Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e6c2c5282761533…

MALICIOUS

PDF

83.8 KB Created: 2021-09-16 22:45:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 2c4d5a619bb49e1ef281f5ea9011ae8e SHA-1: 104d78a1c789e35d8726d0bb3a0933a938ee9ac5 SHA-256: 9e6c2c52827615336ff83378a44a4a7586dde6116a0de0a4b92e9b5c3d7b5473
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external resources, many hosted on compromised websites, suggesting a phishing or malware distribution attempt. The presence of a 'Password-protected archive handoff' heuristic indicates the document likely instructs the user to open a password-protected file, a common tactic to evade gateway security. While no scripts were explicitly extracted, the ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or trojan delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cfeb1692a3---6714700019.pdf In PDF document text
    • https://a-1commercialkitchenservices.com/ckfinder/userfiles/files/dinijadanulivekak.pdfIn PDF document text
    • http://mercuresamuichaweng.com/admin/file/37047029469.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/16133453931e98---jekenodiwe.pdfIn PDF document text
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/2373940d224167ccb7c0b3b41594f1ab/97524833891.pdfIn PDF document text
    • http://theponghop.com/upload/files/54814471081.pdfIn PDF document text
    • http://pluimveebeurs.com/userfiles/file/77010825252.pdfIn PDF document text
    • http://hotelrefah4ter.ir/basefile/hotelrefah4terir/files/jovomuxusasisivodine.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/f6fc1aa4ac25e04e49e1eafff8662955/7879952963.pdfIn PDF document text
    • http://pharmabiosolutions.com/filespath/files/20210913204544.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/cq54j3fgvdq2bsnk2fqqcefkap/niximazisabevelupinujiwuv.pdfIn PDF document text
    • https://indiachristian.org/uploads/files/29991580565.pdfIn PDF document text
    • http://thienminhgroup.com/uploads/userfiles/file/jatodidonagunigej.pdfIn PDF document text
    • http://dungcumaymoc.com/Images_upload/files/17442074805.pdfIn PDF document text
    • http://bjdfszwy.com/filespath/files/20210912145728.pdfIn PDF document text
    • http://pastadimatteo.com/ckfinder/userfiles/files/27459160689.pdfIn PDF document text
    • https://mkontroll.hu/File/pawizatexovatetar.pdfIn PDF document text
    • http://studioriggio.it/userfiles/files/vaxeketebolex.pdfIn PDF document text
    • http://benthanhsgfarm.net/images/uploads/files/57806759113.pdfIn PDF document text
    • https://unitjaya.com/contents/files/pukozanelipixalilovigeso.pdfIn PDF document text
    • http://sungder.com/upload/lurufepebomorifotubage.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/skg0gdvotbukbrmsckap7hgr57/nasumodowomab.pdfIn PDF document text
    • https://momsgardenfoods.com/ckfinder/userfiles/files/lufanefawusa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=adb+pattern+unlock+toolPDF link annotation
    • 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_off0000e03b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE03B 10560 bytes
SHA-256: dcffcf8fb9ce06fda7142a115c52fd08149769289cfc931224a7c06d96ce2418
font_01_sfnt_off0000f83b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF83B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001104d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1104D 19072 bytes
SHA-256: 5c50d4f74c9e8dcd8dca3c7ec14fdc7aaccee93c62eb7b6daa57e150e9cf8be2

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