Malicious PDF — malware analysis report

Static analysis result for SHA-256 01d2fea7d72cf2b6…

MALICIOUS

PDF

90.5 KB Created: 2021-09-10 21:55:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: c18f78e774e57a52299123749ec9819b SHA-1: 02aba012ee819931138796644a585aaa9d7b938f SHA-256: 01d2fea7d72cf2b6995b3c6b6470c9b0305f785eea2c9c7b36817090979eb2b8
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as malicious by multiple heuristics, including a critical ClamAV detection and an ML classifier, and is specifically flagged for attempting to recover secret recovery phrases or private keys. The presence of embedded URLs, one of which is a link farm, suggests an attempt to direct users to malicious content. Although no scripts were explicitly extracted, the PDF structure and the nature of the detected lure indicate a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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://noospc.ru/SITE/files/editor/file/vekazela.pdf In PDF document text
    • http://kajo-frings.de/userfiles/file/995732805.pdfIn PDF document text
    • http://ensky-chemical.com/upload/files/rifiwakipimibigumirige.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613564f5ca3c0---vawuli.pdfIn PDF document text
    • http://qqwandai.com/uploadfile/file/24661524092.pdfIn PDF document text
    • http://metapolar.hu/tmp/kifevofarulipozowamowojix.pdfIn PDF document text
    • https://hediyelikhanem.com/calisma2/files/uploads/64073888210.pdfIn PDF document text
    • http://birnagarcollege.in/userfiles/file/59179629667.pdfIn PDF document text
    • http://sevenseahotel.com/uploads/images/files/maketarajugomeke.pdfIn PDF document text
    • http://liburnia.pl/userfiles/file/tisal.pdfIn PDF document text
    • http://jedzenie365.pl/ckfinder/userfiles/files/85345036956.pdfIn PDF document text
    • http://bluelakehomestay.com/uploads/image/files/35300930048.pdfIn PDF document text
    • http://js-space.de/userfiles/file/4610629850.pdfIn PDF document text
    • http://bekescsaba.varosom.hu/userfiles/files/6678278812.pdfIn PDF document text
    • https://chasehr.in/userfiles/file/53938851536.pdfIn PDF document text
    • https://lean-ds.com/upload/editor/file/napanosapekokod.pdfIn PDF document text
    • http://hitechdentalhouston.com/uploads/files/soboledezojazopozazo.pdfIn PDF document text
    • http://daming-school.com/userfiles/file/gubivikodoz.pdfIn PDF document text
    • http://bernardthevenet.fr/ckfinder/userfiles/files/39354643157.pdfIn PDF document text
    • http://leadingedgecorporate.com/user_images/file/najevugik.pdfIn PDF document text
    • http://petgears.com/app/webroot/files/file/97034809565.pdfIn PDF document text
    • https://vegas-shop.net/uploads/files/xofimikugaduguz.pdfIn PDF document text
    • http://lynxitservices.com/ckfinder/userfiles/files/vuturirapebuza.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130c430b93a1---witanodawovalajikagora.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=365+days+full+movie+free+download+mp4PDF 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_off0000f837.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF837 18604 bytes
SHA-256: 1371ce055281965155075bfe965c079519484ea21f17d0f9d9e90c22fb06df3f
font_01_sfnt_off000128ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128AE 11384 bytes
SHA-256: 72b01a0eed7d6f738bb5d19a572ba28e9826a9cf2bfa17e98ce7e60cf17ab9d2
font_02_sfnt_off00014396.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14396 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1