Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2f6f0524b44c527…

MALICIOUS

PDF

80.3 KB Created: 2021-10-12 14:15:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: cce263edc0116e854d3ccb9b9d3633fb SHA-1: 71c5d00272842ebdc411266f82c3aad58793c5b0 SHA-256: b2f6f0524b44c527fb006dbc87e42b415a1cb48eab359ae824a9742bee07d334
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to domains that appear to be part of a link farm, as indicated by the PDF_SEO_DISPOSABLE_LINK_FARM heuristic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or distributing further malware. While no scripts were explicitly extracted, the nature of the embedded links and the heuristic firings point towards a malicious document designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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 http://sunmoon-glory.com/web/upload/files/luwidetetegatod.pdf In PDF document text
    • http://tokyoracing.hu/userfiles/file/joxovegozazesuzogozamo.pdfIn PDF document text
    • https://angelsforwarriors.org/userfiles/files/52608848690.pdfIn PDF document text
    • https://tidurmalam2.com/contents/files/difevozil.pdfIn PDF document text
    • https://ihappywash.com/uploads/files/202110120138508093.pdfIn PDF document text
    • http://samuiluxurytravel.com/Uploads/file/basonezekegivewuzudizi.pdfIn PDF document text
    • http://askort.pl/Upload/file/bejumakefisu.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/d9a55fe88c860e503245d8da35d534c5/28786061683.pdfIn PDF document text
    • http://atrsara.ir/resource/files/kosajetozosexefilavodewos.pdfIn PDF document text
    • https://ruh-center.ru/userfiles/file/60216467845.pdfIn PDF document text
    • http://hausdergesundheit.net/userfiles/files/bagopowowarupibelabilula.pdfIn PDF document text
    • http://namhungholdings.com/uploads/ckfinder/files/fiwodalugurexokovemibobi.pdfIn PDF document text
    • http://acrclubinversores.com/files/galeria/files/19449022757.pdfIn PDF document text
    • http://pujcovnanaradi-tvarozna.cz/userfiles/files/kakogas.pdfIn PDF document text
    • https://veriniams.lt/userfiles/file/vusetarusazamatositomig.pdfIn PDF document text
    • https://xnkvinatimex.com/uploads/files/lidovazafunukerosixipotu.pdfIn PDF document text
    • http://jedzenie365.pl/ckfinder/userfiles/files/wuxurox.pdfIn PDF document text
    • https://inprovitparaguay.com/ckfinder/userfiles/files/wipenatijewesom.pdfIn PDF document text
    • https://perfecthospital.net/ckfinder/userfiles/files/ligovopus.pdfIn PDF document text
    • https://perfumes.dropship-tracking.com/userfiles/files/pakusobijibepeg.pdfIn PDF document text
    • http://groupelamiri.com/uploads/FCK_files/file/45736728603.pdfIn PDF document text
    • https://ww170001.linebot.net/upfile/files/20211001153605.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Gsjc/~3/5bhJmFgkeCE/uplcv?utm_term=limited+edition+coralsPDF 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_off0000d1c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1C7 10488 bytes
SHA-256: 6f6843f870763ec3354e955b69a0e0aa449c93401cb1c71a9843c318c6b249a8
font_01_sfnt_off0000e98a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE98A 18992 bytes
SHA-256: e240a091b5a9120d585d7939bd471ce95e8d1ff2e39c83c76745f0ba3c7d15c3
font_02_sfnt_off00011b60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B60 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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