Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fcc94026b6aa77f…

MALICIOUS

PDF

86.8 KB Created: 2021-08-15 09:04:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: cf1a5e224b522fcc47e981c66185d7e2 SHA-1: bdb0445ae87c11e9ad6ae911003b6e69f2cd569f SHA-256: 9fcc94026b6aa77faac691770eae707921ac6b4940a7515080674693838d0fa3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It functions as a link farm, directing users to various compromised websites and disposable hosting domains, likely to facilitate the download of further malicious content. The embedded URLs and the heuristic findings strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://krisoc.ru/uplcv?utm_term=download+dragon+ball+z+budokai+tenkaichi+3+mods+ps2 PDF link annotation
    • http://urbanconstructions.org/images/uploadedimages/file/kokugifijopiki.pdfIn PDF document text
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/5a328e812c1739310f8ff6ebcb74af78/2509434021.pdfIn PDF document text
    • http://mikailang.net/userfiles/file/20210505001023_1200764140.pdfIn PDF document text
    • https://gtnet-engine.com/ckfinder/userfiles/files/dirixi.pdfIn PDF document text
    • http://digimaap.com/wp-content/plugins/super-forms/uploads/php/files/4l4f1k44v5g1e3afcirasq1nmv/luridugovagep.pdfIn PDF document text
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c819e821cb---bugujil.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3ee5053be5---94085454181.pdfIn PDF document text
    • https://www.bussmann-tiefbau.de/ckfinder/userfiles/files/bedifinutilode.pdfIn PDF document text
    • http://ats-dz.com/userfiles/file/sexadasuvexog.pdfIn PDF document text
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/f207fbd4e43dae89118f8c6e72d23ca5/96754380148.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607f5fe02b3cc---87266948738.pdfIn PDF document text
    • http://exito-opakowania.pl/userfiles/file/12993386498.pdfIn PDF document text
    • https://pointswestliving.com/ckfinder/userfiles/files/89781113311.pdfIn PDF document text
    • http://chunmianxian.com/upfolder/e/files/20210624195839.pdfIn PDF document text
    • https://kaptenhoki.com/contents//files/7405120105.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080a5acb9d01---sazemoxizafedagigedel.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/160caadb082aab---1285240998.pdfIn PDF document text
    • http://murasakijr.com/uploads/files/duvajajezodenejebozurum.pdfIn PDF document text
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/0d95a42903c1031292f729a850293b92/33364075144.pdfIn PDF document text
    • http://articolo17.it/siti//usr/foto/files/34543955635.pdfIn PDF document text
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/k0fqcmvqi2rpevren2ou46n0fr/72361272483.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://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_off0000eb45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB45 17624 bytes
SHA-256: edfc99652457f5b406bc4deb91f95caa83c6ca5417b232f1b337a8b6e4c510ec
font_01_sfnt_off000119bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119BD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000131d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131D4 11732 bytes
SHA-256: 0d251746686a88cb42baf0c5288ef31aea848b5a52c7f2870546301779be95cf

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