Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b765f0bcf05e600…

MALICIOUS

PDF

79.8 KB Created: 2021-09-09 14:24:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 972b2e09dac572b942e893eb822f1ceb SHA-1: ad8d2a70ffafa0492a120372c028a5e1c02572bd SHA-256: 1b765f0bcf05e60047d56b79b952984089bf6934ffda552c2a53c9768d233478
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document contains numerous links to potentially disposable domains, suggesting a tactic to obscure malicious destinations. While no scripts were extracted, the presence of many unknown URLs points towards a phishing or malware distribution attempt.

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://www.herbertvanderbrugghen.nl/draft/fotosutidasimatuni.pdf In PDF document text
    • http://myatkinsonfamily.com/userimages/33782045283.pdfIn PDF document text
    • http://huonglonghotel.com/uploads/image/files/dadevimikeragimudebufug.pdfIn PDF document text
    • http://easyhypermarket.com/userfiles/file/5255209703.pdfIn PDF document text
    • http://dolonchem.com/upload/files/25213562855.pdfIn PDF document text
    • http://nhactheducthammy.com/upload/files/gagelifaxuwibalojegi.pdfIn PDF document text
    • http://zhuoer.ltd/userfiles/file/kokamov.pdfIn PDF document text
    • http://jingmingtai.com/filespath/files/20210906185920.pdfIn PDF document text
    • http://takramaipai.com/mypicture/file/zetidevisudipufote.pdfIn PDF document text
    • http://doradcyprawni.com/images/pliki/wuvebonugiga.pdfIn PDF document text
    • http://www.pes.edu.mn/ckfinder/userfiles/files/60063868765.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133379b1a9fa---89472115922.pdfIn PDF document text
    • http://etenindex.nl/images/uploads/57468951407.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/161313ce629d24---mudisewuguvewubemisiw.pdfIn PDF document text
    • https://jmcoverseaspvtltd.com/uploads/files/77270335425.pdfIn PDF document text
    • https://mudraconsultancy.com/uploads/files/27530446940.pdfIn PDF document text
    • http://cukiernia.eu/upload/files/17554314980.pdfIn PDF document text
    • http://www.como-grup.ro/fisiere/file/wugilesizixogivonabid.pdfIn PDF document text
    • http://rlmlaw.com/images/edit_images/file/zezuwi.pdfIn PDF document text
    • http://cs-web-design.de/ablage/userfiles/files/puwebojusetojufebufati.pdfIn PDF document text
    • http://icr34.fr/icr/icr34.fr/www/files/files/40278068281.pdfIn PDF document text
    • http://skazka76.ru/pic/userfile/58441932730.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=project+to+tv+androidPDF 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_off0000d61d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD61D 16992 bytes
SHA-256: 6b02cde10d6e566d2ea55421777fe2c9183889e4ddbbcc2ba2757c8263c9406a
font_01_sfnt_off00010219.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10219 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011a30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A30 10348 bytes
SHA-256: 53c04a4aa873d9515eaa8895cb4e70adf238847cca2c47d852044e3b5e721812

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