Malicious PDF — malware analysis report

Static analysis result for SHA-256 abe7a19773a056ac…

MALICIOUS

PDF

94.3 KB Created: 2021-06-26 00:16:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b97a569e91cc52c231e113b0713bde74 SHA-1: 2d5679ad3f5471443e0c067542520de2d58769bd SHA-256: abe7a19773a056ac4e719bebaf4173a9d570156121ab5a0b5313bba45e73c8f7
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains a link farm pointing to numerous websites, many of which are hosted on compromised CMS platforms or disposable hosting. The embedded URLs suggest an attempt to redirect users to potentially malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://chris-arnold.com/userfiles/file/45752277789.pdf
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e9dde4383e---86214590589.pdf
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/n2a4prmqvf55ee07429899tfjd/77952118796.pdf
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/61d1d3cb5f95057f0ad9f94ca26f9166/53515807621.pdf
    • http://itssilvertime.com/clients/2/24/24efe347a73a8ce028152bf895bc11a7/File/bikeselugurimiw.pdf
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/0nnjoq5j07o2v2sek3kipqd8iq/gegebezome.pdf
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/a2ddd414ca5d821eeda004fd2b46a8e6/96194439436.pdf
    • https://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/a4097ce2b12503961b8a7aaff69ac0f6/dexumufutore.pdf
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/sireqirmg5omhnhfdstsmuv40h/48623944252.pdf
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/5h2i3om5ccl0lc7nakhefti62l/43659347836.pdf
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/b2f02b5e76eed901ee03c1dca8a38fa9/67226679795.pdf
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078e0ed72334---buraxojonid.pdf
    • https://coatielectronica.com/files/sedaded.pdf
    • https://abe-rdc.com/userfiles/file/duperajoxarelijavomuw.pdf
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/0eaf93ee93e3a25c32b3c0678d38db53/kujaperekite.pdf
    • http://ecohouse-lab.com/userfiles/file/zufonizagak.pdf
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160739e4d77a40---gufinuxab.pdf
    • https://codecs.roimages/file/bakaxoguzajujabunixa.pdf
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1c6ceb601c---56116078130.pdf
    • http://ranaghatpchsschool.org/userfiles/file/zoguzerafanafakoga.pdf
    • https://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/0d626d389ec111869e2da19184d3ae0b/gakolitezaremefekit.pdf
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/jc9iaquc6n364mjeolf1rkutir/73037146106.pdf
    • https://thesaddlebank.com/wp-content/plugins/super-forms/uploads/php/files/38dg4f5nmpcn2rdqgra985qaiv/29538076513.pdf
    • http://brickchamber.com/ckfinder/userfiles/files/22144866108.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=mechanics+of+materials+8th+solution
    • 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_off0001073f.bin
4d18ba1e8534febcf539a98bce7b78dbc9b58e76cf977d1cfab25a7990be34c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1073F 19136 bytes
font_01_sfnt_off00013908.bin
203e76219fc5cc6adcfab0608fa04be1f693c769f2ed2fb468ef1dad48b8a9d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13908 10904 bytes
font_02_sfnt_off00015216.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15216 16792 bytes

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