Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e4513a1293f5147…

MALICIOUS

PDF

58.2 KB Created: 2020-12-16 08:54:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 6932516212d7d832ba5d450f7ef5943b SHA-1: 1d8aa4aedc4e29dc3fc482d9a95bf424c4619ac3 SHA-256: 6e4513a1293f51477aba12abd14ad0b44d7be197633e82e01538af50c22d795a
214 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a significant number of embedded URLs, with one identified as a known malicious redirector. The presence of a large link farm suggests an attempt to manipulate search engine results or distribute malicious content through seemingly legitimate documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffking.ru/123?utm_term=sacramento+animal+control+front+street In PDF document text
    • https://ganulexotugoris.weebly.com/uploads/1/3/1/1/131164012/9198ced65a71e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421613/normal_5f97feb96a8bd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc681f46609fd0ee7b82cec/t/5fce76f944ea9f5ccff23180/1607366395267/zombie_hunter_sniper_shooting_survival_games_download.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc398a91c8c74131442ee00/t/5fca3bb941142a3c4b49bdae/1607089083191/gutupez.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc30eb611f6a4198493c815/t/5fc53b6a18e72e5fdb826c38/1606761323868/honda_civic_user_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d203249e-ed60-4159-8a07-2c497bfa924a/3046793763.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc12a0327a199023ab7046e/t/5fc75a983ac9c763f4d6575f/1606900380637/xiwezivadosejugif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d506fc64-c306-44d8-9ffb-e2deb4b64524/8635897071.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc59da3bf71053ccb2fc112/t/5fd165fec10336458b2a1fff/1607558655213/85356708655.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5088aa5bc066edfc02720/t/5fd6538872b1137fa973ccfa/1607881609368/bejiwigebijejikilexadexop.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a9b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA9B8 5128 bytes
SHA-256: 9381789818b6818a4cdfd2bf670b9f4522a1fd08adc2240f3a92ad25eed0430a
font_01_sfnt_off0000bb12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB12 9896 bytes
SHA-256: 2ccd8072450559e64e11bf72deb49e57d06d2231e1a75d877dc08e4af7833b2f

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