Malicious PDF — malware analysis report

Static analysis result for SHA-256 017e18b7fc9488ce…

MALICIOUS

PDF

73.5 KB Created: 2021-06-23 15:14:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3ebfe3e6493cca20d6885d4cd3132e57 SHA-1: 3ae3614c5dc75f91713732b66c732f5e7213bc5c SHA-256: 017e18b7fc9488ce6a6f46083516fa672c60ee6cc66637eec02a014a0b9318ff
156 Risk Score

Malware Insights

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

The PDF document contains a significant number of links, many pointing to compromised websites and disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a malicious document, potentially leveraging embedded JavaScript for malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://allcreaturesinc.com/files/files/ludulozunalifoditosodad.pdf
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/2f5d9c63704f2dce71af469f694be27d/74838020256.pdf
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073ccbe61fae---buvanakafiva.pdf
    • https://ta-taiwan.com/app/webroot/userfiles/files/dovinakemotupudojiw.pdf
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608f3632ba8c4---7732105827.pdf
    • http://tillmanfamilyreunion.com/clients/b/b7/b7385abc5988d1ee605fea7695e3d00e/File/68649046726.pdf
    • http://vodnik48.ru/content/file/baruwabaledubabob.pdf
    • http://chapelguild.com/images/usr/75167948210.pdf
    • https://refour.dk/wp-content/plugins/super-forms/uploads/php/files/ed6ad230f65788ffaadb78eefd99dbc6/nozitufoberajujeleves.pdf
    • http://smartpaintingplus.com/userfiles/files/4406176429.pdf
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/6bcmph5d2set4c7ggtu7ru7kc5/pawekixisolunijimexunenub.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160878de6106e3---palokujudadavufuwete.pdf
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a7e21c94fbb---48922577370.pdf
    • http://driver-jazda.pl/upload/file/tafibirud.pdf
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/59af92507f2a3b0819dfcf63bfc442fe/57578786415.pdf
    • https://www.spreefahrten-berlin.de/wp-content/plugins/super-forms/uploads/php/files/fhc4k9o6cl070nkm6fo30nu57a/muvijirivat.pdf
    • https://sasalidayanisma.org/uploads/file/jozarunimezirebubamet.pdf
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/16072781610cda---24007253120.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=it+is+a+9+letter+word+1234+answer
    • 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://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bd8a.bin
64bb1d09eb74c5af4905e1ceca953ce50fcbbc296db532a54774cbdd8cb9f2f3
pdf-font-stream PDF embedded font (sfnt) at offset 0xBD8A 5440 bytes
font_01_sfnt_off0000d022.bin
c68af233c684ac23a3d3bbfed3eea4784d398fbeb17eccee32cef0badd43e8be
pdf-font-stream PDF embedded font (sfnt) at offset 0xD022 3400 bytes
font_02_sfnt_off0000de11.bin
897dbb5ae2f5e2745d9412286854f9b3836d36243df4ab5ff7112fe551f1227b
pdf-font-stream PDF embedded font (sfnt) at offset 0xDE11 10520 bytes
font_03_sfnt_off00010201.bin
9a0f576dc8d88f013329f0c12e0a72f1104fdb17645d45aa7ad01cc7b4fd109e
pdf-font-stream PDF embedded font (sfnt) at offset 0x10201 16380 bytes