Malicious PDF — malware analysis report

Static analysis result for SHA-256 23208ffa8109f07c…

MALICIOUS

PDF

92.4 KB Created: 2021-07-26 13:03:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 62fd260d72f3bb30f686baf86eabcf22 SHA-1: caf1b12d0304f3f011cb463b19de6b7790a3e812 SHA-256: 23208ffa8109f07cf458c7ee9e6306aa223acbda64378fab5f368972ba731b18
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress upload directories, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious sites or download further payloads. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b700ca45b33---76418601416.pdf
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/6qdrns4hv4h8q1ovuaj9slkq33/46965611517.pdf
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/b9khgprq2n6pc7gebmm91trav6/42034145577.pdf
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160faac37b512a---mojovetixagukobikanatowin.pdf
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16091dd3a43cc8---4722277847.pdf
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a9dd4f49381---posepidemilurixugutanitos.pdf
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e97b72bcd2---99838961748.pdf
    • http://rallyteamwalraven.nl/file/36360305812.pdf
    • https://biodent.ro/m4fm_files/m4news/ck-uploads-files/40057883286.pdf
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/160883ff54cae9---47569190011.pdf
    • http://hkalc.com/userfiles/najagazofife.pdf
    • http://steelfurniturecn.com/d/files/mazawawi.pdf
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160782880c137f---mexijukogiwepepixizigivin.pdf
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1608c6664d6456---94898714522.pdf
    • https://vieclambanhang247.com/upload/files/64156510175.pdf
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160dacadd06aed---54332735168.pdf
    • https://topclassgreenery.nl/images/file/45589448757.pdf
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1ed06cd6c4---87670938567.pdf
    • http://beiwendq.com/userfiles/file/48031413593.pdf
    • http://prime42.ru/userfiles/files/felidenafin.pdf
    • https://afra24.com/basefile/afra24/files/kizigix.pdf
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a8b7284e6ca---suxoxurok.pdf
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/16075337dacee1---7928245743.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=sq8+camera+manual
    • 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_off0000fc95.bin
20e76eadf4195066d474c52357d5120a70f14471ab25fd9df574fcdc62087282
pdf-font-stream PDF embedded font (sfnt) at offset 0xFC95 10440 bytes
font_01_sfnt_off0001143b.bin
2e934bedd0608d8e63f9ff2d0b9d8546af714667b6e67536d3e5ea34ccc1f612
pdf-font-stream PDF embedded font (sfnt) at offset 0x1143B 21688 bytes
font_02_sfnt_off00014b99.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14B99 16792 bytes