Malicious PDF — malware analysis report

Static analysis result for SHA-256 66dae5caa4c1ea7e…

MALICIOUS

PDF

79.1 KB Created: 2021-03-13 15:06:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 2426d420d658ff0b70851686e1576f14 SHA-1: a97e4b3a658a51d714f530c4da49a4e8d1f31690 SHA-256: 66dae5caa4c1ea7e28cd7bd485ad1a1823a9427bb1805b35d4e441005b74eadc
126 Risk Score

Malware Insights

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

The PDF document contains multiple external URIs, with one specifically linked to a 'free living will template tennessee' lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. Although no scripts were directly extracted, the presence of numerous URLs and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggest an attempt to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://druttle.ru/123?utm_term=free+living+will+template+tennessee PDF link annotation
    • http://gladkoe-telo.xyz/79070893353q5dri.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453329/normal_6046fcb6f1b30.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421934/normal_5fd7fa196e5cd.pdfIn PDF document text
    • http://paxejunon.mygamesonline.org/zepafufatidowumokedife.pdfIn PDF document text
    • http://mizejodaf.mywebcommunity.org/watch_twilight_online_download.pdfIn PDF document text
    • http://help-bluebadgecustomer.com/tujofeloroxuwydotm.pdfIn PDF document text
    • http://national-verifyteam.com/zutawevugiwomujibamknft.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404310/normal_5fd99fc1b7ba2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457570/normal_60304d3ee9f56.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368250/normal_6007c392bb9f1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bufijonewufo.onlinewebshop.net/heroes_of_olympus_movie_release_date.pdfIn PDF document text
    • https://s3.amazonaws.com/zubata/hm_revenue_authorising_your_agent_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10c41705-3fff-4950-9261-9800926abf04/pandora_featured_track.pdfIn PDF document text
    • https://780c8f77-0f51-49ab-8dd1-60a90eb210a4.filesusr.com/ugd/1b8612_539dfc81a6564e7aac063661fb4e14a9.pdf?index=trueIn PDF document text
    • https://f18b8dc1-3ce9-44bd-8712-01435d039869.filesusr.com/ugd/b97cba_09b95afa21a94a35be2f5efa6ce23ce3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xidulumexi/kuvelekifubakakuwivup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f186a4d-6665-4ccf-9a9c-1275812b490b/how_can_you_heal_your_heart.pdfIn PDF document text
    • http://muluwokixo.onlinewebshop.net/can_ryuk_die.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28b2a446-fd5f-4cf1-8417-b1033529c488/jolosinukibipiduwapo.pdfIn PDF document text
    • https://0a3c8164-ddd9-4522-8472-457ce31ece15.filesusr.com/ugd/d32f78_7c90105e53d6417eb967bf372209c342.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dukavunivifa/eurosport_australia_tv_guide.pdfIn PDF document text
    • http://namakanexir.atwebpages.com/petroleum_production_systems_2nd_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/votuweroxigezog/blackmagic_4k_extreme_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cbcd181-c1de-4a65-b8c0-685caad73449/core_phoneme_segmentation_test.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_off0000f82a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF82A 5244 bytes
SHA-256: f0f78d13bd4dcadbdb76ce3be544ed692005dc0c44261bca4ccd5df1a23b29ac
font_01_sfnt_off00010a03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A03 10820 bytes
SHA-256: 04d950bdbb9941c96f5ce0b86a936aa94f7898c1e98fa28728e710caedcba0ed