Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a0677fc30f31f96…

MALICIOUS

PDF

99.0 KB Created: 2021-06-17 10:54:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: e9cfc8bec6a758e8d7d8ab2172e76bcb SHA-1: 242d1f7190081f3f78e6344c90c2eaa3eb7fc98f SHA-256: 0a0677fc30f31f96d0c9eb223ecc608de7c0b95968db4d0456e93c40447ee7d4
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous links, many pointing to compromised WordPress sites, acting as a link farm to obscure the ultimate destination. The embedded content, though heavily obfuscated, suggests a lure related to 'Sword Art Online' to entice users to click on these malicious links.

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 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://laborke.ru/uplcv?utm_term=sword+art+online+kirito+x+yuuki PDF link annotation
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e6eed029b7---wemawerefuxik.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607746af342cd---zitini.pdfIn PDF document text
    • http://nadiadsa.org/userfiles/file/ranokevasijunudivomoxegig.pdfIn PDF document text
    • http://mbcasc.net/imgs/file/6703368500.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5830bb2e67---4749440916.pdfIn PDF document text
    • http://matras-devison.com/upload/file/midevetaved.pdfIn PDF document text
    • http://dungcubepgiangtrinh.com/webroot/img/files/75943484793.pdfIn PDF document text
    • http://photou.cc//ckfinder/userfiles/files/44294040294.pdfIn PDF document text
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/445b0ab5054c63fbfc448d6d42c79974/mopaxojipefo.pdfIn PDF document text
    • https://nnt52.ru/userfiles/file/66414022354.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/xalokixubirepeleduvelaze.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/323dkgc3p0autndshcsllivhtu/89967399562.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c6dbc2465c---94858841464.pdfIn PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/c13a66eed5b93899ce901dbd763b48c0/vaxumudikogovedese.pdfIn PDF document text
    • http://dekoblickfang.de/userfiles/file/tobaxewovenud.pdfIn PDF document text
    • http://brmhn.com/userfiles/file/20210514124705_yodgt5.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bef388452d6---11895460968.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a32036161c---7600986568.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000122fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122FE 6708 bytes
SHA-256: 8ae81a84c7c89e886419775d5a31495b263b424ab2174bed63ee412eb70c509e
font_01_sfnt_off000138bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138BF 4952 bytes
SHA-256: ce307f31ad0845474056b44b9c3e51d3389d8cabcb29f7c569930490e0595804
font_02_sfnt_off000149b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149B3 11588 bytes
SHA-256: 15dee978ada37fe68d74755570c0383784bbb9251888e68a285ca3beed1a87bd
font_03_sfnt_off00017045.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17045 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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