Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9a762745c8121f5…

MALICIOUS

PDF

87.2 KB Created: 2021-07-02 02:34:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 722dee4dfc4bccd752e0df55235f8bc9 SHA-1: ed3a895a804ff65ff8f050851fb282ed1f30b7fe SHA-256: e9a762745c8121f506e94f5b148eb7a5ddccbfbed4406ac3971c868d4584c8b5
156 Risk Score

Malware Insights

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

The file is identified as a malicious PDF by ClamAV and an ML classifier. It contains numerous links pointing to compromised websites, indicating a link farm designed to redirect users. The PDF's structure and the presence of multiple external URIs suggest it's part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/8f8c2f24fcb074099d5b57885fc30096/womudakatepela.pdf
    • http://orsolyajuhasz.com/ckfinder/userfiles/files/56878564310.pdf
    • https://namdolove.com/FileData/ckfinder/files/20210618_EF260671FD8E06DB.pdf
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b078e62bf78---88656597018.pdf
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160930f488b8c6---23480170076.pdf
    • http://norilskgu.ru/userfiles/file/70442531606.pdf
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/70bret80tj8ujar2juc5280hk0/nodedidujusemobuw.pdf
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9f817f2b6---69825642272.pdf
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607da995e0cb3---32619680602.pdf
    • http://galluccifaibano.com/userfiles/file/jetusaviboxeka.pdf
    • https://by-express.com/upfiles/editor/files/woxekomadazafebazugobesam.pdf
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16086d58b8fe86---xikezik.pdf
    • https://yuss.it/file/sexawu.pdf
    • https://memoservicesrl.it/file/lovuleredafuwemofun.pdf
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/f6621f4e9369b42f3fe6701d5fc96959/54361320700.pdf
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/3d4a8e294f7bf01fc6ecc5117fc7ea9f/92474712391.pdf
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d8052a5db1---xuvaguwodovojidujugejid.pdf
    • http://52fotki.ru/ckfinder/userfiles/files/bozasujozi.pdf
    • http://itssilvertime.com/clients/2/24/24efe347a73a8ce028152bf895bc11a7/File/kegunivurejavazono.pdf
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/m7ii4kf2hpc8fmjc1b1s75cq25/pujedobusazokolarivibus.pdf
    • https://lamaisonducoeur.ca/upload/editor/file/55363232166.pdf
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608faeeece55b---rimapuxorifokigebes.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=happy+home+old+age+home
    • 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_off0000f3e5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E5 16792 bytes
font_01_sfnt_off00010bfc.bin
2bf47b3550c8fc08a2093bd100335f64ade1ebe2176bb15d5cac8c3f1c74453c
pdf-font-stream PDF embedded font (sfnt) at offset 0x10BFC 10380 bytes
font_02_sfnt_off0001232c.bin
0b671dc8f564be0c3cedd2c432a0620575b19860f4da5bbda7fc95bfcde741da
pdf-font-stream PDF embedded font (sfnt) at offset 0x1232C 17208 bytes