Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3b9e47e0d7b36b8…

MALICIOUS

PDF

94.1 KB Created: 2021-07-16 03:41:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2d9ecde0afaa93758b8dc68ce2fee7e5 SHA-1: 6909ab1cf8db56b1695b0f0cb5994114b4506efa SHA-256: e3b9e47e0d7b36b89c5545a715d4dd80786662039f9a85e74274eea0a356a9f9
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it likely exploits a vulnerability or serves as a phishing lure. The heuristics reveal it functions as a link farm, pointing to numerous compromised WordPress upload directories and other disposable hosting sites. These links are likely intended to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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 https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/d632f1dbea78280179a585131f835711/ludokek.pdf In PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/d6aaf707e2c7e47c790e74fbf3608628/82219803403.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1607ffce39f9b4---bonegapedebowej.pdfIn PDF document text
    • http://bajcsidavidfoto.com/_user/file/30363050319.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/e851de0b64f5d956ee20b779b2364dd6/godubev.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b439eeb6ad1---47838240933.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16074803769e9a---90846803755.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080009a7c594---3665921815.pdfIn PDF document text
    • http://bayernglobal.de/userVZ//file/48921426408.pdfIn PDF document text
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/kpmen0joc1jo1n3d1d7rvnbvb6/xikoxuji.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/3e1e9d049a71e6fc71d5e9a13bebb21c/wojutamuf.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d1b1463dd7---rexefona.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/2767dcd9560f70dd04a4c97451d70be7/92097220976.pdfIn PDF document text
    • http://hzjksj.com/images/upload/File/95916504117.pdfIn PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/d94e3ffsb13rt0g7n8jj4eh64t/juxoxulolovu.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba4e6b1bce5---37143212680.pdfIn PDF document text
    • http://terredellamagnagrecia.com/userfiles/files/57436692384.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b55dbdc8ace.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/160e9061b5ffd8---migoxumafafekelume.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/nkmnqlloiult6ll09s86l1mte1/raximavudedivigi.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/d5d2f10c8958c7417530fdb485dcb7fd/14162468759.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/7d11a5895784ebf6fa105b20677bc9aa/43597643088.pdfIn PDF document text
    • http://lukasikgroup.pl/Image/files/48099555353.pdfIn PDF document text
    • https://www.spreefahrten-berlin.de/wp-content/plugins/super-forms/uploads/php/files/ldkhc2u27j1a2svko23in44i5v/fuvelerimabenupojaxibe.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607df84679176---63027203217.pdfIn PDF document text
    • http://abwpetersburg.com/uploads/files/rebavamanafixuwas.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=new+national+education+policy+2020PDF 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_off00010afd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AFD 17324 bytes
SHA-256: 9ee1368177ec365bdc4cf87d1146e988d830d73f1696287c935172db401eee53
font_01_sfnt_off0001385a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1385A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015071.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15071 10760 bytes
SHA-256: b86bdafd9c757c3c281e1db693550ab59f9cf24b769546c52a28d0ea23284e3a

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