Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e6407c80fe9f01b…

MALICIOUS

PDF

71.7 KB Created: 2021-03-24 10:50:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 56e6775a810229c6b4cafcc191f05245 SHA-1: 6878b574903ac66ca3c9d713e18d92241b97710f SHA-256: 1e6407c80fe9f01b95a419c225c239041b65829faec92d9d2991bf1ad8ded266
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 0.9991

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://resalured.ru/strik?utm_term=taco+bell+chicken+chalupa+nutrition+value PDF link annotation
    • https://cdn.sqhk.co/lerapuraroke/ghiJKah/sisters_oregon_fire_map.pdfIn PDF document text
    • http://jekefidaz.mygamesonline.org/how_long_does_wonder_week_leap_10_last.pdfIn PDF document text
    • http://buxeletifexid.medianewsonline.com/22905262911.pdfIn PDF document text
    • http://smartcreditus.info/how_much_oil_does_a_new_lawn_mower_take5hfv1.pdfIn PDF document text
    • https://cdn.sqhk.co/desavusomo/kegi9rw/drift_clash_mod_apk_1._54.pdfIn PDF document text
    • http://bighome.space/42713939885aqv2e.pdfIn PDF document text
    • http://strongcreditscore.info/ajith_photos_wallpaperklri3.pdfIn PDF document text
    • https://cdn.sqhk.co/befozaxulot/uij60hd/1621098208.pdfIn PDF document text
    • http://gufutaca6.xyz/aashiyana_mera_female_song_mr_jatta6wjv.pdfIn PDF document text
    • http://keto-s1.com/lanifusulowunajinolajijotj6i5g.pdfIn PDF document text
    • http://masalev.ru/interoffice_communication_templatefawy7.pdfIn PDF document text
    • http://nubolutlion.xyz/tefonumwn2o.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://5a060084-92f5-4e09-b02e-bbac8bb45871.filesusr.com/ugd/05c943_f4c814b67e7d4f84a8cbb11d78b72b59.pdf?index=trueIn PDF document text
    • https://16564176-4c62-44d7-82e3-1dea6b832d73.filesusr.com/ugd/5e57cf_a774c811395d4ba6a2df97f954a7c947.pdf?index=trueIn PDF document text
    • http://wizigipixe.atwebpages.com/2007424851.pdfIn PDF document text
    • https://s3.amazonaws.com/wukevirenesu/cetusplay_apk_for_android_tv.pdfIn PDF document text
    • https://21319658-e817-4d6a-846f-872ccfe0f0c2.filesusr.com/ugd/982af2_113cd9f1c0154ef082d7c5e1ac304e08.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lotibabakuj/lebirazopolodomefa.pdfIn PDF document text
    • https://f85e9a30-dbb9-40fd-a66d-53bd7daafe07.filesusr.com/ugd/1b9faa_dbcbd5bd0e9f4b128ea154546270bc32.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mufukep/kejamode.pdfIn PDF document text
    • https://s3.amazonaws.com/rizezobabub/55603511923.pdfIn PDF document text
    • https://7fca5364-97a1-4441-b76e-d2c429a59218.filesusr.com/ugd/735424_3b01cdf3bd9b4211a797749d3084858e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zonebon/carers_allowance_self_employed_form.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF02 4940 bytes
SHA-256: 5486256a45945d9d19097ab306d28cd0dd672d6e65e759e5f71e18477357673e
font_01_sfnt_off0000dfba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFBA 10324 bytes
SHA-256: a94649c4485d3e3bed2db34ad5cb5aadc08cf74a5fba4af3dabe2b85a89fb26b
font_02_sfnt_off00010322.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10322 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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