Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fa11f45d9b10123…

MALICIOUS

PDF

87.2 KB Created: 2021-07-01 19:18:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 60c4e833c574473d8d2039b3a41b0e58 SHA-1: e2c84535f6b40c95999221b9df7a52d5022035a6 SHA-256: 3fa11f45d9b10123fcbfa6478a1841c8401670c199bea592a94df5ad0e015003
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it likely exploits vulnerabilities or serves as a phishing lure. The document functions as a link farm, with numerous embedded URLs pointing to compromised CMS upload directories and disposable hosting, suggesting an attempt to redirect users to malicious sites. The presence of these links and the overall structure strongly suggest an attack pattern aimed at distributing further malware or conducting phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/clfsnd5lesvrpf642tb6r1f6s4/dazeliveletoxifak.pdf
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d85ddce580---34368820140.pdf
    • http://amphorabeautyclub.com/campannas/file/junexavu.pdf
    • http://fonnepal.org/userfiles/file/kidiwakaletunosafag.pdf
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/qljkdk2dcn6j0053jbis1dq1o3/25497434430.pdf
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160a440efdebfc---64335556782.pdf
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098c4503c702---64888738897.pdf
    • http://edgewood1962.com/clients/2/2b/2b25cacec04995aba37d275b9c35b4d1/File/dalevixupavuwosokitameli.pdf
    • https://tedvandergulik.nl/userimages/file/gekogila.pdf
    • https://alternativecarrepair.com/userfiles/file/pujemamabiruwi.pdf
    • https://hifi-markt.eu/kunden/kronhardt/ckfinder/userfiles/files/92024006848.pdf
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160738864812d8---wonivozidigidutapiwotosif.pdf
    • https://learningsolution.ca/userfiles/files/tusupojefanapitevopobone.pdf
    • https://djennebeads.com/nbloom/fckuploads/file/28427380204.pdf
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/piof7qjg31cq2dpt9c1ttv8uhr/sezidimodezudavu.pdf
    • http://baikalspring.ru/ckfinder/userfiles/files/kufamugovamika.pdf
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609daba862ba6---besupaxalovoxuzevawukixo.pdf
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ac160f4e25d---2426108308.pdf
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a06e1f4772f---kewimerewuf.pdf
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/e943e2a07b9be7724d4c4296b0c6f135/dasavo.pdf
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a49cc7a0ed8---gozoxepewu.pdf
    • http://omonetach.pl/foto/ilustracje/file/71933039616.pdf
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16089e88480f7c---fopowogazufopulabuwota.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=gta+vice+city+for+pc+torrent
    • 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_off0000f1b7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1B7 16792 bytes
font_01_sfnt_off000109c9.bin
b7fb175e589c1d5c1fd0732765377d2e12145270ffc17384c9b7d645a1de41da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x109C9 17528 bytes
font_02_sfnt_off000137b1.bin
e8978d6abc7cf18174b4fcf93060f305848a4ced0ee2c9281b63b987fbebffa8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x137B1 10476 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.