Malicious PDF — malware analysis report

Static analysis result for SHA-256 67239af7bd316ce2…

MALICIOUS

PDF

77.8 KB Created: 2021-03-17 17:01:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9b8707839eee9448ee5ba5c9779f96cd SHA-1: 10e5fb10a9241b60e7d588744f505aed6e7e34f4 SHA-256: 67239af7bd316ce29b986659676729b910c8ce982c9bd76a1a719d457b77b6b5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://gimoguvi.ru/strik?utm_term=what+is+soft+17+in+blackjack PDF link annotation
    • https://sumejuloluguwir.weebly.com/uploads/1/3/5/3/135390827/bopapubaresapol.pdfIn PDF document text
    • http://vopukisavenif.medianewsonline.com/dafolewowofoketi.pdfIn PDF document text
    • https://vodexekuteb.weebly.com/uploads/1/3/0/7/130776001/ca6f03.pdfIn PDF document text
    • https://wisapemewe.weebly.com/uploads/1/3/4/7/134713478/9477632.pdfIn PDF document text
    • http://vekogevev.22web.org/solving_quadratic_equation_worksheet.pdfIn PDF document text
    • http://jiwapadenejeza.getenjoyment.net/64821920626.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xilekur.epizy.com/zajojoni.pdfIn PDF document text
    • https://0cfe495c-9a5f-46a1-a5f3-fb21b6211bac.filesusr.com/ugd/7aabb2_3d064b701cb049869314930e8ddba422.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tezude/weights_and_measures_act_1985.pdfIn PDF document text
    • https://s3.amazonaws.com/sazariwapa/apache_tomcat_8_for_eclipse.pdfIn PDF document text
    • https://ccd4a2e6-63e2-4dcb-a02e-1ae1253dabcc.filesusr.com/ugd/059ff1_51d71a9ceb7b4049a178fd4f2a438456.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xupimaral/must_watch_hbo_series_2020.pdfIn PDF document text
    • http://bonanelokuweje.rf.gd/sky_sports_tv_guide_today.pdfIn PDF document text
    • http://wozurusezop.rf.gd/vugodoji.pdfIn PDF document text
    • http://tepominofujemo.atwebpages.com/15866078049.pdfIn PDF document text
    • https://5e3b32e6-a537-4a58-a531-ef303a468713.filesusr.com/ugd/120874_8147107ea8094c129dd68768eb855927.pdf?index=trueIn PDF document text
    • https://29159626-56e2-4eb2-a8c1-eb081f451e44.filesusr.com/ugd/a58502_0120d6cbe14d465fa2740c877dd8dd7c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nonabafat/11_22_63_trailer_espaol.pdfIn PDF document text
    • https://d45380bd-a93d-4ef2-b2bd-4c7806d1f6db.filesusr.com/ugd/5d2cf3_5dc7b572a87a4b45ad10e3be77c1538d.pdf?index=trueIn PDF document text
    • https://c183b790-cb34-49aa-848e-1a9f2b14dda3.filesusr.com/ugd/d8966e_26d3459069f045748cb603c57008955c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pukaridimupo/tumuponufifukolugixunade.pdfIn PDF document text
    • https://8a833fea-7c9a-4d2e-a5a7-d3590f42a3e5.filesusr.com/ugd/9aab09_1a7c661b800842c99bc6f5bec0b5f4a3.pdf?index=trueIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD7 5296 bytes
SHA-256: 2d0506d9c1015432de479fb91e5b0e14aa9cf777614fec1a4457eb1119e2fba4
font_01_sfnt_off00010205.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10205 11204 bytes
SHA-256: e8b5ec1eb1739e3f04a6b2e98460ac820bf32bd6baeb67dad36e0074415f3680

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