Malicious PDF — malware analysis report

Static analysis result for SHA-256 d06c92d50d50caf1…

MALICIOUS

PDF

78.8 KB Created: 2021-09-24 04:54:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 4c2df70904eed5d49eb43498cae83361 SHA-1: dc68c110fa527dffa762432e6cf2da62d281bb8a SHA-256: d06c92d50d50caf192a460cc93b7994465fa7ce8e756fedbb63ffd13950caef8
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a heuristic identifying it as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 http://professionalcatererspaul.pageindia.com/resume/cms_files/files/55710376058.pdf In PDF document text
    • https://guptajimarriagebureau.com/userfiles/file/xetotebipalon.pdfIn PDF document text
    • https://aonetreks.com/uploads/file/jasirezobifigox.pdfIn PDF document text
    • http://villaroyalenews.com/userimages/34332661177.pdfIn PDF document text
    • https://stef-nancy.fr/upload/document/97745902290.pdfIn PDF document text
    • https://sts-cct.com/app/webroot/userfiles/files/34991378376.pdfIn PDF document text
    • http://hansungid.com/userfiles/file/98767590489.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16142eed5dab70---8754047070.pdfIn PDF document text
    • https://triatlonshop.cz/userfiles/file/gufosejererome.pdfIn PDF document text
    • http://dongsimkindergarten.com/upload/files/39334000330.pdfIn PDF document text
    • http://dylogistics.com/userData/board/file/tizipobajibateduvisasetob.pdfIn PDF document text
    • https://birotex.rs/images/files/37131600333.pdfIn PDF document text
    • http://sergeybazarov.ru/file/72929464381.pdfIn PDF document text
    • https://kga-am-adlergestell-ev.de/kga/ckfinder/userfiles/files/nemodetijisoz.pdfIn PDF document text
    • http://pvvc.cz/files/79487309230.pdfIn PDF document text
    • https://novitas.ro/files/gutibuzidelarobamemiga.pdfIn PDF document text
    • http://cerescommoditiesltd.com/Images_upload/files/51408232677.pdfIn PDF document text
    • http://mgrima.com/files/file/62478914883.pdfIn PDF document text
    • http://radio-salsa.fr/php/rs/filesupload/file/47898774115.pdfIn PDF document text
    • https://alarouba.com/ckfinder/userfiles/files/75279744397.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=how+to+unroot+without+pcPDF 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_off0000d238.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD238 17628 bytes
SHA-256: 8bcf9eb6edb81aa4e2f09980cf0834a23cfeaaf00e379c8a98c4a791638a1fcd
font_01_sfnt_off0000ff2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF2C 10140 bytes
SHA-256: a8098cbf519bb86a7f20209adf489f2234f80f7e9049b034ae4d62ebdae35f0a
font_02_sfnt_off000115b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115B5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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