Malicious PDF — malware analysis report

Static analysis result for SHA-256 1493fd28e6559d02…

MALICIOUS

PDF

67.6 KB Created: 2021-09-26 05:46:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: c4deff970a6bb6087a5b27be793646bd SHA-1: f624a7ffae41023fc90eaa07c9cb472259da57ac SHA-256: 1493fd28e6559d02d8327ba740a029514f11fbbbf6f9f097139c2622884e4cda
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains a large number of embedded URLs, many of which point to disposable hosting and utilize UTM parameters, strongly suggesting a phishing or link farm tactic. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags this behavior, indicating the document's purpose is to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://crysiq.ru/uplcv?utm_term=art+models+9+pdf PDF link annotation
    • https://orcasproje.com/userfiles/file/42253828749.pdfIn PDF document text
    • https://beamstraffic.com/amb/userfiles/file/57695610445.pdfIn PDF document text
    • http://myshopgroup.com/userfiles/files/43132568369.pdfIn PDF document text
    • https://sanaspinler.net/calisma2/files/uploads/19858279678.pdfIn PDF document text
    • http://gtlitalia.com/userfiles/files/gubezifulananifogewaz.pdfIn PDF document text
    • http://snft.ro/media/file/72821743079.pdfIn PDF document text
    • http://strandedtattoo.com/file/bisomilivomazosimulorekaw.pdfIn PDF document text
    • http://itena.si/uporabnik/file/luriv.pdfIn PDF document text
    • https://telechips.com/ckfinder/userfiles/files/tuwamofalef.pdfIn PDF document text
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134608255e33---54983076565.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/671b64153d5074c1b3bec187606c303a/xeliwolagiwame.pdfIn PDF document text
    • http://winecellarkeeper.com/ckfinder/userfiles/files/1423274430.pdfIn PDF document text
    • http://eko-baby.ru/userfiles/file/vidixu.pdfIn PDF document text
    • http://confidenzacsapagy.hu/upload/42635612366.pdfIn PDF document text
    • http://officegate.biz/admin/fck_upload/file/bipogitigovop.pdfIn PDF document text
    • http://stilna-ya.com/_userfiles/file/roloxab.pdfIn PDF document text
    • http://debseven.net/UserFiles/File/timin.pdfIn PDF document text
    • http://daithanhnam.com/upload/files/15663427140.pdfIn PDF document text
    • https://www.xyoaa.org/sites/default/files/files/28033691791.pdfIn PDF document text
    • http://woodbridgeabw.com/uploads/files/maxinuvabebowikelogawuf.pdfIn PDF document text
    • https://divinenine.net/userfiles/file/62664111610.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_off0000ab07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB07 15204 bytes
SHA-256: 1d42ad03e88061227c7bfa4981e6b01d62369689bb627d22c0611fd2bec789cd
font_01_sfnt_off0000d176.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD176 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e98d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE98D 10452 bytes
SHA-256: e41cad58d2c600adc61ba1f3db205414047830e147906e5edbca05b4365998b6

Open this report in the interactive analyzer, or submit your own file for analysis.