Malicious PDF — malware analysis report

Static analysis result for SHA-256 eedba60ebed3f4fd…

MALICIOUS

PDF

85.7 KB Created: 2021-07-20 13:16:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0070207fa04193659f38ea8fd5ec8d4c SHA-1: 02e9d69f8ef6b773f307347da111f33a02738e62 SHA-256: eedba60ebed3f4fdef3f24ca04fd9776f4ce0c4f3e34688532a87f8be7d76570
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, which in turn host other PDF files. This pattern suggests a link farm designed to obscure the ultimate destination, likely a phishing page or malware download. The ClamAV detection and ML classifier strongly indicate malicious intent, consistent with a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/p5uempi08tak59ajo8ke95lqkf/mapovukanolu.pdf
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ed00ac9e97---45860245227.pdf
    • https://fceresources.com/ckfinder/userfiles/files/xonerofumemebugaramoxu.pdf
    • http://alexsrmenchion.com/clients/b/bf/bf5401b25fe3457642f5a6f1150d5537/File/41667033765.pdf
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/e023c764814f166f7fceaf2dd773235e/16297669531.pdf
    • http://kozmetikadunakeszi.hu/userfiles/file/jetukefivaromefugexigiwo.pdf
    • http://marketherballize.com/ckfinder/userfiles/files/xivipasuxupikelufironosi.pdf
    • http://aisef.org/uploads/userfiles/file/file/56077143575.pdf
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/50n0kop0sl4kb8knfti5j6vtit/rafufogu.pdf
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606ec2ea87233---47523156606.pdf
    • http://fireprovietnam.net/luutru/files/gidukagekedotusa.pdf
    • https://carsen.sk/editor_uploads/system/files/82100713926.pdf
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/eir9dukpd1172ctqtmhihe2pu7/suwemanapetasokikuzoja.pdf
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dc46fddb078---43113060971.pdf
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/2c2d21224734971375b8db710d260d27/30667750165.pdf
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607315bab4d96---fupimifovivubo.pdf
    • http://kokocurry.gm/userfiles/file/69934434150.pdf
    • http://burfel.ru/upfiles/files/38196834420.pdf
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/285cc74eb9a4d026b7f98934a1b9e5c7/95728742113.pdf
    • https://aadhaarretail.com/administrator/imagetemp/file/ginipixizakimibiziwi.pdf
    • http://broadviewlibrary.org/uploaded_bvlib/file/74588543135.pdf
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/160a3461e2863d---59623705171.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=chips+and+guac
    • 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_off0000ea37.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA37 16792 bytes
font_01_sfnt_off0001024e.bin
801ae06867208a0a83f98e0f1444106593e31939711d249e1f8e699225159474
pdf-font-stream PDF embedded font (sfnt) at offset 0x1024E 10428 bytes
font_02_sfnt_off000119a3.bin
6b56255d018686752f9b0fc3dfc860595582bdb7b4a9f86c9988bde14878aa4e
pdf-font-stream PDF embedded font (sfnt) at offset 0x119A3 18008 bytes