Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d1568066f019abd…

MALICIOUS

PDF

80.0 KB Created: 2021-09-21 09:00:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 58fd9faf994d83b4d557f8db3f5ce46c SHA-1: 4d1e5ab8cc29e28e3dcc9596eebb3d31a537f836 SHA-256: 3d1568066f019abd722513fc78aac87d28c924a59f5d4aa08ee0d24144e51865
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and numerous external URIs, many of which point to disposable domains. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a link farm on disposable hosting, and ClamAV detection as Pdf.Phishing.Trojan suggests a phishing or trojanized document. The embedded JavaScript likely facilitates the redirection to these malicious URLs, aiming to trick users into downloading further payloads or providing credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 6

  • 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.
  • 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://coretry.ru/uplcv?utm_term=goat+sim+payday+apk PDF link annotation
    • https://flavio-tonon.it/public/file/65198733624.pdfIn PDF document text
    • https://doucetplasticsurgery.com/ckfinder/userfiles/files/gaxisigobugowufapulofek.pdfIn PDF document text
    • http://xn----7sbabaajmdfbk3ddf3azka3b6a2r.xn--p1ai/ckfinder/userfiles/files/xovemirijug.pdfIn PDF document text
    • http://ufcnagykanizsa.hu/userfiles/file/91988049181.pdfIn PDF document text
    • http://fleshlight-tw.com/userfiles/file/vaxoboxobutulebido.pdfIn PDF document text
    • http://www.travelwithtaangoo.com/img/file/tasekuzesumefejazubudojaz.pdfIn PDF document text
    • http://www.radeton-cz.vasestranky.cz/ckfinder/userfiles/files/meranifuwotowi.pdfIn PDF document text
    • http://zap-interactive.com/uploads/files/batubupivelowiwaxa.pdfIn PDF document text
    • http://ausafe.net/images/art/files/6226468420.pdfIn PDF document text
    • http://nutrizionisti.eu/public/thread/risorse/file/63617808622.pdfIn PDF document text
    • https://grupo-bahia-real-estate.com/ckfinder/userfiles/files/55594363893.pdfIn PDF document text
    • http://lnimeina.it/userfiles/files/23908605334.pdfIn PDF document text
    • https://eetravel.net/file/morepobovu.pdfIn PDF document text
    • https://hotelite.in/userfiles/file/kefumileveposiremitopano.pdfIn PDF document text
    • https://angkaganjil.com/contents/files/77327794024.pdfIn PDF document text
    • http://carscaso.com/js/upload/files/80793755381.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/6f5f8980d007aaa617cbc04450b3847c/53323719417.pdfIn PDF document text
    • https://mobilaide.com/upload/editor/file/jitapumiruj.pdfIn PDF document text
    • http://nemeckystrakac.sk/editor_uploads/files/23115907880.pdfIn PDF document text
    • http://mgbig.com/upload_fck/file/2021-9-12/20210912212827708853.pdfIn PDF document text
    • http://abwnickersonplaza.com/uploads/files/20275981483.pdfIn PDF document text
    • http://stainless-faucet.com/uploads/htmlupload/files/xasugigunitit.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_off0000d610.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD610 10416 bytes
SHA-256: d4db915967385e280d77b24e9947e708826f7c8b33cad1b8e485cd062b5d4076
font_01_sfnt_off0000edbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDBD 17200 bytes
SHA-256: b18586360757edb5b87a6969e9ad7e90615cd254a00f58f0b939ec4e5180880d
font_02_sfnt_off00011a2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A2E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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