Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecc367cf26f857bf…

MALICIOUS

PDF

81.5 KB Created: 2021-09-14 04:55:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 0e93c19eae0df9e672d85c56b6e74ca9 SHA-1: 95f4b2cfbf0823a213a520300439f8175ed830e0 SHA-256: ecc367cf26f857bfcfeca8afe84247d97e31285aa83564d34813472702de0e23
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious documents that redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://helices-evra.com/userfiles/file/lixejaxusipi.pdf In PDF document text
    • http://www.fishandcosolicitors.com/uploads/files/gesogeborazapukabaf.pdfIn PDF document text
    • https://jungleflightchiangmai.jungle-flight.com/Uploads/files/11421901026.pdfIn PDF document text
    • http://symbioticlifetech.org/attfile/fckimg/file///20210913204414_904052685.pdfIn PDF document text
    • http://belstroyiz.ru/img/file/vojuzizijezejuvilenike.pdfIn PDF document text
    • https://pilot-nav.socksnbows.com/ckfinder/userfiles/files/kuzen.pdfIn PDF document text
    • https://ost-fogging.com/upload/files/vikudepizibunakezuzadu.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/5bfe9a0764c00776742c1ea3dc5b0815/10823647139.pdfIn PDF document text
    • http://geometrabottero.it/userfiles/files/20656585577.pdfIn PDF document text
    • http://www.logistiekverbeteren.nl/ckfinder/userfiles/files/67683168493.pdfIn PDF document text
    • http://22vek-omsk.ru/fck_editor_files/files/fikogowifu.pdfIn PDF document text
    • http://mmckno2010.zkosuchdol.info/files/94194956616.pdfIn PDF document text
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161356096111e7---53719089424.pdfIn PDF document text
    • https://bvphcn.bdata.vn/upload/files/vanojomururam.pdfIn PDF document text
    • http://merydian.pl/nowymerydian/userfiles/file/tumisiturejogijabo.pdfIn PDF document text
    • http://rutka.pl/media/upload/files/e65bfb5dc32cdf888ac9e054e5f1db26.pdfIn PDF document text
    • http://casier-a-bouteilles.fr/file/37078092411.pdfIn PDF document text
    • http://winecellarkeeper.com/ckfinder/userfiles/files/sesuzofafuletadejigakoxef.pdfIn PDF document text
    • https://redengewinnt.com/userfiles/file/xoririne.pdfIn PDF document text
    • http://preciz.com/uploads/wysiwyg/files/bogegegureluja.pdfIn PDF document text
    • http://hyundaihungthinh.com/uploads/images/files/50379431151.pdfIn PDF document text
    • https://samsungklimamodelleri.com/upload/ckfinder/files/90973985220.pdfIn PDF document text
    • https://www.displaysdirectaustralia.com.au/application/third_party/ckfinder/userfiles/files/wasanixowewixexozesuvafum.pdfIn PDF document text
    • https://www.akilciilacdernegi.com/ckfinder/userfiles/files/75988545220.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=picsart+apk+app+downloadPDF 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_off0000db8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB8E 10556 bytes
SHA-256: 70ebe2f5bbea3137102fef5f416bd334d1e0c3d4b624d450ac3c440da0156ca3
font_01_sfnt_off0000f3ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3CA 17240 bytes
SHA-256: f180861c5fbbf269e8e76a69254be4440196d3682de28625af6cc44ccc4ce301
font_02_sfnt_off00012035.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12035 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1