Malicious PDF — malware analysis report

Static analysis result for SHA-256 683d08bd32335962…

MALICIOUS

PDF

84.1 KB Created: 2021-03-27 14:51:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: fa93c7e0cf5989b2bd2939fad55235b2 SHA-1: c096dee7087cef18c270385ed1401b7faad22b68 SHA-256: 683d08bd323359624ae26b54a02b322e3a943a1f0b2fe5729ca86cd7016716ed
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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-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://gimoguvi.ru/wix?keyword=madeline+hunter+lesson+plan PDF link annotation
    • http://salonapp.xyz/dosenumupowewedegojakg6ux3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365582/normal_603e2d706b042.pdfIn PDF document text
    • http://stikc.xyz/65434840405zgbnv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412768/normal_5ff769b84a0ec.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372963/normal_5ff5716c19e46.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415518/normal_603c733a938d3.pdfIn PDF document text
    • http://biggymstoe.com/rixatujixanaxagdqbp.pdfIn PDF document text
    • http://lavkavkusa.store/taduwumuxavitegqwru.pdfIn PDF document text
    • http://firstflirts.site/bupevadfo4n.pdfIn PDF document text
    • http://dimax-matrasy.ru/69052601541rulbv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369919/normal_600753395490a.pdfIn PDF document text
    • http://kernig.store/acronis_backup_recovery_11._5_management_console4comk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421966/normal_600c1cab2b345.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465709/normal_605d82498fe3a.pdfIn PDF document text
    • http://bestsalestoday.xyz/bajirao_mastani_full_movie_with_english_subtitles_fmoviesi0jeo.pdfIn PDF document text
    • http://rocketdocs.us/family_ties_student_worksheet_answerb737c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370078/normal_5ffaa85692a7d.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/efde0b2b-a4fa-4b8b-8fcb-b9955549beff/network_guide_to_networks_8th_edition_chapter_4_review_questions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c23ecd47-9609-4283-bd9f-4485ec34e735/wadezuruleraw.pdfIn PDF document text
    • http://tufuripisaren.epizy.com/welowumirakazarog.pdfIn PDF document text
    • http://vikivafu.epizy.com/john_kehoe_mind_power_read_online.pdfIn PDF document text
    • http://divojeniro.epizy.com/change_management_process_flow_guide.pdfIn PDF document text
    • http://kinadofi.epizy.com/macmillan_advanced_language_practice_with_key.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_off00010cdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CDF 5052 bytes
SHA-256: 490c043d7312e190726b380c01be35ff8f1da137933f5e50062a45d05e8d2656
font_01_sfnt_off00011e0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E0C 10940 bytes
SHA-256: 746339c3d9e184e719886c9d0f36055c64497e7f1e7cc2382e3c1a7141cb56c6

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