Malicious PDF — malware analysis report

Static analysis result for SHA-256 1aac4b597f63258b…

MALICIOUS

PDF

92.5 KB Created: 2021-03-28 20:33:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 3e8fc737b6f6d06e787314ea61728821 SHA-1: c28f7bcea45a23408541369fa34f72c5a6d36db4 SHA-256: 1aac4b597f63258bfd799c8dd070fbf2fed5af5886d8d7ec77d0cb511bcc289a
146 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically pointing to a download lure for a novel. ClamAV detection and ML classification strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://pelibifir.ru/award?keyword=download+novel+you+hurt+me+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4478430/normal_5ff2b093ee0ad.pdfIn PDF document text
    • https://sinuvuliwazima.weebly.com/uploads/1/3/1/8/131871572/4266680.pdfIn PDF document text
    • https://kijabejinal.weebly.com/uploads/1/3/0/9/130969506/7901912.pdfIn PDF document text
    • http://circulyarkadigital.xyz/personal_development_plan_templatej2wsm.pdfIn PDF document text
    • http://trenolgia.buzz/what_is_the_cost_of_tableau_certifications5xy2.pdfIn PDF document text
    • http://badgesverified.com/804562304387c31y.pdfIn PDF document text
    • http://golden-bridge.pro/edgar_allan_poe_ghost_stories1utdf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4530846/normal_605b6a21aa8f7.pdfIn PDF document text
    • https://polalakenasi.weebly.com/uploads/1/3/0/8/130813885/giwupakujaxe.pdfIn PDF document text
    • https://cdn.sqhk.co/jigavozef/8uzXHGS/rapogipubudogi.pdfIn PDF document text
    • https://cdn.sqhk.co/digipexula/jghdjiv/kukabebejarogakit.pdfIn PDF document text
    • https://cdn.sqhk.co/gabunufu/GwpGzic/slice_of_life_pizza_delivery.pdfIn PDF document text
    • https://cdn.sqhk.co/dupezijetibi/yhh6hio/95561619718.pdfIn PDF document text
    • http://bosupena.iblogger.org/49718578103.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393041/normal_5fce8f2012395.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447464/normal_6022d94d30c84.pdfIn PDF document text
    • http://remontvorot24.com/jadikotb91uf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371025/normal_60527926ed151.pdfIn PDF document text
    • https://mefevujeloz.weebly.com/uploads/1/3/4/3/134317202/3413893.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c2b028c-292b-434d-8305-905a2b85c18d/samsung_c460fw_manuale_italiano.pdfIn PDF document text
    • http://wasidaf.epizy.com/schema_analisi_del_periodo.pdfIn PDF document text
    • http://gexovudin.rf.gd/crying_boy_meme_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9348ae18-47b7-4761-8f8f-e30f0f413c0a/99410414531.pdfIn PDF document text
    • http://gelifadewew.rf.gd/lugipaxoripotikizigasebo.pdfIn PDF document text
    • http://lofopeba.rf.gd/32634179644.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_off000129ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129EE 5356 bytes
SHA-256: 0cead9c0aa316153fedc8d6dd0b172959d60a394caf518dbc519b9c3c13f9387
font_01_sfnt_off00013c20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C20 12160 bytes
SHA-256: 73430404c088fd2966379340f94b6187771796b8cc0e99ed587e2360ef272233

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