Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed6f9f522e1e6152…

MALICIOUS

PDF

72.9 KB Created: 2021-03-04 19:15:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: e569f474b972f5241d8c13f9c643f742 SHA-1: e3bfe78fff4b7d20cd155eb53918c5a733cee6eb SHA-256: ed6f9f522e1e6152069e3eff354223143666c2cea13361bf9cfab40599945637
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The document functions as a link farm, embedding numerous URLs that point to disposable hosting domains, likely to distribute further malicious content or conduct phishing operations. The presence of many external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://xajibur.ru/wix?keyword=destiny+2+shuro+chi+guide PDF link annotation
    • http://fepemewavitik.66ghz.com/bear_down_arizona_sheet_music.pdfIn PDF document text
    • https://cdn.sqhk.co/linidivez/cM2ibgd/hide_and_seek_biscuit_cake_without_baking_powder.pdfIn PDF document text
    • https://rebejudan.weebly.com/uploads/1/3/5/3/135316845/jufolomemesagasaze.pdfIn PDF document text
    • https://nipetetoxijekuj.weebly.com/uploads/1/3/4/7/134718304/sisajekavaxonilur.pdfIn PDF document text
    • https://cdn.sqhk.co/mizogujuzo/gd4AAuq/90296923036.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvexajamu/ingcASr/world_conqueror_3_50_conquest.pdfIn PDF document text
    • https://cdn.sqhk.co/gobuwovuv/L3E4icZ/teted.pdfIn PDF document text
    • http://phillipen.online/fagor_rapid_express_pressure_cooker_reviewsjiino.pdfIn PDF document text
    • http://driveformclanemilwaukee.com/spirit_adventure_tec_bootsi7o5b.pdfIn PDF document text
    • https://wovipoxutoluku.weebly.com/uploads/1/3/1/3/131383624/c44868.pdfIn PDF document text
    • https://xejukosaxup.weebly.com/uploads/1/3/1/4/131437924/lubiredap-bamawemobijiliz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8860adff-7f0b-4cf3-a358-cdd560dff136.filesusr.com/ugd/625844_9f065036e5af40d7b188cb369c3e940f.pdf?index=trueIn PDF document text
    • https://33edd578-4186-4695-89f3-f56a5a23fc53.filesusr.com/ugd/f17c08_727c720b89214f67a6cdaa2dd80898b3.pdf?index=trueIn PDF document text
    • https://580b68e3-2104-4118-ae5b-4f285de1c062.filesusr.com/ugd/dad7b5_4cf4583012d5459e8506e89af6f793ee.pdf?index=trueIn PDF document text
    • http://tasifomarefid.rf.gd/mental_strength_sports_books.pdfIn PDF document text
    • https://5a1138df-423b-4a5d-a7c7-36223740754e.filesusr.com/ugd/a72fa8_ce860c4870e04ec9b8a12d5575b20747.pdf?index=trueIn PDF document text
    • https://af18ad75-7652-4b25-b9e0-8da5fded0af1.filesusr.com/ugd/529385_ec977a7344af4c00a06c345cf4eb550d.pdf?index=trueIn PDF document text
    • http://laxizal.epizy.com/how_to_redeem_staples_rewards.pdfIn PDF document text
    • http://ninefaniki.rf.gd/37589982009.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_off0000e23e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE23E 5192 bytes
SHA-256: 0b804ee9af11e417f9be8357306933b3715e30c351564b832d2c23e06ab1bf08
font_01_sfnt_off0000f3f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3F5 10156 bytes
SHA-256: 11246ae8e8a1837b710588b1019ade9fa4ab2d9abc93938b5be1c2a71ed3fb3d

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