Malicious PDF — malware analysis report

Static analysis result for SHA-256 89dafa94dbfd65a1…

MALICIOUS

PDF

84.5 KB Created: 2021-09-01 04:36:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: f760fa85cce2108506d1d002eaed0c5e SHA-1: 4137c105c661bcacbb1ce2d3d5c4a2575644b884 SHA-256: 89dafa94dbfd65a10b6ca8516fdf4094df80a78b460141b330d28d421a1ae928
156 Risk Score

Malware Insights

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

This PDF was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous links, many pointing to domains that appear to be compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users. The presence of these links indicates an attempt to lead users to external, potentially malicious, content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 http://loadcell.vn/Images_upload/files/migupejegupabefiziromi.pdf In PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/70b462785f3364c55726425591644a6d/89280449738.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160f1064832d43---84164459088.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/161051d7f8d6ca---poduwoduzidagukiverulom.pdfIn PDF document text
    • http://www.electricman.in/demo/frontend/web/uploads/files/tiraguvilasuwopatulogakak.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/1606c6cac83d7a---mesubivaxa.pdfIn PDF document text
    • http://sooclose.eu/upload/File/47534565035.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/fdnj7njl9ftjemms5lo548u2o5/sirariwizokikatobugif.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/pse8juh0hntgovutdpcabgumr0/nimafavunuminazu.pdfIn PDF document text
    • https://pinyardim.com/calisma2/files/uploads/sakekonunewipofodamakimab.pdfIn PDF document text
    • https://infotechsystemsonline.com/ital/www/img/file/gifefew.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f34ee04ba4---tuwakafom.pdfIn PDF document text
    • http://slp70.com/clients/873855/File/tamumezajewopimofu.pdfIn PDF document text
    • https://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160717fb64734c---1654385888.pdfIn PDF document text
    • http://apexnepaltravel.com/userfiles/file/bamesikefotironokawewoveg.pdfIn PDF document text
    • http://sbsinternationalschool.org/sbsisnew/userfiles/file/sirovivofomuwolavap.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/aa58b27b91d45775616b7c28918e5840/66690541846.pdfIn PDF document text
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/hfs8k5n0p856mvmm4h79qfon0l/98938693587.pdfIn PDF document text
    • http://coimbra.hu/uploads/ckfinder/userfiles/files/63374760563.pdfIn PDF document text
    • http://beiwendq.com/userfiles/file/pajena.pdfIn PDF document text
    • https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/cmr0dasmrsri1i5joog1rpikcf/xibuza.pdfIn PDF document text
    • http://pro-elec.ru/ckfinder/userfiles/files/69812729031.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=the+mandalorian+watch+free+onlinePDF 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_off0000e411.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE411 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fc28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC28 10620 bytes
SHA-256: dc916dbe1b185729cddd5e598dcb3289f84ed14a3ebb340370c342fcc0e9c95d
font_02_sfnt_off0001143b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1143B 17612 bytes
SHA-256: f12d65fcf59228ae5c99ac538c8b1f315c7a059160356607b038a190f78cf3ec

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