Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4e0af2aed8c7d36…

MALICIOUS

PDF

84.6 KB Created: 2021-09-20 12:33:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 740edf99871027f902ad5322e0bd92fe SHA-1: 6e191a487ab7657253159e1320d123dc8a48ff86 SHA-256: d4e0af2aed8c7d36e9f721242e82844887acf2f7d5e7c38de1dd0a13edbd06d7
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by ML classifiers and ClamAV, and contains heuristics indicating it is part of an advance-fee scam. The document body, though truncated, likely contains lure text related to prizes or parcels, directing users to various URLs. These URLs are structured to appear as file uploads, potentially leading to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://tienphat.vn/imagesflashupload/file/47464739456.pdf
    • http://svaz-podnikani.cz/files/file/vewibajoguvobipewabadit.pdf
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16141931d01566---32718192530.pdf
    • https://trainova.com/userfiles/file/texilisomelasof.pdf
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613cc1e937264---tuwijimebamekawe.pdf
    • http://eclickapps.in/userfiles/files/19968005344.pdf
    • http://bibrka-school.org.ua/ckfinder/userfiles/files/punixafotoxupesagefifita.pdf
    • https://paulogomeslda.com/userfiles/file/nagosibosemafe.pdf
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/fueasv9c7vo15f9ka1fn840ho6/bofejile.pdf
    • http://aallergy.friend-match.com/upload/files/jukudunitedu.pdf
    • https://batikatravels.com/userfiles/file/12492809162.pdf
    • http://22vek-omsk.ru/fck_editor_files/files/jamir.pdf
    • http://dagmare.de/userfiles/file/lelomipufuz.pdf
    • http://zanethompson.com/userfiles/file/pevosej.pdf
    • http://fermobkorea.com/userfiles/file/20210907180720.pdf
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/16147de5980ca3---53700503139.pdf
    • http://nessium.net/userfiles/file/25593947479.pdf
    • http://bowie.abwingsmd.com/uploads/files/jodokipifejuwufaronaka.pdf
    • http://maquinandoysubastando.com/dleyes/admin/fotos/file/759606876.pdf
    • http://parvazyab.net/basefile/api203/files/48763123062.pdf
    • http://tourhong.com/FileData/ckfinder/files/20210912_13383A528308F969.pdf
    • https://kalimati.in/userfiles/file/paxufazudoxolamumewawuz.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=top+10+best+android+phones+in+india+under+10000
    • 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_off0000e5f6.bin
8020c43e4ef1d5e091150005a79603d7e33d401740fde7019f936e61d0cd295b
pdf-font-stream PDF embedded font (sfnt) at offset 0xE5F6 10820 bytes
font_01_sfnt_off0000fea9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFEA9 16792 bytes
font_02_sfnt_off000116bb.bin
27add4c6e1d146fabf43967eca10f913a5adbf454071b36feb120c8a5e0ad8f7
pdf-font-stream PDF embedded font (sfnt) at offset 0x116BB 17656 bytes