Malicious PDF — malware analysis report

Static analysis result for SHA-256 9071f1af13403a3e…

MALICIOUS

PDF

75.9 KB Created: 2021-10-09 10:44:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 6536dac3613c3d09e238f3e6c73e4458 SHA-1: 0420e00e7b859ccadcaa514b01845dc2978cd25c SHA-256: 9071f1af13403a3eada36e8fa282c34cd90be853112520fc3cb15f4646261dad
126 Risk Score

Malware Insights

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

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URLs, many of which are hosted on disposable domains, suggesting a link farm designed to redirect users to malicious sites. The presence of multiple external URIs and the ML classification strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://queure.ru/uplcv?utm_term=kim+clement+prophecy PDF link annotation
    • https://woft-dining.com/webroot/editor-uploads/files/89658820163.pdfIn PDF document text
    • http://ejmk.com/ej/upload/files/sanusamesutawuvulisu.pdfIn PDF document text
    • http://globalcenterhotels.com/bot/ckfinder/uf/files/migajalokinefirupiz.pdfIn PDF document text
    • http://mrs-edu.com/sribati/editor/uploadfiles/goxodotetuzafezi.pdfIn PDF document text
    • http://vibestedu.com/_UploadFile/Images/file/53681825906.pdfIn PDF document text
    • https://collinite.pl/userfiles/file/giligiro.pdfIn PDF document text
    • http://soft-pro.hr/upload/datoteke/nidemexilerodaxo.pdfIn PDF document text
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1614e62e01908c---67277636042.pdfIn PDF document text
    • https://lifo-sea.com/ckfinder/userfiles/files/rasizox.pdfIn PDF document text
    • http://radyoislam.com/resimler/files/medadetawiromoxi.pdfIn PDF document text
    • http://birzebbugastpetersfc.com/files/file/mapefomigoxukorusike.pdfIn PDF document text
    • http://gcsiva.com/files/userfiles/file/45045143993.pdfIn PDF document text
    • http://tatugigo.com/ckfinder/userfiles/files/5076873063.pdfIn PDF document text
    • http://westernmaki.com/uploads/files/424918610.pdfIn PDF document text
    • http://hodinovysoused.cz/upload/file/71173759371.pdfIn PDF document text
    • http://edituj.cz/res/file/82132571924.pdfIn PDF document text
    • http://www.ambatownship.com/ckfinder/userfiles/files/30443570783.pdfIn PDF document text
    • http://www.johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/8012042536.pdfIn PDF document text
    • http://faceconnects.com/ci/userfiles/files/tezev.pdfIn PDF document text
    • http://sherwoodonionfestival.com/ckfinder/userfiles/files/61399425713.pdfIn PDF document text
    • http://phutungotodungha.com/img/files/resipoxewapexofawer.pdfIn PDF document text
    • https://matricula.netlandschool.cl/files/punigume.pdfIn PDF document text
    • http://letsbelegal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vemuzupolojarotenebituroj.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/1613260a4d170e---94919424189.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_off0000c5a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5A7 10412 bytes
SHA-256: 377f4bca6a42ab5a69dc5f2ea89e6b3a4bcbfddc7d7c388c263c7ca6cf45e133
font_01_sfnt_off0000dcfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCFA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f50c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF50C 17464 bytes
SHA-256: 20bc8eb5597e9857253d861c6c91203ff9335471278f6d51c4055cd5179bc7a5