Malicious PDF — malware analysis report

Static analysis result for SHA-256 755ebfd750e5e677…

MALICIOUS

PDF

88.1 KB Created: 2021-07-05 19:07:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d49adcbb09a3f11da1f591e9e0041445 SHA-1: c00cc4bec27b487047cb55c839bc8202c87ab798 SHA-256: 755ebfd750e5e677eef3189a7f33b91910a4dbf95d0c0f0305f01efeefe1e776
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of links pointing to various domains, many of which appear to be compromised or disposable hosting. This structure is characteristic of a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://richiefamilyreunion.com/clients/7/7d/7d03816b951c94fc7c065ced7c7ccdcd/File/fexanazod.pdf
    • https://vetranhtuongmamnon.vn/wp-content/plugins/super-forms/uploads/php/files/qp37r57vdukp41cqkt1jj6u1ct/72502467948.pdf
    • http://commsoft.nu/demo/ktb/wsmbilder/files/dizujogodofupopadefi.pdf
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/d105b54224365414e95a300ead6c995a/23110386980.pdf
    • http://imi.vc/upload/files/nitixe.pdf
    • https://susta.vn/userfiles/file/foweriguw.pdf
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/b88os2l70vl9v8h74c94vi8967/23586027931.pdf
    • https://leavereview.com/customerinterview/ckfinder/userfiles/files/jimevujuzonoguxamexoxa.pdf
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/e35d1a88bedc2e2347f31c468890afb2/34846025464.pdf
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/9b7f088f711e17601f11a8f75100419f/9297374685.pdf
    • https://almoheetmanpower.com/public_html/userfiles/file/likozilukazixa.pdf
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/mbo0qm2a90kgu0gsk1pldashi1/wabovuxirapogekekenoxamoz.pdf
    • https://abugfreemind.com/userfiles/file/38894775479.pdf
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608d2576105cd---judoxududaf.pdf
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160985e5c27d50---91835423110.pdf
    • http://moestuinwebshop.nl/userfiles/file/mupedizolem.pdf
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a89d6f14ad---webozer.pdf
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/44c761ae075a171f2173ca20331d70d9/zatujuwesapexo.pdf
    • http://hoangduy.vn/vn/files/valexirog.pdf
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607925ff1d987---18329660071.pdf
    • http://mindatpeace.us/uploads/files/vefebokaki.pdf
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160dc2ed65f9a1---55882857375.pdf
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160944b48ceea2---13351322079.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=abandoned+pinoy+full+movie+online+free
    • 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_off0000f6d5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF6D5 16792 bytes
font_01_sfnt_off00010eec.bin
4633a411511811a753bcee146ee4bf23c1784aec0c964ef0d994ce99955c6e2f
pdf-font-stream PDF embedded font (sfnt) at offset 0x10EEC 10796 bytes
font_02_sfnt_off00012785.bin
bdf6ee2c4e2a06ffb939aa59cc612f3f345bb7d45700c6dece51fa4a5c266613
pdf-font-stream PDF embedded font (sfnt) at offset 0x12785 16768 bytes