal_600835990b098.pdfIn PDF document text
    • https://cdn.sqhk.co/wavojuxokino/gidjifH/65842384180.pdfIn PDF document text
    • https://varusotefus.weebly.com/uploads/1/3/1/3/131398431/8122234a0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wutejaxevewef.myartsonline.com/vitepa.pdfIn PDF document text
    • https://s3.amazonaws.com/tarajix/microcontroller_8051_interview_questions_and_answers.pdfIn PDF document text
    • http://pixagese.rf.gd/62672498587.pdfIn PDF document text
    • https://s3.amazonaws.com/sulasatevirexo/badley_practical_seismic_interpretation.pdfIn PDF document text
    • https://s3.amazonaws.com/julexekubaj/zalal.pdfIn PDF document text
    • http://sipanokule.onlinewebshop.net/could_be_better_synonym.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_off0000ec53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC53 5420 bytes
SHA-256: 5da16bbd84114f1d854f572ff3cbfef361423819a21566d666c6290d9942acc6
font_01_sfnt_off0000feab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEAB 11504 bytes
SHA-256: ea275ca936d058099f04bbc32d5461978ad9ee8ab4034405f352916549e73152

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