Malicious PDF — malware analysis report

Static analysis result for SHA-256 861ed426679cf29b…

MALICIOUS

PDF

98.8 KB Created: 2021-09-09 20:01:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 637b53d375d6bfa40ef14bb7423ae9d2 SHA-1: 5908b911f952610d41447d5816283c237ba222f7 SHA-256: 861ed426679cf29bc84c8a37118da506600f230c9b1fd9570880d37b24d14222
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://pixomot.ru/uplcv?utm_term=it+full+movie+stream PDF link annotation
    • http://yanarfabrics.com/firma/files/vedopatani.pdfIn PDF document text
    • http://classicalgardenornaments.com/uplds/file/15833318212.pdfIn PDF document text
    • http://domadoma.cz/userfiles/file/97808842554.pdfIn PDF document text
    • http://fandimnarodaku.cz/upload/file/sezutimimifodudo.pdfIn PDF document text
    • https://boucherienabli.com/uploads/FCK_files/file/fimeku.pdfIn PDF document text
    • http://stauarchitetti.eu/userfiles/files/20163497850.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16137afdf46632---xanizinuko.pdfIn PDF document text
    • http://gerastar.com/userfiles/file/54329076968.pdfIn PDF document text
    • http://go-trec.com/wp-content/plugins/super-forms/uploads/php/files/jtndkpg4361u7plr274dm9eqrf/49419074486.pdfIn PDF document text
    • http://danchrisjewelry.com/userfiles/file/lenevidatilinafupoxote.pdfIn PDF document text
    • http://urbanelect.com/userfiles/file/dinekuvol.pdfIn PDF document text
    • http://savitapiti.org/ckfinder/userfiles/files/84718553546.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/16130569e49e0e---movalok.pdfIn PDF document text
    • http://erodiertechnik-wenzel.de/userfiles/file/rakedu.pdfIn PDF document text
    • http://aorganboys.handyfriendship.com/upload/files/dotakawukesafipisuk.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fe20ff2ef2---zewawenufatavurasenog.pdfIn PDF document text
    • http://laiyi-art.com/userfiles/file/18267900903.pdfIn PDF document text
    • http://saveursetsavoirs.fr/image/file/26703671598.pdfIn PDF document text
    • http://chiesamadremarsala.eu/userfiles/files/mufelowufuvokimoviparine.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613037d78fdd2---rufafevudagudos.pdfIn PDF document text
    • https://ljlconst.com/admin/images/file/zepemexavuw.pdfIn PDF document text
    • http://tiga.co.th/ckfinder/userfiles/files/siperuwaruzinexefivo.pdfIn PDF document text
    • https://eklyps.net/images/file/zidofofiruzupanegop.pdfIn PDF document text
    • http://xn--e1aazeoc7d.xn--p1ai/images/shared/file/lekajoxemujaperiwuvab.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011f4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F4F 10388 bytes
SHA-256: 3738baba7c178d3e2db2196e16a74752e42d3616106d1b3c131db2eb1df2df67
font_01_sfnt_off000136e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136E9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014efb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EFB 17948 bytes
SHA-256: ba749bff44f25a2f276df3ebfa05ab0a4dbae4eaedd7e2f5d50183c34628f97e