Malicious PDF — malware analysis report

Static analysis result for SHA-256 7010ce341c1ac527…

MALICIOUS

PDF

83.6 KB Created: 2021-09-04 10:53:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 892c5096aab0d3ff854e82bbed6808d7 SHA-1: 43b4396d5be7797d0430a5f0324dd16b950f2b5d SHA-256: 7010ce341c1ac527e6b6e803b77a7e15caae14fb193a3ad93d3fd69caaffd0d5
156 Risk Score

Malware Insights

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

This PDF sample was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs that point to compromised websites and disposable hosting, likely to distribute further malicious content or lead users to phishing pages. The presence of multiple external URIs and link farm heuristics strongly suggests an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://pistant.ru/uplcv?utm_term=binary+options+free+pdf PDF link annotation
    • http://khlongtoei-nfe.com/library/userfiles/file/roretugerizikusozetawul.pdfIn PDF document text
    • https://adeptos.clevercloud.pt/images/items/files/31089138543.pdfIn PDF document text
    • https://vidaleve.net/ckfinder/userfiles/files/tubawidapupumalivum.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/f4a5294b907dd559dccc7984f4c07e5e/kutawovevog.pdfIn PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/3d1fda89bb3ab82acdfa127543efce52/87864837965.pdfIn PDF document text
    • http://vamaconsulting.sk/userfiles/file/84357771663.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/f236323c6d55a336a04a8ad166f26a8b/sarevejatibus.pdfIn PDF document text
    • http://dent-pro.cz/pic/file/foxuponodapiwoxanukabuf.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/1609b79ff0d1ae---60353578383.pdfIn PDF document text
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/ae9bc09893563f7a0badeedb0b58aef3/27065573536.pdfIn PDF document text
    • http://soflocops.com/clients/67403/File/dituzewiluvogobosilavisi.pdfIn PDF document text
    • http://cauthangdep24h.com/upload/files/fubigufuguzibav.pdfIn PDF document text
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160960262201f6---nivonijodiga.pdfIn PDF document text
    • http://yongqingtech.com/d/files/89389690589.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9662219110---nagesijaka.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160971c0070bfa---76139520663.pdfIn PDF document text
    • http://www.premiumimport.nl/ckfinder/userfiles/files/64188399781.pdfIn PDF document text
    • http://www.deco-interieure.com/userfiles/file/katerusewobidazujelikibob.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ee20432f367---damuverofekamitinuxam.pdfIn PDF document text
    • http://brukbet.com/user_images/file/80558251283.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bbdd82d9bad---pejesuvojisabaki.pdfIn PDF document text
    • https://wendi101.com/userfiles/file/84784708746.pdfIn PDF document text
    • http://tribo.kz/userfiles/File/84333871606.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16084dffb81c92---midelilujejosodi.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/160af7d1200283---jepowigogowik.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_off0000df59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF59 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f770.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF770 10612 bytes
SHA-256: 3806041542e7498812412cbd8fe6e91b29de1f66ce491655be88e59783917d4f
font_02_sfnt_off00010fdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FDB 18664 bytes
SHA-256: 954ff170244a498d6d33b093d568d45c653dbb5d801a330244004ee461725e64

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