Malicious PDF — malware analysis report

Static analysis result for SHA-256 976dff8fb1ca7b3f…

MALICIOUS

PDF

83.3 KB Created: 2021-09-01 15:03:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 0d991cc7b3c218067246e4d2f7cf7bdd SHA-1: 9950a8cef589345944189c77f862d8beb1044eb1 SHA-256: 976dff8fb1ca7b3f87f9680174003d97e48a0f77546a01cb49109fa67574e889
156 Risk Score

Malware Insights

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

The sample is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to numerous external websites, many of which are hosted on compromised CMS platforms or disposable domains. The primary goal appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://fvhs1970.com/clients/876770/File/pakepunonopalirosebi.pdf In PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/0gltare1ehqkso14nga3t41cu1/gikebosojagamorutujosoru.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/30b09366936320fcbe110f43b12cbdd3/bewebopadojuguwi.pdfIn PDF document text
    • https://fullhousetourism.com/UploadFiles/file/20210727225301189.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/he5g5ofcmla5r5g9dr5gtc5ibe/waripizenelobute.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/7554453884.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16099eacabaa29---96374098609.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/c0606404a7f4f838bffad0e5628e8727/sapox.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e3fe5a321f---18373015683.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e5f33095863---rimapemonetorawagi.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b10c91b9cd7---65421730105.pdfIn PDF document text
    • http://iseveranscopy.com/upload/editor/file/xepanexodevojabitefiwiri.pdfIn PDF document text
    • http://zs-oilfieldequip.ru/d/files/lesuzaluragagovomezinorot.pdfIn PDF document text
    • http://mgocsm.in/userfiles/file/41264796166.pdfIn PDF document text
    • http://tlumacz-bialystok.pl/pliki/file/xavuwamevozesibewijutusoz.pdfIn PDF document text
    • https://alnahamgroup.com/userfiles/file/25759832194.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/e3840ac17d8b77971f98776063d320d3/9492158210.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/b465e47866453945d2700e54cc8b90a8/tesipox.pdfIn PDF document text
    • http://chretkinia.pl/userfiles/file/kosedexuruzotuvafusugaj.pdfIn PDF document text
    • http://criollo-cocoa.com/userfiles/file/kakoroguxonifekugal.pdfIn PDF document text
    • http://mgocsm.in/userfiles/file/60448242843.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/e5b8260a60be3d4ac38cf9d9d093afe0/xolivaxuxojugebekupegorud.pdfIn PDF document text
    • http://minerva-collection.net/files/files/31448716419.pdfIn PDF document text
    • http://lezeckastenakosice.sk/upload/files/87766758038.pdfIn PDF document text
    • https://asiajitu.com/contents//files/14753731529.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=florida+rules+of+civil+procedure+request+for+productionPDF 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_off0000e0bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0BC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f8ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8CE 17148 bytes
SHA-256: 024ff7b281da46ac3e03288a2ab0ab86367b9c0caa18c52505da62746a438e25
font_02_sfnt_off00012508.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12508 10900 bytes
SHA-256: 44e4ade36f5fe3ec98176aab5876b6067693f30f00ad4d66317d267818fc2bb5

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