Malicious PDF — malware analysis report

Static analysis result for SHA-256 01102dddf516ad35…

MALICIOUS

PDF

89.0 KB Created: 2021-06-25 16:24:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1fad4531b982bf763d3a8177ce033afe SHA-1: febe461e3572155e870ccc5a30f7e10c5c5a663c SHA-256: 01102dddf516ad35015ebe8e70a023911a623ec635cdadcd8932a36b214c028d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, with multiple heuristics indicating it functions as a link farm pointing to compromised CMS upload directories. The embedded URLs, particularly those hosted on WordPress sites, suggest an attempt to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of phishing or malware distribution lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16072efa17f0fe---taporugisuri.pdf
    • http://mackielaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/bafepusetew.pdf
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/a1d2a556be2febb16c42f346d2e8aa78/xutixofojerapotebitab.pdf
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c33030282e5---ravoninesidatu.pdf
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/lmboa5b7cdoapbl1an7rgttf32/72941954903.pdf
    • http://stalmost.pl/userfiles/file/towevuw.pdf
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/t7njprofl22dnc5qo7cog0kf5l/mabotijaladosazofefapo.pdf
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1607fdf81f23c6---bubozarop.pdf
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/8fb9030f3e1fef00b2c3c866504645a4/rakametamasalulojiliva.pdf
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/v0al1a3dtkqjd7i41ibsg6b5d7/56447486578.pdf
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/f14536019af02aa565249828a18f0a2f/jolunumevebis.pdf
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083a6afcc707---53906951180.pdf
    • https://zlatartopalovic.rs//files/zupiwape.pdf
    • https://luyenthitoeic.info/userfiles/file/feworakagexagaresakebifex.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=daily+bodyweight+exercises
    • 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_off0000fadb.bin
39379ec999837192611969487b2b10642e7115b43e7539d19e82084ee4f85345		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFADB 16568 bytes
font_01_sfnt_off000125d6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x125D6 16792 bytes
font_02_sfnt_off00013ded.bin
2cd02f5564ac5574c3f80b996260b4167e076d0b10331b56c9c873d194783ceb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13DED 10988 bytes

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