Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab2000e9e68c57e3…

MALICIOUS

PDF

87.2 KB Created: 2021-09-02 04:31:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: b93d22250203141f70bb0c1907666f50 SHA-1: b022242460761e6d4508d72d1de2e45bf35da5b1 SHA-256: ab2000e9e68c57e34f39f2feab22b639c8557b317eb3470c653fa321df068fb5
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to numerous distinct hosts, many of which appear to be compromised WordPress sites or disposable hosting. The primary purpose seems to be redirecting users through these links, likely to a phishing page or a site hosting a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160aa0ba4ce842---99889196158.pdf In PDF document text
    • https://vico-domrep.com/ckfinder/userfiles/files/zogokepesavepejevibalijez.pdfIn PDF document text
    • https://www.reachcast.ca/wp-content/plugins/super-forms/uploads/php/files/0048a2c54808190c3ebd04dfd2996923/dazifofoj.pdfIn PDF document text
    • https://togeltop.net/contents/files/jafuzebetorodufug.pdfIn PDF document text
    • http://peusch.lu/userfiles/files/43318825124.pdfIn PDF document text
    • http://unibeauty.com.br/ckfinder/userfiles/files/zofujujun.pdfIn PDF document text
    • https://tecnibat.net/uploads/archivos/bivijeninexapunudutuneguj.pdfIn PDF document text
    • https://grand-forge.ru/wp-content/plugins/super-forms/uploads/php/files/ea796fcc195a0fcf08b675dae270e49b/86922893590.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c0facfbed28---xazowonunupifutak.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1609f5881ee067---55969787267.pdfIn PDF document text
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c5f3989945---tevidabujikepenesilugev.pdfIn PDF document text
    • http://vom-ragnaroek.de/uploads/file/zokugikowizakatorurakeju.pdfIn PDF document text
    • http://wignaccent.com/FCKeditor_2.6.3/userimages/file/20210715085735.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609f6de8715a1---tunepurabomu.pdfIn PDF document text
    • http://jagatjyotischool.org/jagatjyotischool/userfiles/file/fukulufewuli.pdfIn PDF document text
    • http://sanitaerprofi.ch/fckeditor/editor/images/file/1203113233.pdfIn PDF document text
    • http://loveperfectionschool.com/upload/file/fujezasebodedupij.pdfIn PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/c0faa7d78b5dc0e05bc88c7c0f1b6f04/denefiw.pdfIn PDF document text
    • https://oklogistic.lv/upload/file/84440384772.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0465dd4a44---2116724938.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/1c7d2673791598fb27ce6e2510e9752c/35151765206.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1612341854bb7f---bewudisekoxojizimufejun.pdfIn PDF document text
    • http://indianspringhomes.com/userfiles/files/nosukuwexi.pdfIn PDF document text
    • http://mirandatutoringcentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160778a0b3548a---buzelifitefivizopiso.pdfIn PDF document text
    • http://vo23.ru/upload/file/99459276849.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=ps3+yellow+light+of+death+hair+dryer+fixPDF 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_off0000ed9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED9D 17808 bytes
SHA-256: cb519400a89855e9aa3e9ef6a8b703bf91b8287e020306629f0fa3c23f303f6f
font_01_sfnt_off00011bc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BC3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000133da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133DA 11004 bytes
SHA-256: affc30e25a67526c05c2674fe19a72c62a49205a505c3a40158cabc2cd7c4c4c

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