Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bc3e96cb1201fa6…

MALICIOUS

PDF

84.8 KB Created: 2021-06-28 15:13:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 9c88d517073a7f225230b03561fd95b0 SHA-1: ef0d36d251d8fb01448e1c7219568e045948c1da SHA-256: 7bc3e96cb1201fa630e66b30a24db90577b71bd029ac2b6138966db5e225fbb4
164 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. The presence of a download button lure further supports the malicious workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • 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.
  • 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 http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/ruvidb5vg7pl56qm6faun2gd7m/makudefuwawa.pdf In PDF document text
    • http://gat-asset.com/CKEdit/upload/files/79736287433.pdfIn PDF document text
    • http://zaintik.org/files/galeria/files/keronudafuwizilan.pdfIn PDF document text
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/2def683353c8b1283550140d7c9c976c/15633362344.pdfIn PDF document text
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/7e7f2ab6c3eb6147e1261512ec05ee0c/bugiwibugumavafu.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/f69c77a50c5c264a09f8968528e05eb8/rabixujejinosumasagonulor.pdfIn PDF document text
    • https://nattasampun.com/upload/files/zorexamewujopolaw.pdfIn PDF document text
    • http://assushop.com/userfiles/assushop.com/file/52402289394.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f44a1612e9---73927189452.pdfIn PDF document text
    • https://prestinieurope.ch/userfiles/files/kaxadixopivub.pdfIn PDF document text
    • https://acronimocostanzo.com/userfiles/file/24538575506.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/9e64d18c701e197d14de3f18bf90e999/nifawopepisaganovupanofi.pdfIn PDF document text
    • https://cr2tek.com/userfiles/Proj_Name//files/62983481473.pdfIn PDF document text
    • http://archerelectricsupply.com/userfiles/file/vobojuxewu.pdfIn PDF document text
    • https://epiphanych.com/images/file/73713228044.pdfIn PDF document text
    • https://costabravas.com/uploads/localidades/files/tomepilijafo.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607833553fb98---9746815922.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3727c5c7c---kibigazegadidawamuvox.pdfIn PDF document text
    • https://bayardplaza.co.uk/wp-content/plugins/super-forms/uploads/php/files/849scn1truummunlffenfd931n/pikexilorarubis.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c19d17db519---2446757590.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/16072ceda7fa3e---76601595233.pdfIn PDF document text
    • https://anmoul.com/userfiles/file/mojafovedolo.pdfIn PDF document text
    • http://sarlampa.ru/upload_picture/16899721427.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=political+science+class+12+board+paper+2020+solutionsPDF 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_off0000e7fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7FC 11044 bytes
SHA-256: 25b467207a68e1c2c6da22cb989f412f5994e44b03b6ca616e8697ef9c3090e4
font_01_sfnt_off000101a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101A6 16988 bytes
SHA-256: 214006ffb756c63e657b80e909125c023813a5ba7cffcece921ff0be4876f285
font_02_sfnt_off00012dbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DBC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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