Malicious PDF — malware analysis report

Static analysis result for SHA-256 629075dc741cfa42…

MALICIOUS

PDF

76.3 KB Created: 2021-09-01 02:53:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: abf093b40bacd565241501659827a89f SHA-1: 7f06004ef77d42c9a83e5d66bfda4c37dadc6c52 SHA-256: 629075dc741cfa42705a4722973e9a8b743a6175e5c5f74a647a942e4a11a188
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites or disposable domains, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious content via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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://badgerhillfarm.uk/52859031648.pdf In PDF document text
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/160934ded6a69b---27117510015.pdfIn PDF document text
    • http://lungshingcentre.com/userfiles/niperigi.pdfIn PDF document text
    • http://chatfieldfarms101.com/userimages/38087916134.pdfIn PDF document text
    • http://webursitet.org/Files/file/10400422584.pdfIn PDF document text
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607098aef05f0---ritigopirilomobaxaj.pdfIn PDF document text
    • https://neksav.com/upload/ckfinder/files/turevepesudi.pdfIn PDF document text
    • https://www.m2asolutions.com/wp-content/plugins/super-forms/uploads/php/files/f42eeadb8bb576b9440da4c1275d8965/woxopobapinex.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fcc7a0f354e---87955627835.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a9a6dda7e3d---55580306467.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/d4f2fa937d2ca03c7a70565fcb3b6451/23394342522.pdfIn PDF document text
    • https://travelworld.ro/userfiles/file/kelover.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160771e7383c58---62559021591.pdfIn PDF document text
    • https://hotelreviewreserve.com/basefile/hotelreviewreservecom/files/66558105307.pdfIn PDF document text
    • http://sage-chem.com/image/files/20210814_202001.pdfIn PDF document text
    • http://sibinetweek.ru/userfiles/file/97678211498.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160897758d8564---mepanimamibadawumaruniso.pdfIn PDF document text
    • https://avonsteel.com/UserFiles/file/50359245656.pdfIn PDF document text
    • http://alhouti.com/userfiles/file/3721676960.pdfIn PDF document text
    • http://fecoil.com/userfiles/file/41774034442.pdfIn PDF document text
    • http://kientrucphatloc.com/upload/files/bufopilonajelitewom.pdfIn PDF document text
    • https://xn--pssa17sw71b.tw/upimages/files/jipikaxajemuwow.pdfIn PDF document text
    • http://www.alexgis.com/siteuploads/editorimg/file/43302019633.pdfIn PDF document text
    • http://qataminational.com/uploaded_files/userfiles/files/velemagajipipupubefotejoz.pdfIn PDF document text
    • http://whitepurdeespires.com/clients/b/ba/ba703c466af5784ee38134b9d09df413/File/dogegugela.pdfIn PDF document text
    • https://www.burnat-provins.ch/ck/ckfinder/userfiles/files/zasadubet.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=mindset+and+weight+lossPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c9b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9B8 16284 bytes
SHA-256: 1dc3fdff0b9dc182afcbafa3ff4e0fb5a52f7cbd2783db6009fd4226c7c70ae8
font_01_sfnt_off0000f39c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF39C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010bb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BB3 10504 bytes
SHA-256: ab2578320febc5b9d0a51ef18b7eef59f4484aee7df97f204726fcd816576066