Malicious PDF — malware analysis report

Static analysis result for SHA-256 1de7df2377809fee…

MALICIOUS

PDF

78.2 KB Created: 2021-10-17 18:52:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: a00c0452838f7cb64279d3ec260219aa SHA-1: 24f1ac00478da0c80ed15cbb4e1222f82a64bcc6 SHA-256: 1de7df2377809fee88f66ddc33dcb3acf4eeac2e1b523a29756d8cc08239b9e0
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many of which point to unknown or potentially malicious domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and link farm heuristic point towards a malicious document designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9844

Heuristics 5

  • 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.
  • 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://ibrahimkoc.com/images/Media/files/jumiratim.pdf In PDF document text
    • http://ancient-theater.gr/media/file/kadisijuvitopuni.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/007k39ohs2h7h9qtvvl78s2an0/xogixamimoburu.pdfIn PDF document text
    • https://www.potravinyav21.cz/ckfinder/userfiles/files/dugutakapus.pdfIn PDF document text
    • http://ampletrekking.com/userfiles/file/13569699909.pdfIn PDF document text
    • http://moiarchitekci.pl/pliki/file/lixetijubajusuxupami.pdfIn PDF document text
    • http://fresh-j.info/images/uploadedimages/file/juvogovamisufovi.pdfIn PDF document text
    • http://wojno-stal.pl/pliki/file/46248974266.pdfIn PDF document text
    • https://kingdom.vn/userfiles/file/dulof.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/n1vccvdl7e7vrfghoghrmdkc9s/lawimepa.pdfIn PDF document text
    • http://salukool.ee/upload/userfiles/file/gudebezuzasorenixivasiri.pdfIn PDF document text
    • http://kapalishakti.com/ckfinder/userfiles/files/vifumusananusurozat.pdfIn PDF document text
    • https://idd.no/ckfinder/userfiles/files/sutagowuxatik.pdfIn PDF document text
    • http://etyekilovarda.hu/userfiles/file/42340318306.pdfIn PDF document text
    • http://emblem4home.com/UserFiles/Member/File/fuxilubas.pdfIn PDF document text
    • https://botroul.be/uploads/49311509348.pdfIn PDF document text
    • http://thainightjob.com/ckfinder/userfiles/files/ruxusesurebesirugasopamum.pdfIn PDF document text
    • https://musikkursus.dk/userfiles/file/fozatixowozisadagame.pdfIn PDF document text
    • http://bike-aholic.com/UserFiles/file/jimixekewizinufarurib.pdfIn PDF document text
    • http://faurau.com/luodan/images/userfiles/file/33318577382.pdfIn PDF document text
    • https://hydratrend.com/application/third_party/ckfinder/userfiles/files/18692337050.pdfIn PDF document text
    • http://giprozdraw.ru/ckfinder/userfiles/files/nakudosekowikimamuwatugow.pdfIn PDF document text
    • http://webcertain.net/contentupload/fckeditorUploads/organization_/file/65716365631.pdfIn PDF document text
    • http://gruppocinofilomarsalese.com/userfiles/files/fekojuxapuwemogu.pdfIn PDF document text
    • http://chrislahoda.ca/userfiles/file/35213347152.pdfIn PDF document text
    • http://baiduvpn.com/upload/files/zevas.pdfIn PDF document text
    • http://budaikepkeret.hu/uploads/file/dodupugon.pdfIn PDF document text
    • http://feedproxy.google.com/~r/Xvkpad/~3/BGAemAmcdTc/uplcv?utm_term=786+area+code+statePDF 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_off0000d1f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1F8 16056 bytes
SHA-256: ebce89d00eacb106bff153e67f23e004479949af99d1430aed485b15b0ef67da
font_01_sfnt_off0000fb65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB65 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001137c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1137C 10448 bytes
SHA-256: 22463ebd07ae6e2ecc1b0dcf938533d0a85a4d5b9c9931a3191f9fdb66078f5a