Malicious PDF — malware analysis report

Static analysis result for SHA-256 dce5eb8efa612487…

MALICIOUS

PDF

70.7 KB Created: 2021-09-29 09:52:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: adbda93d0a5d5f3a01e3d6bc5d2122c5 SHA-1: 411dfbafe3a97319736d5322a3fec5e411931caf SHA-256: dce5eb8efa612487c64aa173a379227506ba58d88ef6605aacf60ba23debdf63
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a malicious PDF by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded links, many pointing to unknown or potentially malicious domains, suggesting a phishing or malware distribution lure. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest it's designed to redirect users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://bahamianbrewery.com/ckfinder/userfiles/files/karikipik.pdf In PDF document text
    • https://satuldelut.ro/ckfinder/userfiles/files/94631906837.pdfIn PDF document text
    • https://editionsitaliques.com/userfiles/file/69841495454.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614260eadf297---90028230388.pdfIn PDF document text
    • https://divinenine.net/userfiles/file/lusugisisaponukakevevo.pdfIn PDF document text
    • https://www.lipca.com/ckfinder/userfiles/files/fuseraloluriruzi.pdfIn PDF document text
    • https://grancom.by/upload/docs/xivijovek.pdfIn PDF document text
    • https://cansandientu.net/Images_upload/files/kenawu.pdfIn PDF document text
    • http://sarkar.ie/userfiles/file/xiwixuxikuxepavixudemoko.pdfIn PDF document text
    • http://steffis-strassladen.de/userfiles/file/pexiti.pdfIn PDF document text
    • https://ildiko-szepsegszalon.hu/userfiles/file/delinivopisurevaxaga.pdfIn PDF document text
    • https://rinducm1.com/contents/files/soseraxowitinen.pdfIn PDF document text
    • http://distant-property.ru/fck_editor_files/files/rixesisubo.pdfIn PDF document text
    • https://groupunsur2.com/contents/files/vugabazowegebuk.pdfIn PDF document text
    • http://xn--80aaffebba2apgigwiiececnggk9e4k.xn--p1ai/pict/file/rogidexikewalularanoledo.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/52348822259.pdfIn PDF document text
    • https://grupa-energia.pl/attachments/file/5675863737.pdfIn PDF document text
    • https://ozsersogutma.com/upload/files/1148563428.pdfIn PDF document text
    • http://contrast.no/ckfinder/userfiles/files/15626729862.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16152069321a89---45768262731.pdfIn PDF document text
    • http://girc.ncue.edu.tw/ckfinder/ckfiles/files/81503529250.pdfIn PDF document text
    • http://canadianartistic.com/userfiles/file/rozoparavefolisigasimapir.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=best+ios+farming+gamesPDF 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_off0000b0c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0C0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c8d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8D2 17472 bytes
SHA-256: c3facaf6cd7d8280487fbbeea70783c12e844c9a5c2a1ca402fdfa958bdc455b
font_02_sfnt_off0000f5ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5BA 10564 bytes
SHA-256: 746afcf8c73b6efbfc8fd5aec28c4d4e2a591254cb92efc14b20f6017f26c14d

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