Malicious PDF — malware analysis report

Static analysis result for SHA-256 80c0f895c8b1c8d9…

MALICIOUS

PDF

80.3 KB Created: 2021-09-16 21:26:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 44ee55b8590fe7dece7d4557a5552804 SHA-1: b7bd579a77957a13c475c8ad080adb4ab7f7a84f SHA-256: 80c0f895c8b1c8d9e0965b10124d43f577e5e692b62c051f6d09e13821866982
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external URIs, many of which point to PDF files hosted on distinct domains, indicating a link farm designed to deceive users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a malicious workflow, potentially involving JavaScript for redirection or exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://www.chablis-gautherin.com/ckfinder/userfiles/files/38999200567.pdf In PDF document text
    • https://impulsa.mantareys.net/uploads/plantillas/files/gepogibowiropuwat.pdfIn PDF document text
    • https://eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/nokafogi.pdfIn PDF document text
    • http://seamacros.com/upload/file/lugativezamawokagulujidep.pdfIn PDF document text
    • http://microcement.ua/userfiles/file/70380920248.pdfIn PDF document text
    • http://adas-muko.pl/photo/file/39605767612.pdfIn PDF document text
    • https://www.ebenisterie-burette.com/ckfinder/userfiles/files/xeraki.pdfIn PDF document text
    • http://ambvetfanini.eu/userfiles/files/2796915472.pdfIn PDF document text
    • https://telliogluhukuk.com/userfiles/file/rujozezo.pdfIn PDF document text
    • https://nazragame.com/calisma2/files/uploads/65082512239.pdfIn PDF document text
    • http://tvoirostov.ru/ckfinder/userfiles/files/49003112218.pdfIn PDF document text
    • http://theofficeplus.com/userfiles/file/xiwonuzixut.pdfIn PDF document text
    • http://boki.hu/editor_up/vejakaxovab.pdfIn PDF document text
    • http://s-pack.kr/userfiles/file/20210913141420.pdfIn PDF document text
    • http://vividconcept.in/userfiles/file/wavusizujidividal.pdfIn PDF document text
    • http://reicar.dk/userfiles/file/53877977786.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/b87c4bbb2c44e235cf628f063a22e525/52202394161.pdfIn PDF document text
    • https://oklogistic.lv/upload/file/3313710303.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/e0a02795cead3fa911cda5a7816bbd9d/limepagalubixekim.pdfIn PDF document text
    • http://tpfish.com.taipei/archive/upload/files/10178830961.pdfIn PDF document text
    • http://aromamahabaleshwar.com/ckfinder/userfiles/files/pasikomozu.pdfIn PDF document text
    • https://serpavenger.com/ckfinder/userfiles/files/fimozuwudox.pdfIn PDF document text
    • http://k9careclinic.in/ckeditor/ckfinder/userfiles/files/gumevipajobibaxisefisu.pdfIn PDF document text
    • https://playworkspartnership.ca/sites/default/files/file/wawakaze.pdfIn PDF document text
    • https://questyme.ca/userfiles/file/41910479677.pdfIn PDF document text
    • https://podereilmontaleo.it/writable/public/userfiles/file/jupopewapajudowaxe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=how+to+see+a+private+instagram+pagePDF 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_off0000d67f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD67F 16932 bytes
SHA-256: c8c86cbbc28c036daf9e7e1541232293546d9482f4c4989c0ad7c18ad23b9f7b
font_01_sfnt_off0001024d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1024D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011a64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A64 10692 bytes
SHA-256: 4d0a3d11be15e9942dc0c0297c5fd2a8bcde56a7cc14168dbf2ab32b3c40abb5