Malicious PDF — malware analysis report

Static analysis result for SHA-256 44278ce96b6d995b…

MALICIOUS

PDF

87.4 KB Created: 2021-08-20 14:17:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7cb782b5d6af12a32ce125afc15e415e SHA-1: 87750f5c0d05d2885340823e1fc205629092fad0 SHA-256: 44278ce96b6d995bfe9d707203d3daff034c15f48fddca44317b1485208f4cc1
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious downloads. The heuristic firings indicate a phishing and trojan-like behavior, with ClamAV specifically flagging it as Pdf.Phishing.Trojan. No scripts were extracted, but the overall structure and URL distribution strongly suggest a phishing lure for malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9945

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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
  • 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://coretry.ru/uplcv?utm_term=god+of+war+2+ppsspp+android+free+download
    • http://beiwendq.com//data/attachment/file/mojerekajita.pdf
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160739ef0855f8---jubavugemajivukikigor.pdf
    • http://automsystem.com/UploadFile/file/20210627013041311.pdf
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/fadb4c347803d1b741b7eb1208626aa8/40965533912.pdf
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607c5b68c3555---xakufulejuzimuxas.pdf
    • http://apexnepaltravel.com/userfiles/file/6496461293.pdf
    • https://sysyanginguvenlik.com/uploads/files/wiratisativorowedivaxax.pdf
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c68a44bf787---75007191942.pdf
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f3ed97ddb0d---wujojidimakokolewodi.pdf
    • https://www.bosingels.nl/ckfinder/userfiles/files/40748142735.pdf
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/aaf4341a1d733058552ae589d9b13d81/91221548017.pdf
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/f3e0facf476ce93571885508460b69fd/sonewoxagipu.pdf
    • http://phantasos.org/userfiles/file/gexoxosugewidi.pdf
    • https://grandhotelbulgaria.com/userfiles/file/7928027975.pdf
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/8623364270320415fb25dd49533a6d46/63992313360.pdf
    • http://bige.vn/uploads/userfiles/file/kimoxodoliluwekagenu.pdf
    • https://nexusmediation.nl/files/wibexaxiparegewejekaxinep.pdf
    • https://orangcar.com/app/webroot/upload/files/88784160402.pdf
    • http://alituncer.com/userfiles/file/karazanoferafelufawej.pdf
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/9001244ac664a813167d4ec591b2e0d6/52620253222.pdf
    • http://prosquash.by/data/pipek.pdf
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/c7f888dd6ea1286ee82d07795f50d39e/rarululu.pdf
    • http://hkalc.com/userfiles/99087283224.pdf
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160aae5c6b741e---69448292650.pdf
    • http://louisefarmersmith.com/admin/ckeditor/ckfinder/userfiles/files/80067579274.pdf
    • http://assushop.com/userfiles/assushop.com/file/suxifiwiniwuwula.pdf
    • http://evola.it/userfiles/files/43005854898.pdf
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/6fd42e6edcde776015f8304f99744962/ketoxatujugeb.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3b9.bin
65f5b25f443de322a719040866e420445f5ea5574cb5926e5ad213ec52c74271
pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B9 16428 bytes
font_01_sfnt_off00011e33.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11E33 16792 bytes
font_02_sfnt_off0001364a.bin
593e0e8f6458e56ae79b9c332e1b1665cfee1adee134efa1fe6bdd6ee2da031d
pdf-font-stream PDF embedded font (sfnt) at offset 0x1364A 10640 bytes