Malicious PDF — malware analysis report

Static analysis result for SHA-256 61eb2adff6bdcad0…

MALICIOUS

PDF

80.2 KB Created: 2021-04-06 22:54:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: c9c1d5b42a8089d2eadc0930218ad5eb SHA-1: edcc82f14ce7d3b31cbf3d8f071b331af6a750c2 SHA-256: 61eb2adff6bdcad02bd74070ea1c8e2342fd33d71486363499ab30f1051a05bc
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 0.9957

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
  • 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/wix?keyword=hip+hop+planet+questions+for+discussion+answers PDF link annotation
    • http://wiwovurezibaso.getenjoyment.net/dadelalomimizujedi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426062/normal_6056f159d1518.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497658/normal_5fcc00c5d7ee5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482869/normal_5ff5238ca05b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367290/normal_606b1ba60480d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494146/normal_5fc581039c327.pdfIn PDF document text
    • http://geforiro.scienceontheweb.net/panzerblitz_counters.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451044/normal_602787a8bb463.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443602/normal_5fd611c781273.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470980/normal_5fee685c2d709.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454300/normal_600aee4e50b73.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414169/normal_6002611b50869.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ab2dee1-1f05-4560-aaad-f49e084a0d78/dune_buggy_wiring_schematic.pdfIn PDF document text
    • https://6525eaf8-9a42-4119-9fb4-c3d475b3b78e.filesusr.com/ugd/80bfa9_e4dd7e3050da47d08e086c96d4743a45.pdf?index=trueIn PDF document text
    • http://wokidomogu.onlinewebshop.net/estrategias_de_comprension_lectora_sm.pdfIn PDF document text
    • https://s3.amazonaws.com/vonutavekip/a_raisin_in_the_sun_act_1_zusammenfassung_deutsch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87b13a48-2f6c-42cf-872c-66b9feeb6ce3/mobuxexugajatuto.pdfIn PDF document text
    • https://e25b7b56-d8f7-44cb-9276-56428e53d1cc.filesusr.com/ugd/63f3e8_7002da02d8584382a53b69ae75527813.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d7b9c7d-275c-4fbe-acef-c434d174b937/how_to_unlock_lg_tracfone_without_password.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c086271c-e9d7-44e2-bd78-8b0481560e26/38661928019.pdfIn PDF document text
    • https://s3.amazonaws.com/sizabo/77268599538.pdfIn PDF document text
    • https://s3.amazonaws.com/timeziso/detajezagubabavupapa.pdfIn PDF document text
    • https://1a2149e7-ca7f-4e7c-a584-0e483de6f3af.filesusr.com/ugd/9219f8_6d255d5289344c36903b4126928db168.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/banula/15998024122.pdfIn PDF document text
    • https://s3.amazonaws.com/satulibaren/mugapazazemopevi.pdfIn PDF document text
    • https://8d5bcf17-53f2-4f21-b585-7a27aef14131.filesusr.com/ugd/7baf93_3d9c3c58b06845f185a478128d164940.pdf?index=trueIn PDF document text
    • https://1b65b899-5fad-42bd-af9e-a3fb1d6a4c80.filesusr.com/ugd/a2ebd8_26ce55cbf8c14c2ca610eacefe376ae2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb0397cd-fe91-4947-a31d-7adc107663a6/can_blood_type_a_eat_popcorn.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_off0000f926.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF926 5420 bytes
SHA-256: d0258a2e249c60e28635b707c5008d5e9bc3161bc5e5733b9062dcec620142ce
font_01_sfnt_off00010ba1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BA1 11420 bytes
SHA-256: 546d9e27d816533b176f1ca13079db14c9a39195ffe098033e3c5d79fa104ae3