Malicious PDF — malware analysis report

Static analysis result for SHA-256 30c858fb6adb181e…

MALICIOUS

PDF

140.6 KB Created: 2021-08-03 06:51:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: dd6350949545139be191c9aeda6b68c4 SHA-1: 18485d827e9ddae3ee6213cef67103c954a89041 SHA-256: 30c858fb6adb181e4a3b1112a052a03d9930aa80bbd19726c814df81ed33b1a3
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links pointing to compromised websites and disposable hosting, suggesting an attempt to redirect users to malicious content. The file's structure and link farm characteristics indicate a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9918

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 http://sewakendragroup.com/userfiles/file/juwowazo.pdf In PDF document text
    • http://radio-salsa.com/php/rs/filesupload/file/5110392923.pdfIn PDF document text
    • https://bellevuecommunityfoodbank.org/wp-content/plugins/super-forms/uploads/php/files/d5273cbf8ade444a4b7582fa70b3f66e/38000328062.pdfIn PDF document text
    • https://laflammerouge.ch/userfiles/files/giwazagisuduwefabemi.pdfIn PDF document text
    • https://legend-chang.com/UserFiles/files/loxik.pdfIn PDF document text
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160afbe6425b6a---dogit.pdfIn PDF document text
    • https://terminarz.online/kosmetyczka/krakow/files/dogikigiluzodawitozug.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/786a2305cce5b2a888707d8ea3166227/tixurenaxasi.pdfIn PDF document text
    • https://egca.fr/userfiles/file/baxug.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0a90fa1ecd---1526479703.pdfIn PDF document text
    • https://upbilbao.com/ckfinder/userfiles/files/41743495510.pdfIn PDF document text
    • http://bhk-aindling.de/userfiles/files/pisoxejuzejudelor.pdfIn PDF document text
    • http://zonwering-belgie.eu/ckfinder/userfiles/files/lofovunezuguvisid.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfdd1408af2---30908388599.pdfIn PDF document text
    • https://nazrabilisim.com/calisma2/files/uploads/lubelatikuzazolutazamuj.pdfIn PDF document text
    • https://bloomlight.pl/_bloom/file/32292825774.pdfIn PDF document text
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/391117fe65e697ba33d0afc1c3119408/nalawisimaginibizud.pdfIn PDF document text
    • http://kahounova.cz/userfiles/file/wisikunefafejewelu.pdfIn PDF document text
    • http://eko-uklid.com/files/file/xokujizat.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a38d050aa7c---95569659194.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4463b4226a---97151205032.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/1b128825ca09f48d5b85eb2ba88f0f2c/wasumiw.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a6f7bac0d9b---16658451837.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/5c55bc43bfad06bfa7b185ba1577b69a/22080319669.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=musica+del+recuerdo+romanticas+70+80+90PDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001a8cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A8CB 11172 bytes
SHA-256: e30820e9b92fb55aa8215694354aa640d6c6195f08f3185184662bd97f638a65
font_01_sfnt_off0001c2f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C2F3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001db04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DB04 16092 bytes
SHA-256: 9d5144547e0b729630886a3ad3ce48e7da84b0115899dd9c2390406af6f0fecd
font_03_sfnt_off0001f045.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F045 20060 bytes
SHA-256: 65a8cd05565151abb56a213bcde712ac22a7ec674e60adfab339018126533fb4

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