Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fbd90e0b6d757c7…

MALICIOUS

PDF

85.1 KB Created: 2021-03-23 03:09:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: dfbc520be10779d72a39ad39d109dcb7 SHA-1: 5053a0f67982aa48146e55ff2979fb72055b16f6 SHA-256: 9fbd90e0b6d757c77e9836edd3e17761bd7c981362e1c855789ff44bbe62fab9
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9994

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 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://botokaw.ru/strik?utm_term=chapter+1+test+geometry+answers+form+g PDF link annotation
    • http://zijixiteluwek.scienceontheweb.net/85606854843.pdfIn PDF document text
    • http://zapitexidij.mypressonline.com/calendario_mundial_rusia_2020_argentina.pdfIn PDF document text
    • http://lofajemami.sportsontheweb.net/24593071720.pdfIn PDF document text
    • http://joritirumag.mypressonline.com/kelumowifavesusejopepiki.pdfIn PDF document text
    • http://fajujefa.getenjoyment.net/zixerufewef.pdfIn PDF document text
    • http://tujidal.mypressonline.com/fire_and_ice_by_robert_frost_analysis.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://2c0370cf-43ec-4dc9-8589-ec1e7793a70d.filesusr.com/ugd/404058_e0762794000f49d2bf1e26222238dd8e.pdf?index=trueIn PDF document text
    • http://xekabotiwuker.atwebpages.com/2w10_bridge_rectifier.pdfIn PDF document text
    • http://rijonitapadon.myartsonline.com/application_of_bendable_concrete.pdfIn PDF document text
    • https://s3.amazonaws.com/nokiva/how_to_remove_ink_absorber_full_in_brother_dcp-j125.pdfIn PDF document text
    • https://a80c0318-1640-4d50-a016-df037fc402b9.filesusr.com/ugd/895bef_d25523d2da05437e8aab80a55fe22ce1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zonebon/75709436525.pdfIn PDF document text
    • http://gozidonozali.myartsonline.com/17th_amendment_of_bangladesh_constitution.pdfIn PDF document text
    • http://zukomakiduw.myartsonline.com/sisifi.pdfIn PDF document text
    • http://tapoloferazuziw.atwebpages.com/39656262357.pdfIn PDF document text
    • https://510b81f6-be4e-4e40-9acf-3f60af495837.filesusr.com/ugd/5f226b_0e8b1b4c0b494b86b036aaf37cc59f97.pdf?index=trueIn PDF document text
    • http://pevogikuxupeja.onlinewebshop.net/badger_insinkerator_500_1_2_hp.pdfIn PDF document text
    • https://203aa715-7352-46b1-b16b-5d0aeeaa27a2.filesusr.com/ugd/0582e0_70efac561a2b449db9b8a72e7eceb144.pdf?index=trueIn PDF document text
    • https://e1eccfe9-8888-4f52-a155-e9c8e84e0752.filesusr.com/ugd/4fb05f_82f3465159d847f7927eb4221f0afefc.pdf?index=trueIn PDF document text
    • https://2ffa788b-df2f-461f-b9c5-573bec542745.filesusr.com/ugd/374ce0_a206b74145284fd9846ba9c44eb6f515.pdf?index=trueIn PDF document text
    • https://30de3caf-c510-4ce9-8691-b8280dc60d9b.filesusr.com/ugd/4980ee_1b45a824abc74828bdeeb9aed3325445.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xaliwalufoguni/vogorivadawi.pdfIn PDF document text
    • http://lojubefogugiku.onlinewebshop.net/13682206785.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_off00010a63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A63 5436 bytes
SHA-256: 7b7902a7817364b5443740a546d7abe0d4a052ca8cea0142ba2b496fafa87315
font_01_sfnt_off00011cd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CD0 11876 bytes
SHA-256: 6c8fd8ab10376c27939d9218a302c1ec27dc23cb5444b9a6f56777ce1c93b0fe

Open this report in the interactive analyzer, or submit your own file for analysis.