Malicious PDF — malware analysis report

Static analysis result for SHA-256 5368dc0db037697e…

MALICIOUS

PDF

80.3 KB Created: 2021-09-16 00:05:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: e057325b9e51d42e5736371e3226a7c0 SHA-1: 807050c2b4e80ee1e1d1479fe0767747ce268fa9 SHA-256: 5368dc0db037697e558d0fc9e349e9f324f0c2076d7fe72fbf05ed1a32c608fb
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, presents a deceptive download button and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://togelunited4d.com/contents/files/4366234602.pdf In PDF document text
    • http://akademia-jedenastka.pl/zdjecia/fck/file/nasagerifox.pdfIn PDF document text
    • https://rmp-traueranzeigen.de/cms/files/datowalejiromabisum.pdfIn PDF document text
    • http://newdimension.su/userfiles/file/88893423679.pdfIn PDF document text
    • http://peneleos.pl/userfiles/file/73997322379.pdfIn PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/2ec2e13313b1ad2e023c808d26f26257/41977248228.pdfIn PDF document text
    • http://harposwebdesign.nl/app/webroot/files/userfiles/files/jixasa.pdfIn PDF document text
    • http://smart.sut.ac.th/tsme/src/lib/ckfinder/userfiles/files/22572456784.pdfIn PDF document text
    • http://langmoon.jp/js/upload/files/wajivujalado.pdfIn PDF document text
    • https://agermag.ro/mm/file/linekonada.pdfIn PDF document text
    • http://detskypohar.cz/upload/file/bifawapefepuruwadebofel.pdfIn PDF document text
    • https://menu2uplus.com/images/file/rekadafokuvuj.pdfIn PDF document text
    • https://cribpointonline.org/cribpointonline/userimages/file/88680402723.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/161425f1aecff7---duvapiwarunimoruxur.pdfIn PDF document text
    • http://qamsar.org/userfiles/files/xerivaselefilugix.pdfIn PDF document text
    • https://tagoproperties.com/ckfinder/userfiles/files/97225860530.pdfIn PDF document text
    • https://egc.ecrom.work/syo/files/80141754315.pdfIn PDF document text
    • https://vinatech.com/userfiles/file/vubugorokavadodukeweliz.pdfIn PDF document text
    • https://www.emcp-pmce.ca/_includes/ckfinder/userfiles/files/xuwesopelazibaxu.pdfIn PDF document text
    • https://firesystem.ro/imagini_ws/3462808663.pdfIn PDF document text
    • http://wedooverseas.com/userfiles/file/7228801574.pdfIn PDF document text
    • http://perfekt-dom.pl/designhome/admin/userfiles/file/28276614084.pdfIn PDF document text
    • https://tezerwatch.com/file/upload/files/09-10-09-56-36-51.pdfIn PDF document text
    • http://tks-forever.com/upload/2021/09/04/file/viwexikiganon.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=botim+app+apkPDF 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_off0000d5cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5CF 18504 bytes
SHA-256: a5b4b1fe1c9e523fd02ab4eed80821b28b42ee0833fb09bd5b6b1dfee6e1a74f
font_01_sfnt_off000105c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105C0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011dd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DD7 10008 bytes
SHA-256: 12a0ed1a390122e0d605dec44de711aa97eea4f436427f09863036040e6b8eba