Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffb1455dbae057be…

MALICIOUS

PDF

88.3 KB Created: 2021-03-08 08:28:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 7fed64c6f542c3260b39c351cf148ac9 SHA-1: f2a5917f4190f4c48053d3f67c19aa5e2c8af3be SHA-256: ffb1455dbae057be73a0cfe2b86b8bbe10757cb120c1959a681c4a21dca2f5f4
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious sites. The presence of external URIs and the 'link farm' heuristic strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://ponafet.ru/strik?utm_term=casio+f91w+mods PDF link annotation
    • http://kitafoged.medianewsonline.com/56492225263.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383571/normal_5ff9481f51ccf.pdfIn PDF document text
    • https://kelulove.weebly.com/uploads/1/3/0/7/130775366/bedaturusebokav.pdfIn PDF document text
    • http://cyberghost.store/cisco_sg300-28p_specsj7c23.pdfIn PDF document text
    • http://innov-cis.net/hitmonchan_pokemon_sword_evolutionnx8hm.pdfIn PDF document text
    • https://cdn.sqhk.co/sovanoniwuva/gicygdh/93962450671.pdfIn PDF document text
    • https://vimopoferozure.weebly.com/uploads/1/3/4/8/134858925/7939304.pdfIn PDF document text
    • http://jiwapadenejeza.getenjoyment.net/take_5_oil_change_employee_reviews.pdfIn PDF document text
    • https://cdn.sqhk.co/jigavozef/gejdiic/great_vic_bike_ride_2019.pdfIn PDF document text
    • http://podipotekoi.ru/tmnt_2012_kiss_cartoonj8bhx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426409/normal_5fdb69a19a536.pdfIn PDF document text
    • http://goloszauniver.fun/zovizut61zv.pdfIn PDF document text
    • https://xetizokabonon.weebly.com/uploads/1/3/2/6/132696323/1a6550c7b.pdfIn PDF document text
    • https://cdn.sqhk.co/zamupefa/ihKhjjf/doom_eternal_walkthrough_exultia.pdfIn PDF document text
    • http://delinapod.mypressonline.com/2._what_are_the_reactants_and_products_of_cellular_respiration_and_photosynthesis.pdfIn PDF document text
    • https://xifasojole.weebly.com/uploads/1/3/0/8/130873801/wixeripa_wadamuribeli_buwuzuv.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/bisapovepizaj/40405945076.pdfIn PDF document text
    • https://s3.amazonaws.com/rixevozajixezos/accounting_education_journal.pdfIn PDF document text
    • https://s3.amazonaws.com/zerepuzuze/33424084360.pdfIn PDF document text
    • https://s3.amazonaws.com/tugabijenovili/26559148346.pdfIn PDF document text
    • https://s3.amazonaws.com/wuvepilamamuse/lazorirakakapebozik.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_off00011ddc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DDC 5128 bytes
SHA-256: bb76eb0ccbcd7649ad287cbb05e4be4553a4154315a1aaf17194b848e7d7f27b
font_01_sfnt_off00012f52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F52 10976 bytes
SHA-256: 637874ef08e8f22471e070281ea5d7567e9409b2ab0618a4ab0b80b1a32c1601

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