Malicious PDF — malware analysis report

Static analysis result for SHA-256 332b7237fb64d17e…

MALICIOUS

PDF

85.2 KB Created: 2021-09-06 08:07:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 9b1976bb7815371eb976a54d48bcf7ef SHA-1: 42acf618847b0f27e042d8d2706b75ae005a6959 SHA-256: 332b7237fb64d17eca1065b2e6758b9b9098acba21195392f60fd9a42e24be3a
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to various websites, including those hosted on compromised WordPress installations. The primary purpose appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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://allytemp.ru/uplcv?utm_term=crossword+puzzles+for+high+school+students+pdf PDF link annotation
    • http://n2nlah.org/UserFiles/file/kawewibun.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2f5b06f4cc---fanoguwevakejitofalekod.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/b261ec0e6ba8e491f3013527520c80ec/nagawakowuvonun.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/12467903bfcb63cf9d07f59f9225014f/zopopamukunubefimudosuru.pdfIn PDF document text
    • http://jhdjt.com/images/upload/File/21625264038.pdfIn PDF document text
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/16095fafb424fb---9590780697.pdfIn PDF document text
    • http://grupopiscis.com/upload/files/ludanudamemafabem.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1612a3500d69b0---jemagutevobe.pdfIn PDF document text
    • http://ac-kenigsberg.ru/files/file/vawamosiv.pdfIn PDF document text
    • https://equantumconsulting.com/files/files/88124378341.pdfIn PDF document text
    • https://dragonexpressml.com/userfiles/files/bowakolezuxo.pdfIn PDF document text
    • https://ozsersogutma.com/upload/files/ganodogapifireguri.pdfIn PDF document text
    • https://adepotcustom.com/UploadFiles/file/20210504075315128.pdfIn PDF document text
    • http://studionegro.net/userfiles/files/33225836252.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/1k1139eka0k1dqr97n031nf580/77861553150.pdfIn PDF document text
    • https://mindspacepsytherapy.com/upload/ckfinder_temp/files/20210530081229.pdfIn PDF document text
    • https://firsatoyun.com/calisma2/files/uploads/faxixadimomu.pdfIn PDF document text
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fa0ec067071---tisirafitanipuralufalobe.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/o7r4dpsrnddbdpi24v77vnvd0j/mebewolurododudu.pdfIn PDF document text
    • http://asupuro.com/upload/save_image/files/84556674500.pdfIn PDF document text
    • https://drivetripper.com/userfiles2020/files/74714981500.pdfIn PDF document text
    • https://fallsplat.se/file/vujitosoxuwakowepurika.pdfIn PDF document text
    • https://www.playitdirect.ca/ckfinder/uploadfiles/files/33193478079.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/40ca1e1c26c701e0e23b5dbfd0e1b6b0/bivetikajejuvegajad.pdfIn PDF document text
    • http://autobedrijvenindex.nl/images/uploads/nutigiwenulerexizi.pdfIn PDF document text
    • http://bibliotekaludwin.pl/img/upload/files/boxotolukibopegajap.pdfIn PDF document text
    • https://sport-jicin.cz/dokumenty/boxobudej.pdfIn PDF document text
    • 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_off0000e536.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE536 18300 bytes
SHA-256: ff19ab4caeed75c39cc7399272851a6e66bfecbffbabe9fd4d805f1ce12c7019
font_01_sfnt_off000114cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114CC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012ce3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CE3 11016 bytes
SHA-256: 7b1d1f1c9c3ea346a4a68060e7f2257436ef759f4f14a5253b8a61237962c555

Open this report in the interactive analyzer, or submit your own file for analysis.