Malicious PDF — malware analysis report

Static analysis result for SHA-256 b59dde510bd39703…

MALICIOUS

PDF

107.4 KB Created: 2021-03-14 06:03:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 921eb4d088bd1b097ae519edc19d57ee SHA-1: 7410ab34f8b60484796968d071ba56661acf1b0f SHA-256: b59dde510bd39703a874264b8d2589e86092dd876bb554c26ca943e4c64108fb
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://botokaw.ru/award?keyword=dise%25C3%25B1o+bioclimatico+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4451231/normal_6028be32911cd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367952/normal_5fe3bd3b13cdb.pdfIn PDF document text
    • http://jejasuresefuru.22web.org/risk_arbitrage_an_investor_s_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443799/normal_602d712717493.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489599/normal_6037ba22f376d.pdfIn PDF document text
    • http://mnatural.space/kabipapudabibobixuzifawwou3q.pdfIn PDF document text
    • http://wisidakofaxom.iblogger.org/descriptive_essay_format.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452376/normal_6003f4a002256.pdfIn PDF document text
    • http://fullcreditreport.info/what_is_the_message_of_the_national_anthem_black_mirror563ru.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lokimutopilar.epizy.com/55889737805.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbaa0814-55d9-45f0-b5bf-2009a7f4f7db/yaskawa_ac_drive_v1000_manual_portugues.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b5bdd0a-9068-4e3a-9ce5-dbd799429f94/what_is_color_constancy_and_what_are_its_limitations.pdfIn PDF document text
    • http://nopetavu.rf.gd/bodufivomamawovesekumomix.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/rokiluvinalejovimurowa.pdfIn PDF document text
    • https://s3.amazonaws.com/fomudebipefasu/poretimugaworej.pdfIn PDF document text
    • http://bexatati.epizy.com/duzakezozozusije.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c19510f-607d-434e-90bf-dcab71313c33/sokekomasezefifi.pdfIn PDF document text
    • https://s3.amazonaws.com/retisovojor/toboreje.pdfIn PDF document text
    • https://s3.amazonaws.com/limepusotanal/colour_atlas_of_medical_microbiology.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e90b563-3306-4897-a9f8-03927bdc40f0/the_disaster_artist_obra_maestra_pelicula_completa_en_espaol_latino.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/825d0703-d5fa-44fb-9ed1-94c89425f7c2/how_many_calories_in_a_small_iced_coffee_with_almond_milk.pdfIn PDF document text
    • http://zubafazebet.epizy.com/kutulo.pdfIn PDF document text
    • https://s3.amazonaws.com/bulalowisu/microsoft_original_spider_solitaire.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_off000165ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x165AD 5556 bytes
SHA-256: 5ab5a7511100d911c90a00ee21ac6c2e12c55a7e5306d185aedd2a19d5beac3a
font_01_sfnt_off00017843.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17843 11672 bytes
SHA-256: 89e4425465053c4b9628eb04b42b2f29614f3f93181e1e4177fbd19f95bbc3d9

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