Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc6d764addb18ce5…

MALICIOUS

PDF

84.0 KB Created: 2021-07-24 05:30:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: abb63f25c30bbcfee6feeee92986eb49 SHA-1: 53850813969f5a39573f264c52cea2954615d883 SHA-256: dc6d764addb18ce5b504df2dc3257f1363d55557489b25530f1eb33afd90e9b2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as a phishing trojan and the ML classifier returned a high probability of maliciousness. The document contains numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm or phishing lure. While no scripts were explicitly extracted, the PDF structure and embedded URLs indicate an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://carparts-fixture.com/file/file/balipi.pdf
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/atqddn7i578hiuqpa3n4jp2jt2/2473020394.pdf
    • http://lab4050.com/upload/editor/file/xavuwoko.pdf
    • http://esoftland.com/userfiles/file/laruvizosesepogat.pdf
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a7abc9192fe---pakigukatekixakiko.pdf
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/cf160591e59d340dc76b676dc91b6b06/57298855814.pdf
    • http://mariekevanvlierden.nl/survey/userfiles/files/marijo.pdf
    • http://hongshengfish.com/uploadfiles/20210707/210707232801445370bgma44o77p47.pdf
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160e05f66dda19---nasowuvaxotovokogebi.pdf
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/96eed6005973b4b1138cbd10c584a294/34575052031.pdf
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/mt7d16qfnst2lmtgvgsv4t5mfe/tagotuxepe.pdf
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608503952e179---winabid.pdf
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b6d8343de6---12463774294.pdf
    • http://s-privod.ru/userfiles/file/kidawesawaz.pdf
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/16077041fa05cd---poxopadi.pdf
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/b3dc3d7e2165b99d10fc0cc592d47abd/44683394248.pdf
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/8270884b3777d829076cdd6805521a01/33295440488.pdf
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd1a23ec62---99400775382.pdf
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a80abd1e629---48244000735.pdf
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/5956947a0d4c9c93f5e6fc0f3e1f2867/72900129707.pdf
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/k163i9k10oa8mfsu1eabd6p5e7/6602298475.pdf
    • http://digifast.cz/userfiles/pijunojifabozorofuxito.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=how+much+does+it+cost+to+replace+a+accelerator+pedal+position+sensor
    • 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_off0000e6c6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE6C6 16792 bytes
font_01_sfnt_off0000fed8.bin
cfc8c48a51b459f6f62bb799c3b1f8cdea9957e2aa449c4540c463705df0f1d4
pdf-font-stream PDF embedded font (sfnt) at offset 0xFED8 16312 bytes
font_02_sfnt_off000128f5.bin
b1abf833651c53b3b0d172d905baf2cda4c645353fe54095e36a698f54b3fb02
pdf-font-stream PDF embedded font (sfnt) at offset 0x128F5 10956 bytes