Malicious PDF — malware analysis report

Static analysis result for SHA-256 68997788d629a41b…

MALICIOUS

PDF

78.0 KB Created: 2021-09-07 11:29:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 910a5be57657ded97ee08d2ada0605cf SHA-1: 9bf275248a01207228b9164b92437a10cc61f0e1 SHA-256: 68997788d629a41b6993a391e5d6c5c19d5dd1680e019a6da77059dde32682b6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and embedded links are indicative of a malicious document, potentially leveraging embedded JavaScript for redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://harkakotony.hu/UserFiles/file/rulajaxaz.pdf In PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070c6f770306---jesibamesexevuvol.pdfIn PDF document text
    • http://autoscuolepintozzi.it/userfiles/files/zeral.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609122f50fb47---89637582797.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/160855cbd29902---88317521610.pdfIn PDF document text
    • http://montpellier-business-plan.eu/mbp/upload/images/images/upload/ckfinder/jesed.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160db5f84b866f---30057230132.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/7dbbb0163e4d8f11dbf24556d2768889/lizutotus.pdfIn PDF document text
    • https://kitapkaplama.com/upload/ckfinder/files/3129411200.pdfIn PDF document text
    • http://cimkezes.hu/uploads/ckfinder/userfiles/files/49053828952.pdfIn PDF document text
    • http://dermatologomiguelgallego.com/miguel/fck/file/mowimopufokorotawimuwev.pdfIn PDF document text
    • https://annjulieskarpmo.com/userfiles/file/85898094000.pdfIn PDF document text
    • http://hoangle.vn/uploads/userfiles/file/81514228683.pdfIn PDF document text
    • https://fleschimmo.lu/userfiles/files/lopiva.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a8084ae32a---zagawusoperowodeg.pdfIn PDF document text
    • http://hoanggiaphatland.com/uploads/image/files/67413123911.pdfIn PDF document text
    • http://telekommarketing.com/firme_data/files/80985821915.pdfIn PDF document text
    • http://thebaileyfamilyreunion.com/clients/6/6f/6f45d7e5c9279c15d0bd3a3fa6949618/File/ralozugilu.pdfIn PDF document text
    • http://domki-kopalino.pl/pliki/94280375889.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160c3e6d4f0b78---95175315014.pdfIn PDF document text
    • http://footstepfloor.com/upfiles/files/55677846538.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/16096fdd385166---42204500311.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=uttar+pradesh+police+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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c30d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC30D 18124 bytes
SHA-256: ecd15813ae60bd0ff0588236e23df9f7a4aecdf754ec3e076e1ad68814ea1369
font_01_sfnt_off0000f1ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1AD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000109c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109C4 10620 bytes
SHA-256: 6e7a9157ac1e317bb249602fab62d45b79a1b809b4c1b32e09a46e900eecef34
font_03_sfnt_off0001221e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1221E 1684 bytes
SHA-256: 9c928bf144e3eec6b0e52ae2bba533670589b2228405e28e178bb89e049a64b1

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