Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c59c45b9dfb33e4…

MALICIOUS

PDF

87.2 KB Created: 2021-06-28 00:13:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1532e72035ecce77b88c17b906081319 SHA-1: e44d7b85842664b3f6b3b531282025bd4f400d4f SHA-256: 6c59c45b9dfb33e457981fb631d1fc978b639fb11f720b4e0d3f373db5f759c8
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV, flagging it as a phishing trojan. The document contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to redirect users to malicious or phishing content. While no scripts were explicitly extracted, the nature of the link farm and the detection as a trojan indicate a likely intent to deliver a secondary payload or lead users to a fraudulent site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/1608b85b22666c---gazavezegegupok.pdf
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c233918927d---belovibefomuwifufo.pdf
    • http://sns.hu/_user/file/24245836607.pdf
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/160884049eaa24---3081629385.pdf
    • https://blokhol.com/upload/files/96448427064.pdf
    • https://daaeportrett.no/upload/file/raniromovunag.pdf
    • https://oddluzanie.net/userfiles/file/sabejetajesorimemeg.pdf
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d2dc9c61513---saveregubowemipugifito.pdf
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1608a3206d9c5b---favugozijusavubobaxewopit.pdf
    • http://ampletrekking.com/userfiles/file/9875727275.pdf
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073993bc24f4---39193590720.pdf
    • https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/97941e04b3a658d21af6f14ae2c166b3/gufozefejomafenejunula.pdf
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a5f2aa27706---magupefikedarugodub.pdf
    • https://imagebeaute.fr/userfiles/file/dizokuwepivugosefuz.pdf
    • http://www.uniformsolutionsforyou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d52dc9e032---66077114845.pdf
    • https://thewaves.net/wp-content/plugins/super-forms/uploads/php/files/ur15jpqs8l6bnuqabg73lojrco/79205467078.pdf
    • https://www.movingwithmagna.com/wp-content/plugins/super-forms/uploads/php/files/a3f6abeee7700c1572fd15ecd73856e0/rapolotigozumijiverek.pdf
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079841e192c3---54277817395.pdf
    • https://www.bakirkoytemsilcisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607de2ebe8cc3---xunudiwor.pdf
    • https://adlinefor.com/home/webagen/public_html/korn/data/file/74178258896.pdf
    • http://ubestsports.com/imager/files/20210627214257.pdf
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/a39e738b98ce091036f10481fa4b4187/94173588907.pdf
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16087146c8c3fd---vewid.pdf
    • http://sunnysideclassof64.com/clients/a/ac/acc4ccb49d7935ca36198347b895393e/File/texetiwuxosilifalamorolu.pdf
    • https://zivotzaokny.eu/res/file/80809299530.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=stretching+of+trapezius+muscle
    • 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_off0000f47b.bin
4f866511905464ebc3df8f63a46908a93177cbef1230f0dc68137f1c0299926a
pdf-font-stream PDF embedded font (sfnt) at offset 0xF47B 15924 bytes
font_01_sfnt_off00011d7f.bin
af223240a98679b01e454bfe65e244de2d7610bbb9c5ef8734a9f6d382889fb4
pdf-font-stream PDF embedded font (sfnt) at offset 0x11D7F 11164 bytes
font_02_sfnt_off0001376f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1376F 16792 bytes