Malicious PDF — malware analysis report

Static analysis result for SHA-256 2feb206743ef825d…

MALICIOUS

PDF

109.6 KB Created: 2021-03-13 20:44:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: c5bd5d54da0b514c0638ce8bb4b2dfb1 SHA-1: 13939d47e1242a7c1447a1278e4ac3269f954823 SHA-256: 2feb206743ef825d45cf9532a7e41dbbfe7997159e4ccdd89c260c3742b62f9f
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable domains, indicating a link farm or SEO manipulation tactic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to distribute further malware or phishing content. The presence of numerous external links, some on disposable hosting, points towards a strategy of redirecting users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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.
  • 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://dugedepap.ru/award?keyword=edgar+allan+poe+el+cuervo+y+otros+poemas+pdf PDF link annotation
    • https://cdn.sqhk.co/zoxowowi/jdljijg/water_park_slide_race_game.pdfIn PDF document text
    • https://pivisagut.weebly.com/uploads/1/3/2/8/132815367/1773348.pdfIn PDF document text
    • https://cdn.sqhk.co/denepepunuja/fjiwUiv/kizalutonaxofip.pdfIn PDF document text
    • http://uscreditcheck.info/the_potato_hack_resultslusdv.pdfIn PDF document text
    • http://padojuputiki.iblogger.org/ritabi.pdfIn PDF document text
    • http://wazepewazivulil.mywebcommunity.org/hp_photosmart_c5280_all-in-one_printer_price.pdfIn PDF document text
    • https://zaxixeresez.weebly.com/uploads/1/3/1/8/131871416/newowelipakigo_wogazodedovaze_fedisolo_tenorawima.pdfIn PDF document text
    • http://dixivurozepesu.iblogger.org/56076841527.pdfIn PDF document text
    • https://nojonepidafajik.weebly.com/uploads/1/3/0/7/130775859/7734255.pdfIn PDF document text
    • https://cdn.sqhk.co/safubuguva/YzQghic/best_movie_streaming_apps_for_android_tv_box.pdfIn PDF document text
    • http://subbellassecret.com/bupemabowalikofifivizdhhx4.pdfIn PDF document text
    • https://cdn.sqhk.co/kagurase/djdOghc/tubimupepoka.pdfIn PDF document text
    • https://bojufare.weebly.com/uploads/1/3/1/0/131070992/1713937.pdfIn PDF document text
    • https://cdn.sqhk.co/kitujesijak/Jhfjj0Z/download_game_weekend_warriors_mma_mod_apk.pdfIn PDF document text
    • https://gopaposoxawa.weebly.com/uploads/1/3/0/7/130740193/kepowedanisuj.pdfIn PDF document text
    • https://cdn.sqhk.co/waganozusi/tfMhiYr/nunewefiderozomajevorar.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wazeniwemir.onlinewebshop.net/569582026.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_off000168b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x168B2 5596 bytes
SHA-256: ca53b10625e28cbd6d0bb147d84e73d056aec0e51118aa970693390b1590a58d
font_01_sfnt_off00017bbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17BBD 13364 bytes
SHA-256: efa30c0a2d20f8836c45d7529c69364dccfc98157d2b740c675613c2c4605976

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