Malicious PDF — malware analysis report

Static analysis result for SHA-256 3005f8d8817a372b…

MALICIOUS

PDF

72.6 KB Created: 2021-05-29 12:25:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c68a8edafa2074245f06778a37de96cf SHA-1: 48080b017311d16003d65dedfa4b37da3363fbd8 SHA-256: 3005f8d8817a372bb96acbcc52abeee64e5b4ec2f387f5b28eb0d33ca3b76d84
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a link farm or phishing lure. The presence of embedded URLs and the PDF structure, combined with the ClamAV detection name 'Pdf.Phishing.Trojan', strongly suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/160724d56ede9c---17208765963.pdf
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607d3d1def07a---36280423306.pdf
    • http://hillcountryawningsandsunscreens.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081dea4aafa0---49624022940.pdf
    • https://bbmint.com/userfiles/file/jaresurawis.pdf
    • http://sarlampa.ru/upload_picture/wiwiwibasipo.pdf
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/0hmom8m8neg9rh4oj2nremmb54/61482542577.pdf
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/f650d52016e61752549ff2a798ffc881/xasofoxexoxorawalikajedu.pdf
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1609ed1251c7f5---28765792460.pdf
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/n49cfl4n31alta7adnjdcpfsae/virarobasadafererib.pdf
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa56642371---16895067568.pdf
    • http://balogmihaly.hu/UserFiles/file/galisojotonurir.pdf
    • http://doyen.cc/images/upload/File/jimezedodojibigixogunixat.pdf
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/d00e6nvhtq9j3aclq2gukr6s4e/80322069910.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=how+to+change+the+brightness+of+a+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://scripts.sil.org/OFL
    • 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_off0000ca88.bin
73f26008dcfd6807b0b761705416c776a68c5d34c6f94e8e63c30f06a702049b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCA88 5576 bytes
font_01_sfnt_off0000dd89.bin
7a80d20e4fa2a3aee101941164cc1990b5a8de238204dde7714695594d4ce190		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD89 10316 bytes
font_02_sfnt_off000100a0.bin
4ef9506ee11a349461550e6b437e3786686b598308a87786035880d16624999d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x100A0 16060 bytes

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