Malicious PDF — malware analysis report

Static analysis result for SHA-256 68bdd7960f18260e…

MALICIOUS

PDF

112.7 KB Created: 2021-08-12 02:17:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a129d95126bbb4f7d620108a65cc768d SHA-1: 4008f55a4bdf58acbb1e5c0b149df44e52f979e6 SHA-256: 68bdd7960f18260e217008882b4ad274f3abb85608a48e9415ff775841d883e9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of embedded URLs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic strongly suggest this document is part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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.maderas-navarro.com/ckfinder/userfiles/files/44874118304.pdf
    • http://tzoetemondje.be/uploads/files/16236074621.pdf
    • http://tydafa.com/dafa/uploadfiles/20210612120905.pdf
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16086a41fef296---rukomuve.pdf
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607930130da5b---xavagolegugo.pdf
    • https://heritagecambodiatravel.com/userfiles/file/tafukixeti.pdf
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/2ja3ue873ietuija7ksr2bogjd/11022189277.pdf
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/16076287ff26d3---renimerinog.pdf
    • https://easypayindia.in/userfiles/file/vibola.pdf
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4c9f649cc5---padaridoxuvetiboxize.pdf
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095d301a0618---8479339481.pdf
    • https://mziagroup.com/wp-content/plugins/super-forms/uploads/php/files/v52m4j28uqhgfmj4a41v81v961/pidovagetorowojufani.pdf
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160803d122d480---salijijiwupujaralaraka.pdf
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab7671afe85---24031977662.pdf
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac33e60fe14---96081205418.pdf
    • http://proxkimya.com/resimler/files/dipip.pdf
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/aa9ba7d26e78ac5afbf93eaed36d5e9f/vifunowo.pdf
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/16075692438dba---21969389007.pdf
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609c9efce2ac9---29565617753.pdf
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/16098bfd239d55---72410197702.pdf
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/9b8d32f067502dece33e5b8b6832e02a/56906148301.pdf
    • http://apvn.info/userfiles/file/82365452329.pdf
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7c4d7b9c2---kobizerenalivabesemazepu.pdf
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/ef18a0557fe99102f07df0cb897478f3/13458540455.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=portails+french+textbook+pdf+free
    • 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
stream_008_off00018aa8.bin
5e415f7ef2fbc2d75c725c2eddfe72f34dcf01c899db349482fc53d36d26d3e2		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x18AA8 23540 bytes
font_00_sfnt_off000123a9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x123A9 16792 bytes
font_01_sfnt_off00013bc0.bin
1cad73699e60605361522926258cb08ca45333f144aca666f6633871620a3f43		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13BC0 11052 bytes
font_02_sfnt_off00015530.bin
a8f38356c63a51174fb7b7cb6038503ee8965f40b2a13814f5a2d0f582f80438		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15530 20188 bytes

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