Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a97e94f9db741ee…

MALICIOUS

PDF

83.1 KB Created: 2021-04-07 01:44:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: da2cdee607fa741af0dae05fa637911f SHA-1: c74b213980bbdb6ff1b7369433d8360ccc1c55f9 SHA-256: 6a97e94f9db741ee7613e08061a82276c653bb3340466a94bd754350d08f7389
126 Risk Score

Malware Insights

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

The sample was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm or phishing lure. The PDF structure and embedded links are consistent with attempts to redirect users to malicious sites, potentially for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jumiwimov.ru/123?utm_term=water+pollution+sources+and+effects+pdf PDF link annotation
    • http://giwewigipebi.medianewsonline.com/berliner_platz_4_arbeitsbuch.pdfIn PDF document text
    • http://patajafurep.mywebcommunity.org/gate_electrical_engineering_books_free_download.pdfIn PDF document text
    • http://goossyy.online/radupobaohu4s.pdfIn PDF document text
    • http://linufiwanekume.scienceontheweb.net/descendants_3_audrey_s_diary.pdfIn PDF document text
    • http://zegererevez.medianewsonline.com/arterial_hypertension.pdfIn PDF document text
    • http://crispyset.online/fekirimikedukubcpfsk.pdfIn PDF document text
    • http://ludirobus.getenjoyment.net/93990846022.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424009/normal_600202d097dbf.pdfIn PDF document text
    • http://pupezawat.scienceontheweb.net/kingfisher_calendar_2020_free_download.pdfIn PDF document text
    • http://iwhite.space/risesobug5amau.pdfIn PDF document text
    • http://jeruwit.mygamesonline.org/legoxogis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424009/normal_5fe8fb2d8c60d.pdfIn PDF document text
    • http://motorutovibipe.sportsontheweb.net/anticipations_hg_wells.pdfIn PDF document text
    • http://tanijijud.sportsontheweb.net/side_effects_thyroid_hormone_replacement.pdfIn PDF document text
    • http://tokiridevifo.medianewsonline.com/94439748668.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426819/normal_600fb626a0d2b.pdfIn PDF document text
    • http://copyrightreports.com/temisabln6yq.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
    • https://uploads.strikinglycdn.com/files/9761ca0b-9471-4e8c-a0f1-d7a02f9fd001/dunkin_donuts_cream_cheese_nutrition_facts.pdfIn PDF document text
    • http://movasedumanepe.onlinewebshop.net/damodarastakam_in_sanskrit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86b76dfa-b1d6-45a5-80fa-ff0abaa90b4e/how_to_turn_a_photo_into_a_watercolor_painting.pdfIn PDF document text
    • http://gaxilitexu.onlinewebshop.net/seeds_to_plant_in_january_florida.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_off0000f7d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7D4 5044 bytes
SHA-256: 124642b01dac1f661f34750c5c236952724e462f82067658ee438d8ea5b1045c
font_01_sfnt_off0001090e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1090E 11072 bytes
SHA-256: 08e7a7193875fa2db563ac1ccef1845e5a7340fac959189123320c396d13b61e
font_02_sfnt_off00012eae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EAE 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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