Malicious PDF — malware analysis report

Static analysis result for SHA-256 3655882f55f2b83e…

MALICIOUS

PDF

69.8 KB Created: 2021-09-24 20:21:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 72b320bf2cffd5ccbcc6589cdfafb36e SHA-1: bb08e676e68177fc947e243934177bece7fd6784 SHA-256: 3655882f55f2b83e66f0a2f27cfc1ffcfcbe68c7b2cda10b9a308b7414410161
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is classified as malicious, with a critical heuristic firing for requesting recovery secrets or private keys. It functions as a phishing lure, attempting to trick users into divulging sensitive information. The document also contains numerous links to external sites, many of which are hosted on compromised or disposable domains, suggesting a broader campaign to distribute malicious content or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • 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.
  • 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://damosushipleasanthill.com/uploads/files/vimesi.pdf In PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/161376c846513c---jovisisixojeguditow.pdfIn PDF document text
    • http://murasakijr.com/uploads/files/fonosiwijus.pdfIn PDF document text
    • https://stiff.pl/ckfinder/userfiles/files/36327244695.pdfIn PDF document text
    • http://thriftstorewebsites.net/flash/thriftstorewebsites.net/file/sefewezojuwidatedonolu.pdfIn PDF document text
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/fbd0f01436c11f9671713a37e0fcce5a/60532456143.pdfIn PDF document text
    • http://mn-print.ru/ckfinder/userfiles/files/44004643822.pdfIn PDF document text
    • https://promise-land.com/upload/file/vuzifevobelemazokobajosu.pdfIn PDF document text
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/d636d5e1a275a38c8c85a3f6161a7825/mazogokakewopofoniz.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1612eed6cae725---vidunukedasupekofufifa.pdfIn PDF document text
    • https://pima-alarms.rs/slicice/file/97727396425.pdfIn PDF document text
    • http://mobilni-kadernictvi.cz/files/file/39830664104.pdfIn PDF document text
    • http://studiodabo.eu/userfiles/files/11025385343.pdfIn PDF document text
    • http://pure-chiral.com/upload/files/gifaweparigubog.pdfIn PDF document text
    • http://zensushialiso.com/uploads/files/radisuluroriw.pdfIn PDF document text
    • http://rutka.pl/media/upload/files/ce6debdeb718b3031e2a610304880c91.pdfIn PDF document text
    • http://telegid.tv/userfiles/file/44957851235.pdfIn PDF document text
    • http://nollve.com/img/editor/image/file/letefavupe.pdfIn PDF document text
    • http://bensonlandscape.com/editorData/file/53447515014.pdfIn PDF document text
    • https://nordavril.com/userfiles/file/xerabufisul.pdfIn PDF document text
    • http://quangcaosmsgiare.com/media/ftp/file/zokigarupexulige.pdfIn PDF document text
    • http://muntepa.com/userfiles/files/puzalojiga.pdfIn PDF document text
    • http://alajwakh.com/uploaded_files/userfiles/files/72671766931.pdfIn PDF document text
    • https://sportyou.fr/ckfinder/userfiles/files/jimakafi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=interview+report+format+samplePDF 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_off0000b1e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1E1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c9f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9F8 10620 bytes
SHA-256: 62ba2bc0c58acfbf33a4eda55f7059ba0220592fe957300447c8cbfc0740991e
font_02_sfnt_off0000e245.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE245 15500 bytes
SHA-256: c90f38817ba46c3e6c5c224866e2b459c74870647f78711c1ce8dbc8e24858ad

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