Malicious PDF — malware analysis report

Static analysis result for SHA-256 b719471aaee58422…

MALICIOUS

PDF

78.7 KB Created: 2021-06-05 22:48:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1d585fe819f3d1714dc6534f7eb4d8b0 SHA-1: a7ac30845cc9078eca579f088b2624136ba6247c SHA-256: b719471aaee584221d602c9b8760e21e8c233a5d4d50a1c68beff02dcb16bfd0
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 0.9997

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://jottigo.ru/123?utm_term=betting+prediction+apps PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4376612/normal_603157cce078f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470545/normal_60493daf6b47d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415754/normal_606958979f5f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446165/normal_602290de3b2d2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450045/normal_5fdfb6ce1d578.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484364/normal_600fac7c95b71.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392651/normal_602723f5887cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375890/normal_602eab012595a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474736/normal_6008e9803b55a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379626/normal_605f2a0373ede.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471996/normal_6054b1f4917df.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501214/normal_6000becc78b94.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4414331/normal_60b4c6df27870.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453344/normal_600479a110d37.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lifelekufa.pbworks.com/w/file/fetch/144561942/how_much_is_a_1995_charmeleon_pokemon_card_worth.pdfIn PDF document text
    • http://jajafad.pbworks.com/w/file/fetch/144420015/61992626876.pdfIn PDF document text
    • http://kipizasuzeda.pbworks.com/f/download_harvest_moon_fomt_gba_bahasa_indonesia.pdfIn PDF document text
    • http://wipadewor.pbworks.com/w/file/fetch/144669837/sasega.pdfIn PDF document text
    • http://werinenimuta.pbworks.com/w/file/fetch/144628935/cuanto_son_150_gramos_en_tazas.pdfIn PDF document text
    • http://zizovitunex.pbworks.com/w/file/fetch/144613938/download_the_sims_mobile_mod_apk_data_offline.pdfIn PDF document text
    • http://siseraxoru.pbworks.com/f/43815400611.pdfIn PDF document text
    • http://vedufid.pbworks.com/f/nenujafogenoxawukuxog.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_off0000f468.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF468 5256 bytes
SHA-256: 3c40fdb8d2de9dfa13509d955a1d10e0cdbb71d43f1d2eab90a279a8867afb2e
font_01_sfnt_off0001065c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1065C 11472 bytes
SHA-256: 06439df846d501a055bb9533d7fd28a5722c7b3b4c41f211b560b9769db0dd4b

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