Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9699b629cb575ef…

MALICIOUS

PDF

94.4 KB Created: 2021-07-02 09:19:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3106072c4f9e10841318ba48cebb92e5 SHA-1: 9a48694227f85a8664f18559bb4b5026f4d212c7 SHA-256: c9699b629cb575ef1a103aa4248ce4815afdbe9a8a9ead604c86aac5bdf60718
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of an IP address literal in a URI further increases suspicion.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9918

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
  • 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.
  • 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 https://growyourmoney.in/userfiles/files/25091385688.pdf
    • http://commsoft.nu/demo/ktb/wsmbilder/files/dajuwabosegobaf.pdf
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf8c10f38d3---fexuxosatujitel.pdf
    • http://hz-karavany.cz/ckfinder/userfiles/files/nebanopuwo.pdf
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af7c28eca60---kowazejizunegesatuw.pdf
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/14f549e6180d661ad26df78dff595f54/kujufireba.pdf
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/16088dd2717b41---33776281678.pdf
    • https://study4student.com/cache/fck_files/file/2719131803.pdf
    • http://nhandieurangmuoi.com/ckfinder/userfiles/files/lezuvunupume.pdf
    • https://alatheir.com/atheirwsfiles/file/47010496068.pdf
    • http://157.230.241.115/image/upload/File/74412769614.pdf
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607d0427d16da---nekumoso.pdf
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/55sijd950fqb00lialb2r0brl2/luwivomimizid.pdf
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/2b94fecd8a1d446a3f08490e2b275442/lopojofesax.pdf
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/70c1816e0e04499efb6f835e9aa26694/bidojomujobofilapuxikox.pdf
    • https://fcr-fomentoconsumoerenda.com/uploads/files/wewifexorupeputamovo.pdf
    • https://consultingexpert.eu/fckeditor/userfiles/file/xuxemo.pdf
    • http://anaminfo.com/attachfile/file/57847204265.pdf
    • https://uclerbaklava.com/resources/file/63430797438.pdf
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/160867dbe9a226---75075578912.pdf
    • https://genericdiabeticteststrips.com/userfiles/files/suledarifepuwutizan.pdf
    • https://thesaddlebank.com/wp-content/plugins/super-forms/uploads/php/files/t1e1mppq21fs8bt3ihrct3oh0s/74349020679.pdf
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0e91716017---wisugikopope.pdf
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/33094a55ab55cb5b2dfadeb51156b4bb/54167099632.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=chemistry+worksheet+lewis+dot+structures
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f86f.bin
74ea40c6abafff908ba0a862ebf25ee1d47d31f530ca964bdc695191fb21b084
pdf-font-stream PDF embedded font (sfnt) at offset 0xF86F 16116 bytes
font_01_sfnt_off00010dc7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10DC7 16792 bytes
font_02_sfnt_off000125d9.bin
816f43455960eb8553febabb0db486e095c0bb675b5c659c36cfe3e7f1edde6e
pdf-font-stream PDF embedded font (sfnt) at offset 0x125D9 17116 bytes
font_03_sfnt_off0001527b.bin
cfb55f8467d13de0a6b90c3474ad12a1471ee90006d7aeff96d7e94086bc3a86
pdf-font-stream PDF embedded font (sfnt) at offset 0x1527B 10792 bytes