Malicious PDF — malware analysis report

Static analysis result for SHA-256 e206eb1b45eb1a92…

MALICIOUS

PDF

71.3 KB Created: 2021-09-07 15:37:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: de4acdd6b2661560467f5e65c25c0d15 SHA-1: d56c746b14874c7b8b27c3aceb9e0d5ebe36a979 SHA-256: e206eb1b45eb1a9257e957af1f72ed1530d74d847f870e3f1515ad6b1c9c1cab
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many pointing to compromised WordPress upload directories, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent. No scripts were extracted, but the structure and URL patterns are consistent with malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://emotionpicturesfestival.gr/userfiles/file/57052597249.pdf
    • http://ozkayalartrans.com/userfiles/file/2391418752.pdf
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078f18ce0baa---genarodosazeli.pdf
    • https://ever.dacola.com/upload/files/13557105456.pdf
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/1608b2eb7dfb79---wipixedagewutijubuluwibu.pdf
    • http://www.sphotobooth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607255e8cca20---77063570239.pdf
    • http://csc0535.com/userfiles/file/20210623121607_dzsfvs.pdf
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d91d05bce6---68898518398.pdf
    • http://meble-tk.pl/userfiles/file/xajadotudujuzadapekexolu.pdf
    • https://canionglobal.com/FCKeditor/file/37752609456.pdf
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607bb5df61bdd---bijojelufo.pdf
    • http://papaicountrylodge-longstay.com/user_img/files/97198858106.pdf
    • http://lncxjzxxw.com/upload_fck/file/2021-5-26/20210526102410284719.pdf
    • http://kmbb.at/userfiles/file/benedunemamuzujusaviko.pdf
    • http://pantryscan.com/123cars/imagefck/file/75042535598.pdf
    • http://celyroknaterase.sk/editor_uploads/system/files/gilazuvirinazudosobo.pdf
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9bacc41674---88639512386.pdf
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160877bd67140f---fafazufifus.pdf
    • http://loveforlungs.com/clients/a/a9/a9a80f3a93b7553e0860ec1960497db0/File/verovutadivugiruwemup.pdf
    • http://anhuicrew.com/upload_fck/file/2021-7-6/20210706053641486231.pdf
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/cbbc0da4311591c766503767c5199de7/besesitosufuve.pdf
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160981f611b6fa---tawelatawe.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=4+vedangal+in+tamil+pdf
    • 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_off0000b125.bin
a61687fcfc67900bb67f7b29a24f2842a18b381615a19fdb2bddc04d3799a3c4
pdf-font-stream PDF embedded font (sfnt) at offset 0xB125 18764 bytes
font_01_sfnt_off0000e06a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE06A 16792 bytes
font_02_sfnt_off0000f881.bin
01ad42b15e25c300396c0ec1ef67d5f7a21d4badbccb693a185076bf465efd45
pdf-font-stream PDF embedded font (sfnt) at offset 0xF881 10500 bytes