Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5ed9a765e9e5646…

MALICIOUS

PDF

109.5 KB Created: 2021-07-17 23:21:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 3b5361d3230d33c415722492fec9d9ea SHA-1: 60357838b0b33520e4ca2830d39598074556ff66 SHA-256: c5ed9a765e9e564646230a690bec0689bd168acaae0902843f49202ec636b0f2
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to various domains, many of which appear to be compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the presence of numerous external links suggests an attempt to redirect the user to malicious sites, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9664

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://ajwatravel.com/wheelmarine/userfiles/file/boxexugazozotosavofanivi.pdf In PDF document text
    • http://karthikeyanjayaram.com/userfiles/file/rovamikulamojoj.pdfIn PDF document text
    • http://onlinecommerce.bg/uploads/pages/files/xiligajenavubidofikive.pdfIn PDF document text
    • https://atkarisuli.hu/userfiles/file/9921451484.pdfIn PDF document text
    • http://tiwtactic.com/userfiles/files/lusajejanuviwib.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/59ba9dd5e7a40b8788d92704a359ae13/45277348679.pdfIn PDF document text
    • https://agrilaui.com/userfiles/file/dokixedorejone.pdfIn PDF document text
    • http://yjsyrj.com/userfiles/file/47135122141.pdfIn PDF document text
    • https://www.helmmsp.ca/wp-content/plugins/super-forms/uploads/php/files/fea52b92b748268a17e9472a074095bb/roledeguxuvomokagetenura.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dc92b85f801---daramidizuzakigebesuge.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/160cfc59b94e3e---66037383896.pdfIn PDF document text
    • https://mrmusicfoundation.org/wp-content/plugins/super-forms/uploads/php/files/rpa30ffg64jf7ibno06qdajs94/84648108576.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d2682057c5f---1683559277.pdfIn PDF document text
    • https://aimhc.com/userfiles/file/belufiwizilulubosotakazel.pdfIn PDF document text
    • https://visionbrindes.com/admin/fckeditor/userfiles/file/57828487810.pdfIn PDF document text
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/fcn62cnqn3gd5d81cgu4j5ltis/79974786193.pdfIn PDF document text
    • http://www.cenlaenvironmental.com/siteuploads/editorimg/file/litevemador.pdfIn PDF document text
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/160e18035e830c---32156035799.pdfIn PDF document text
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a0f151a0615---83287605130.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c395524a32---tujiri.pdfIn PDF document text
    • https://yssnewlessons.org/UserFilesTwo/file/50471630278.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/1d95f5918ff37a0fe0f9cef8c63bf857/jovozetatutubezagolowave.pdfIn PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/63c136a817f804b44093b787656be49c/vuxatosotase.pdfIn PDF document text
    • http://netmutum.com/userfiles/file/rowovadoxinazuwilemet.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=the+kgb+and+the+world+pdf+downloadPDF link annotation
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001246a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1246A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013c7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C7B 16164 bytes
SHA-256: fd494554c7a7a2c4488382a78096c535ff133766c7221992be4f6a58596b2467
font_02_sfnt_off000151f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x151F2 10800 bytes
SHA-256: 71bbe238adbc5c49e66b9d0bf3da454ceea9761d54b259b5310cac25246b2816
font_03_sfnt_off00016a69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16A69 18488 bytes
SHA-256: 56a917878ccb9b4fdcafe8ddd606fffb6d448db210061e81f958a7018e0b0523
font_04_sfnt_off00019b4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19B4E 2892 bytes
SHA-256: f9fb93a3df7d10567a97126d20105064ea95dc26c16fbcc6d1f48327265e2111

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