Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba02f0901a94af94…

MALICIOUS

PDF

79.7 KB Created: 2021-09-23 02:09:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 783fa269e54b98e6822147b6e508f878 SHA-1: adc213e829f13dbd080f2762034b15b09afbb954 SHA-256: ba02f0901a94af94ce175721c0ecfdffe0993d81e12096f4f6fd6428c5d96298
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to disposable domains, a common tactic for phishing or malware distribution. The heuristic 'SE_SECRET_RECOVERY_LURE' indicates the document's content is designed to trick users into revealing sensitive information like private keys or backup codes. The ML classifier and ClamAV detection further support its malicious nature, likely as a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 https://coretry.ru/uplcv?utm_term=android+phone+not+receiving+texts PDF link annotation
    • http://tomgiongvip.com/uploads/files/file/xavediluxo.pdfIn PDF document text
    • http://hongshengfish.com/uploadfiles/2021090402073973970.pdfIn PDF document text
    • http://mobilenmr.com/files/files/xozutobizikusufojizofeg.pdfIn PDF document text
    • http://baihsad.com/userfiles/files/20210919_150323.pdfIn PDF document text
    • http://worshipedia.mobi/sites/default/files/file/bepifuzefavon.pdfIn PDF document text
    • http://www.heksan.com.pl/file/97631505709.pdfIn PDF document text
    • https://fullhousetourism.com/UploadFiles/file/20210910000206195.pdfIn PDF document text
    • https://www.willmarshelter.com/ckfinder/userfiles/files/pojivegevojugipar.pdfIn PDF document text
    • https://medbillings.us/lightspeedweb1/file/judupotanusijav.pdfIn PDF document text
    • http://nigerseedindia.com/uploads/40496507839.pdfIn PDF document text
    • https://pasarangroup1.com/contents/files/52724838590.pdfIn PDF document text
    • http://aan.kz/ckfinder/userfiles/files/kufikatifagipa.pdfIn PDF document text
    • https://wecareu.net/ckfinder/userfiles/files/gapowudewapof.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/53590f2e4461aad6b83dd8d295fa01c5/5276353635.pdfIn PDF document text
    • https://classconnbio.com/img-jacson/files/69937949159.pdfIn PDF document text
    • http://garankuccu.com/upload/fckimagesfile/f998bf6ea651e4de753bbd1f6dcf9411.pdfIn PDF document text
    • https://themalc.org/files/file/93869569957.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1614b54cb3e8ce---98004711815.pdfIn PDF document text
    • https://zniczekowalczyk.com/user_images/file/4289883757.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_off0000d240.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD240 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ea57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA57 10732 bytes
SHA-256: 127fa5cc326308cf5548f6fe1225cfa962fe102f298cf6c6ba3c8672754425a3
font_02_sfnt_off000102bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102BB 18332 bytes
SHA-256: bad6cadf6f5cfb24612707ff49635b63c93bfef986f5634ec53c8e449eea0d06

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