Malicious PDF — malware analysis report

Static analysis result for SHA-256 1443df4c615b4a40…

MALICIOUS

PDF

67.8 KB Created: 2021-01-18 01:41:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: d2a45494d34cfcb4b50643be49859d63 SHA-1: feb08b66eba5e40d11157285f340549068bf997c SHA-256: 1443df4c615b4a40c060d599cdac3e3446289221972cc255687b03f3dc5f28b1
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. The document body, though partially corrupted, suggests a lure related to educational content, a common tactic for social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=distance+vs+displacement+worksheet+with+answers In PDF document text
    • https://puriruwuz.weebly.com/uploads/1/3/5/3/135395363/cff6e10e41b1.pdfIn PDF document text
    • https://xuposebifaperep.weebly.com/uploads/1/3/4/6/134673232/jivoralifoto.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476275/normal_5fa6e15bb8aad.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gekixadonuru/zebowalirowopatusoxipum.pdfIn PDF document text
    • http://xisapedugifado.epizy.com/gazozurir.pdfIn PDF document text
    • https://s3.amazonaws.com/waxegatulo/gijatama.pdfIn PDF document text
    • https://s3.amazonaws.com/sowewazulejewi/banagher_links_voice_actor.pdfIn PDF document text
    • https://s3.amazonaws.com/voxulija/report_phishing_que_es_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/veraxawewib/41572230365.pdfIn PDF document text
    • https://s3.amazonaws.com/zamuriza/algebra_math_questions_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/sasufufa/3609139219.pdfIn PDF document text
    • http://rajiwewovipu.epizy.com/company_of_heroes.pdfIn PDF document text
    • https://s3.amazonaws.com/gewuwasi/senelinora.pdfIn PDF document text
    • https://s3.amazonaws.com/feborobegibew/chrome_developer_tools_android_phone.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/canon_lide_120_scanner_driver_download.pdfIn PDF document text
    • http://kowotasube.epizy.com/apt_decoder_manual.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_off0000cbd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBD1 5528 bytes
SHA-256: 2d114088d1988854ecd8cbbe39e52b468a23f891ce20c4f029af080fad0f4e4e
font_01_sfnt_off0000de87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE87 10412 bytes
SHA-256: a5e6999826506af81e70f510d2a322230ba1cc7a3220b75c4dd103e49840a8a5

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