Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a6d0768373bb896…

MALICIOUS

PDF

88.2 KB Created: 2021-07-14 04:45:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: fed69a747ad456e4533d1236295e4b9f SHA-1: 1ff726322662c4bb730989980cc24ef69419250e SHA-256: 6a6d0768373bb896cef891afed68054fdd16048fa1f43ae37bf5015cdff25ada
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous external URIs and link farms pointing to potentially compromised websites, suggesting an intent to redirect users to malicious content. The presence of multiple PDF link farm heuristics indicates a strong likelihood of this document being used for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 6

  • 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.
  • 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://drafthe.ru/uplcv?utm_term=meaning+of+institutional+design PDF link annotation
    • http://thefarmatarapahoecounty.com/userimages/21944780290.pdfIn PDF document text
    • http://dptour.net/bot/ckfinder/uf/files/garuvisivegadawaf.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/abf485b51e52c89e66d2cb64a9e4e57b/safigiburinijoposuminuf.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160db8e9e536a8---lokar.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/0b939392128b1c393d8d631a4db8261f/2856417297.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/7a0022aa12d989b8ecb8b8808d2ebb84/rotufenadowuvunorud.pdfIn PDF document text
    • http://fredericjean.net/oplusco/file/27642024021.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608285d2d0002---91172961172.pdfIn PDF document text
    • http://accronline.com/userfiles/file/41837633493.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/eog5lh73s7cljm8of3b0c9kde0/76496977376.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/97513a1cb62bf57ca7c976b94e7d151a/sabumijenegiruwuso.pdfIn PDF document text
    • http://orosweb.hu/ckfinder/userfiles/files/goxabutefegeraveg.pdfIn PDF document text
    • http://www.southforconstruction.com/frontend/web/ckfinder/userfiles/files/fojerafufatufelameju.pdfIn PDF document text
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/tinumojemuzefitenedid.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/fuhs783851ured3ajbf39bv4p6/13367206936.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a07fa64b877---lexejikorodelenetisasob.pdfIn PDF document text
    • http://parvazyab.net/basefile/api203/files/57468541260.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/75ea1a9638610188665d8d78ed4a1b4e/lusebemux.pdfIn PDF document text
    • https://ratsimae.eemedia/contents/file/vifuzifomaz.pdfIn PDF document text
    • http://jikaramen.com/uploads/files/sikoxidenagidirotusire.pdfIn PDF document text
    • http://kapli74.ru/upload_picture/39536470545.pdfIn PDF document text
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/gn4v1d990q7iifci4r8rauvub4/46591252635.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3afb3c786---43956788844.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_off0000f7c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010fdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FDB 17156 bytes
SHA-256: 122b9f554286f0b8d51503c16d2868a5bae4263acd0b315be27248dbcb4ec048
font_02_sfnt_off00013b90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B90 10520 bytes
SHA-256: c3f2343ab95fa1d54c04f017caa9e61c8fc2bb82e9a327d8188d9055f828c32e

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