Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a85bb2a5cdc2b37…

MALICIOUS

PDF

89.6 KB Created: 2021-08-15 17:25:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 42183f4dedb9932b55c9fb0c6ceeee74 SHA-1: 93a67708a789812854e433e1ccab50a36e281065 SHA-256: 3a85bb2a5cdc2b3737098b46e56f335e0a21c944ffa929a00d1e01e498bd4405
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The heuristics indicate the PDF contains a link farm pointing to compromised WordPress upload storage and disposable hosting, suggesting a phishing or malware distribution attempt. While no scripts were explicitly extracted, the nature of the link farm and the detection name imply the PDF is designed to lure users to external sites, likely for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/1607819db88c6c---tilak.pdf In PDF document text
    • http://dambi.pl/userfiles/file/lekexekiketudu.pdfIn PDF document text
    • https://soportedevida.mx/ckfinder/userfiles/files/woxugozevoxipikoxoge.pdfIn PDF document text
    • https://tessuno.com/upload/files/60f94d1166ecc.pdfIn PDF document text
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0044344f3c---9968430977.pdfIn PDF document text
    • http://ghalemdi.com/userfiles/file/30297413085.pdfIn PDF document text
    • http://bayernglobal.de/userVZ//file/16206124586.pdfIn PDF document text
    • https://betenagro.com/sites/default/files/file/gigesufadowimipojazo.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/cef0d6e3e6b9159b8e5762314ca8dc09/xanen.pdfIn PDF document text
    • https://anmoul.com/userfiles/file/40713070796.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/160c2973a4d2bf---wusofefarokifawonufutuvez.pdfIn PDF document text
    • https://eprobatdz.com/ckfinder/userfiles/files/fuxofejiladigujuv.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/45f4672a1a22574ec0ea0eefcb72e967/7161701245.pdfIn PDF document text
    • http://gapoom.com/upload/fckeditor/file/ridoroxesesawedudu.pdfIn PDF document text
    • http://drive4smilesontario.com/clients/e/ed/ed023a0734c265ca673a92d1d81de675/File/zanadunibul.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e305332b73---fipasizuzemepadawezu.pdfIn PDF document text
    • https://fsreloading.com/userfiles/files/xadokurovafudotaxog.pdfIn PDF document text
    • https://sunnyvale.com/wysiwygfiles/file/90098473251.pdfIn PDF document text
    • http://gibisch.org/files/files/68402527565.pdfIn PDF document text
    • http://daiichilogistics.com/uploads/news_file/zudujukaxovew.pdfIn PDF document text
    • http://nw-line.ru/generic/uploaded/69048165454.pdfIn PDF document text
    • http://mtlebanon62.com/clients/5/5e/5ee551a8be14a26d7d76bc5e90dd1372/File/fusuwimewexararolet.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/a09ff100005d5a0b7a84a15c4504a4fe/88432158228.pdfIn PDF document text
    • http://m-camper.ru/ckfinder/userfiles/files/kakuxekumuxijosawe.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160738a346cef7---88740897868.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=toyota+highlander+hybrid+xle+2020+pricePDF 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_off0000f6f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F8 11184 bytes
SHA-256: a0ff86e0bbdc55e503beec5d44d6a2a848d9037439d779307bce54c56c260708
font_01_sfnt_off000110ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110AD 17672 bytes
SHA-256: 4be422b20e945da6f5db9721d31b752ab3a1b756c5bb0f6f28b6535bfe744e53
font_02_sfnt_off00013f44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F44 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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