Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1c674ed8d8676f5…

MALICIOUS

PDF

82.5 KB Created: 2021-09-23 00:47:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 7a73f129fb03572b8504b67dd07c08bb SHA-1: 68926db6a68c73740c55dff3ebdbdf368628e746 SHA-256: d1c674ed8d8676f5a7db78411b735ebc50756ffad6befda67a6e734c6cce1626
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to disposable domains, many of which are part of a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The presence of embedded URLs and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggest a phishing or social engineering attack aimed at tricking users into downloading further payloads.

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://coretry.ru/uplcv?utm_term=cities+skylines+money+mod PDF link annotation
    • http://wojno-stal.pl/pliki/file/1215755858.pdfIn PDF document text
    • http://xn--b1akwe.xn--p1ai/userfiles/file/jawetigi.pdfIn PDF document text
    • http://law885995.com/upload/fckimages/file/26823311861.pdfIn PDF document text
    • http://jtg-antracyt.pl/files/file/lololozoguliva.pdfIn PDF document text
    • http://misr-consult.com/userfiles/file/wesasekezej.pdfIn PDF document text
    • http://uslugi-ogrodnicze.pl/pliki/File/76417809025.pdfIn PDF document text
    • http://liccuza.ro/stiri_files/file/67252365221.pdfIn PDF document text
    • https://lnpro.in/ckfinder/userfiles/files/semelamibefogil.pdfIn PDF document text
    • http://lindseyderence.com/userfiles/files/tumarepinowakelasiwikut.pdfIn PDF document text
    • http://aburobocon2019.mnb.mn/uploads/files/risoji.pdfIn PDF document text
    • http://carbontuning.ru/file/1153502487.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16146fbf480bda---44520515302.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/040311438581.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/damedipugexinabinasix.pdfIn PDF document text
    • http://sino-web.net/filespath/files/20210920161610.pdfIn PDF document text
    • http://embeddedhr.com/ckfinder/userfiles/files/rutukifejefogivekone.pdfIn PDF document text
    • https://e-ssuances.com/ckfinder/userfiles/files/74086123599.pdfIn PDF document text
    • http://qapoll.com/2015/vat/upload/files/56157225328.pdfIn PDF document text
    • https://www.ijestr.com/ckfinder/userfiles/files/filepufep.pdfIn PDF document text
    • https://www.artikel238.nl/emmwebbit/resources/ckfinder/userfiles/files/dakagalob.pdfIn PDF document text
    • http://studiotecnicomancini.eu/userfiles/files/87050782214.pdfIn PDF document text
    • http://vinaktv.com/storage/ckfinder/files/kemugusovarapodi.pdfIn PDF document text
    • http://www.gamylai.vn/uploads/files/21479000013.pdfIn PDF document text
    • http://darslaska.org/ckfinder/userfiles/files/mowigalazetaxizob.pdfIn PDF document text
    • http://aggengr.com/uploads/CMS/file/38822120773.pdfIn PDF document text
    • http://lapempi.nl/ckfinder/userfiles/files/gakesimemelemapuluguv.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_off0000de3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE3D 17856 bytes
SHA-256: 44d58b7ca16b9b76b612f37b9efa983ad7a8be65775892349529652d8ac994a9
font_01_sfnt_off00010c7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C7E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012495.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12495 10384 bytes
SHA-256: deced9a89e970feb055e36e9e7f4f37f89a57059020af775b447f877812177be