Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab3fc77f95cf52ca…

MALICIOUS

PDF

75.3 KB Created: 2021-09-02 16:21:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 9bb4a001aaf4620dba79e0086a07b466 SHA-1: 8f7e15f076ed15fcf1d9bcdf3b6b2f5462609063 SHA-256: ab3fc77f95cf52ca7764e7ec293c1fdb126401f9eecb0bcdffc5b2ac44346b4b
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs that point to various websites, some of which are hosted on compromised WordPress upload directories. The primary purpose appears to be directing users to potentially malicious content or phishing sites through these embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://gdwtechnology.com/fckeditor/file/13301330790.pdf In PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cb10a28148---jebatuvi.pdfIn PDF document text
    • https://indiantalentjunction.com/milan/media/woniledalidekupakekezizi.pdfIn PDF document text
    • http://curtisfamilyfun.net/clients/e/e0/e02f67ab5b6879a7eb6c21a3163f7106/File/5033110481.pdfIn PDF document text
    • https://tecnibat.net/uploads/archivos/zegapujiverek.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160901b3fc33f7---dozega.pdfIn PDF document text
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087b73fbf5d1---ruboxosiluwitidamuja.pdfIn PDF document text
    • http://kaithompson.com/userfiles/file/17892253854.pdfIn PDF document text
    • http://sspvjd.com/FileData/ckfinder/files/20210709_4974ABABF12F9105.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8a4fb60f0d---sipezotoxowodit.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ed3b9359d0---85582749760.pdfIn PDF document text
    • http://araonline.hu/uploads/file/dadinaz.pdfIn PDF document text
    • http://www.velkoobchod-man.eu/ckfinder/userfiles/files/3668512567.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/0144e8ca9c4788a4a32b9b24a430b709/bijenat.pdfIn PDF document text
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/5a456fdebc39dedc38971bf57be8af32/80059020166.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/16081fd2780164---vafalidugixe.pdfIn PDF document text
    • http://xtra360.net/campannas/file/petobetuwenilipapojemodap.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/hnur3nkrg54g9lnhnscmqsrer5/4660385765.pdfIn PDF document text
    • https://armenia4d.com/contents/files/20139666398.pdfIn PDF document text
    • https://samsungklima.net/upload/ckfinder/files/papawaxun.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607cf04420bcc---sonudimodu.pdfIn PDF document text
    • http://www.sealjet.mn/pictures/files/90529982287.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d8cc8fc01d3---12183875502.pdfIn PDF document text
    • http://akicgiyim.com/userfiles/file/nuzawitivubavu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=neurones+miroirs+pdfPDF 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_off0000c18a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC18A 10432 bytes
SHA-256: 5673223e51a6aac4e6fd84bef8e75436cc7483dc4e36a660b5a86b7090145553
font_01_sfnt_off0000d919.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD919 17552 bytes
SHA-256: 31855e105bcbeb4f07f8f26c7b5f71dd42863d50db1d4b27aedb7a1211c0b449
font_02_sfnt_off00010652.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10652 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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