Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4e9ee31f51b631e…

MALICIOUS

PDF

73.1 KB Created: 2021-09-17 14:43:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1e19af8623c7e528800a6d45e7d72306 SHA-1: e24dfe4aed97f5b38ae0a7ad25d1f674f478b066 SHA-256: e4e9ee31f51b631e231372b147cbfc22936b42bb21b5be17223518eb9752a029
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded URIs and is flagged as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a spearphishing attachment designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://synerhu.ru/uplcv?utm_term=sms+to+phone+apk
    • http://wakesup.org/userfiles/file/mukuwavadapudipumub.pdf
    • http://140.121.161.111/ckfinder/userfiles/files/61762161540.pdf
    • https://ecpa.fr/uploaded/file/56791348977.pdf
    • https://acconpriti.com/ckfinder/userfiles/files/gajolezemomubariroga.pdf
    • http://rococosofa.com/files/files/86487834839.pdf
    • https://mklaassen.nl/images/file/filosadiderunitosonejov.pdf
    • http://partner-support.net/user_data/userfiles/files/jodozilov.pdf
    • http://tmkb.org.tr/ckfinder/userfiles/files/29112837312.pdf
    • https://ashleymongolia.mn/uploads/files/34604661062.pdf
    • http://gildiamasterov.ru/userfiles/file/21006030721.pdf
    • http://aallergy.friend-match.com/upload/files/93613018525.pdf
    • https://rachelrom.com/rescontent/file/71244439686.pdf
    • https://www.libyamonitor.com/sites/all/libraries/ckfinder/userfiles/files/31514394153.pdf
    • http://sasnowosielski.com/ckfinder/userfiles/files/palulurifunapebipe.pdf
    • http://4bx.pl/public/file/76606356423.pdf
    • http://www.almansori-ye.com/almansorifiles/files/tagigez.pdf
    • https://fibra-optica.ro/ckfinder/userfiles/files/4351284350.pdf
    • http://debrecen.varosom.hu/userfiles/files/zejusini.pdf
    • http://michael-dhom.com/webseiten/file/wewudufojasipomojusini.pdf
    • http://basketaci.cz/UserFiles/File/rakafamavusikuzemewivak.pdf
    • https://innovaciones-plasticas.com/imagenes_cont/sitio/documentos/nanoden.pdf
    • https://betentour.com/sites/default/files/file/58949200060.pdf
    • http://ajeah-intl.org/fck_image/file/gijovaxapuf.pdf
    • http://vallovin.it/userfiles/files/292007157.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bcd2.bin
dee3aa73d88cf2ebea8d6d312bbcb9cf82c4380564e504fdbff3bfafec4312a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBCD2 10444 bytes
font_01_sfnt_off0000d460.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD460 16792 bytes
font_02_sfnt_off0000ec72.bin
2c1bb68885cfebc0e41b4a30e6807a86f7997732779155bbb3a810e3b342e1f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC72 16576 bytes

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