Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9ec437296f4881b…

MALICIOUS

PDF

80.3 KB Created: 2021-09-19 02:43:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 9ff59e85daed22c0ef3a0a6d204b2a53 SHA-1: 52ab1cab15ec75e0a8a2823244ad245257f0a7b8 SHA-256: c9ec437296f4881b3c3be53bcf6ed9145e65f7d6ad8e7f768236ec29d0f3372f
154 Risk Score

Malware Insights

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

This PDF file contains embedded JavaScript and multiple external URIs, some pointing to raw IP addresses, indicating an attempt to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The document's structure as a link farm on disposable hosting further supports a malicious purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://elitsatodorova.com/uploadfiles/file/weziradolifenivivosavi.pdf In PDF document text
    • https://literie-depot.fr/UserFiles/file/91491878254.pdfIn PDF document text
    • http://maquinandoysubastando.com/dleyes/admin/fotos/file/podukelimod.pdfIn PDF document text
    • https://registracijakoncar.com/webroot/js/ckfinder/userfiles/files/14227389116.pdfIn PDF document text
    • https://wct.goldcrownresort.com/magazine_files/files/zogiwotus.pdfIn PDF document text
    • http://eastendmediation.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/gojonogavegut.pdfIn PDF document text
    • http://bongoes62.dk/userfiles/file/5472379353.pdfIn PDF document text
    • https://sunsoftinfoway.net/ckfinder/userfiles/files/binatekawudi.pdfIn PDF document text
    • http://hurtmar.pl/Upload/file/44055995744.pdfIn PDF document text
    • https://terracell.info/images/file/9976337303.pdfIn PDF document text
    • http://www.companyforte.com/imagenes/editor/file/rumanalilikixukubenesuf.pdfIn PDF document text
    • http://logicamail.it/draft/media/wulew.pdfIn PDF document text
    • https://ever.dacola.com/upload/files/wopinamabativenalakudefuk.pdfIn PDF document text
    • http://miraesusan.com/ckupload/files/92574338530.pdfIn PDF document text
    • http://cps-mbstu.edu.bd/app/webroot/js/ckfinder/userfiles/files/7852727031.pdfIn PDF document text
    • https://unique-u.biz/images/uploads/file/96801081478.pdfIn PDF document text
    • http://dom-2000.ru/ckfinder/userfiles/files/71491186532.pdfIn PDF document text
    • http://cinebuzz.be/uploads/userfiles/files/46184343506.pdfIn PDF document text
    • http://fiorenzuolatrack.it/userfiles/files/89490544760.pdfIn PDF document text
    • http://sasnowosielski.com/ckfinder/userfiles/files/febijowavis.pdfIn PDF document text
    • http://tygodnikzuzlowy.pl/ckfinder/userfiles/files/48223546952.pdfIn PDF document text
    • https://alpasol.e-giant.net/upload/files/nisizajowapowe.pdfIn PDF document text
    • https://www.iieng.org/editor/ckfinder/userfiles/files/45495046337.pdfIn PDF document text
    • https://faresaldabbous.com/uploads/files/fapibafu.pdfIn PDF document text
    • http://htbestcomputer.com/media/ftp/file/88959527802.pdfIn PDF document text
    • http://185.33.116.145/~acus01/upload/files/95911864487.pdfPDF link annotation
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=car+games+with+gear+in+manual+onlinePDF 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_off0000d4e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4E4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ecf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECF6 17440 bytes
SHA-256: 59f262bb082ee726f8a34e62d84a568638a40bd635e4124a5feadb9205e6b371
font_02_sfnt_off00011a51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A51 10772 bytes
SHA-256: e68a4a9fc5fe4bb29aac4ed280a1300649c7c2f754072e7f5c61e5fd16ced8fc