Malicious PDF — malware analysis report

Static analysis result for SHA-256 0670a70f7ab189dd…

MALICIOUS

PDF

90.1 KB Created: 2021-08-01 19:15:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 64e13680cb8d1f958f08bc2b57aa0b47 SHA-1: 1f1062d3a6174940db8588181b36f9ae7c96163b SHA-256: 0670a70f7ab189dd5c2bf00ae06419c67b578bd109eb4ab648b2e5c241e403c5
196 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The presence of a security bypass heuristic indicates the document attempts to instruct the user to disable security software. This suggests a phishing or social engineering attack aimed at lowering the victim's defenses to facilitate further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/qnclum7o293p0cm49fglaqec66/12956001418.pdf In PDF document text
    • https://bodegoncriollo.com/userfiles/file/8035133414.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/f8eced4f07ffad1e49c384b70ed1ceb5/33626139142.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/f7e878075558395dfdb5d695a446d3a8/debasufoxewivanekeruti.pdfIn PDF document text
    • https://www.syah.org/wp-content/plugins/super-forms/uploads/php/files/dd8472c695921f1607537772e5beeaef/nadujemafesakotisovajege.pdfIn PDF document text
    • http://zrdb-drogbud.pl/Upload/file/67168240006.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160777123688be---fitixolusonojika.pdfIn PDF document text
    • https://www.engltg.com/wp-content/plugins/super-forms/uploads/php/files/b6ff0159349d025846a05d4306cd4e6f/mosebipivusidak.pdfIn PDF document text
    • https://soudurelauziere.com/upload/editor/file/kazexolaxufodutelazupeta.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f8adede3a9e---39197390977.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607da7b3262b2---disebu.pdfIn PDF document text
    • https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/2b01916419a44408348df8df642d2a73/boramevemuxidelewowigago.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a394acfab4---79827021610.pdfIn PDF document text
    • http://reelproductionshd.com/userfiles/file/49307803715.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/36f56bdc4fdd572479f1653e5843e88e/pabidagezo.pdfIn PDF document text
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084d12976297---27007788716.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/3228ca3160342958ee59c62c8fa9cbc1/33532540422.pdfIn PDF document text
    • https://airbays.com/userfiles/file/wowoxofexasilanarebodu.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16071539136ca2---24915466325.pdfIn PDF document text
    • https://rolcsi-bau.hu/userfiles/files/muweketisuxu.pdfIn PDF document text
    • https://www.myosiaffiliate.com/199trust/img/file/12154104422.pdfIn PDF document text
    • http://macabrey-luthier.fr/data/Files/63555029005.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074c5bbc0c1f---77956275980.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/e4845040ac75e25692c4296d6de245ef/jawebavagudodimifimuf.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b9823901e6---11886089548.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=adjprog+epson+l220+free+downloadPDF 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_off0000fa90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA90 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000112a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112A2 17384 bytes
SHA-256: 5550e0e9563ce18446b9a3e0af79615c2b84e51367eee8d24a13720a77875c07
font_02_sfnt_off00014088.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14088 10924 bytes
SHA-256: 9b73530d038c3ddeb6983a3d59277a0b6b6599bfb8d392dad430ca02d71adcd6

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