Malicious PDF — malware analysis report

Static analysis result for SHA-256 80e20296143d3218…

MALICIOUS

PDF

84.3 KB Created: 2021-02-06 20:49:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: f49f2055dac17ff3909430c44fc7f6c6 SHA-1: 13ed6e424422c53c60a5d584c207d0fdd76b88d3 SHA-256: 80e20296143d3218e78738988ca12459cf8b5da58aad5189343825bcc819b686
192 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical finding for linking to known malicious redirector infrastructure. The presence of a 'download button' lure and numerous embedded URLs, some pointing to disposable hosting, strongly suggests a phishing or malware distribution attempt. The ML classifier also assigned a very high probability of maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://yafferge.ru/aws?utm_term=gb+whatsapp+latest+version+december+2018 In PDF document text
    • http://jumovuv.22web.org/tanunekanapu.pdfIn PDF document text
    • https://cdn.sqhk.co/bafesugoguwi/W5V1mFp/runescape_halloween_2020_eve.pdfIn PDF document text
    • https://fujovufizopi.weebly.com/uploads/1/3/2/7/132710671/diniwibadak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380411/normal_6016457e8dd7c.pdfIn PDF document text
    • https://jimigafekalese.weebly.com/uploads/1/3/1/4/131407537/datumo.pdfIn PDF document text
    • https://cdn.sqhk.co/fugolamudara/ghjgghe/civ_5_no_expansions.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485308/normal_5fee468483667.pdfIn PDF document text
    • https://cdn.sqhk.co/felegabiw/iegdBhb/lathe_machine_diagram_with_parts_name.pdfIn PDF document text
    • https://cdn.sqhk.co/gufezitaxato/QNhhji8/34027344272.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420911/normal_5fe245beb9fb9.pdfIn PDF document text
    • https://gakulenem.weebly.com/uploads/1/3/1/4/131437742/fujefagogexoven_retutebotifela.pdfIn PDF document text
    • https://vakenufepuxino.weebly.com/uploads/1/3/4/5/134529081/januxezajobo.pdfIn PDF document text
    • https://cdn.sqhk.co/fujotojaxob/q1gdZhe/firipofezubugimarojafani.pdfIn PDF document text
    • https://cdn.sqhk.co/sozaxejiv/5vCYgh9/50613054854.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bejopirobi.epizy.com/latest_bengali_hd_movie_720p.pdfIn PDF document text
    • http://redariwim.rf.gd/37547299092.pdfIn PDF document text
    • http://giwalawap.epizy.com/14956741518.pdfIn PDF document text
    • http://sowiveporumege.epizy.com/69206065865.pdfIn PDF document text
    • http://golofupatawef.epizy.com/organelles_in_eukaryotic_cells_worksheet_answers.pdfIn PDF document text
    • http://pulilidason.epizy.com/80003697841.pdfIn PDF document text
    • http://solazagu.epizy.com/pubamujivilifiru.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2DB 6156 bytes
SHA-256: 9be9e56b45f474042047901c93f6cad7baca8c3dd39b425bc38d304e8707b76e
font_01_sfnt_off000107b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107B9 10784 bytes
SHA-256: 4015c6bccd11f380d8a832d065dbeb5957b3f052e53ee8f09abb65c5aeead891
font_02_sfnt_off00012cb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CB5 16580 bytes
SHA-256: f5420ed261ae481df7b700ba699e0fe10da3036d0ec0224bc8f3f79567a45a4c