Malicious PDF — malware analysis report

Static analysis result for SHA-256 0afea16bd3e4fe50…

MALICIOUS

PDF

79.1 KB Created: 2021-04-01 18:15:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 82b454633e958d6384d012a70fa47774 SHA-1: 58ffd9da1aadf4b024f183a3d9271951ce03163b SHA-256: 0afea16bd3e4fe500599ff120a9781a4038b3337c433d7761706de9e4461b566
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 0.9996

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://kuzutuzo.ru/award?keyword=propiedades+de+los+metales+alcalinos+pdf PDF link annotation
    • http://tarenutufitox.66ghz.com/astronomy_magazine_september_2018.pdfIn PDF document text
    • http://loveantravel.xyz/north_pole_rock_and_roll_music_k87tpq1.pdfIn PDF document text
    • http://sallles.ru/pelililejorakkmdk2.pdfIn PDF document text
    • http://sudoniwitexife.22web.org/film_genres_list.pdfIn PDF document text
    • http://rimarilomikozu.medianewsonline.com/didesezofotavuw.pdfIn PDF document text
    • http://qiwi-wallet.online/figurudunarexuziwipek7ki7u.pdfIn PDF document text
    • http://wutigesekigaj.22web.org/xulegawiroditagefiro.pdfIn PDF document text
    • http://hookup666.site/vyprvpn_free_filehippok0o16.pdfIn PDF document text
    • http://jozipuvuwuzaj.mywebcommunity.org/62834484500.pdfIn PDF document text
    • http://befujukipepejem.mygamesonline.org/ncert_class_12_biology_book_2020.pdfIn PDF document text
    • http://egosikenclub.com/fundamentals_of_structural_analysis_4th_edition_solution_manual_leetzb1pt.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/991b7cac-e1de-49c1-817e-ec5c834f2b64/how_does_plate_boundaries_cause_earthquakes.pdfIn PDF document text
    • http://kafopozunu.epizy.com/paxawifiguxu.pdfIn PDF document text
    • http://dezinolabebosod.atwebpages.com/56269798525.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9da63880-50df-43ef-9631-71b16bd4e69c/tofobagigubig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00139768-7695-47c6-8ad7-3fc3c06b8b17/dugilode.pdfIn PDF document text
    • http://dovanokeji.epizy.com/71441850488.pdfIn PDF document text
    • http://palowok.epizy.com/how_to_download_teach_your_monster_to_read.pdfIn PDF document text
    • http://wigebinijeg.epizy.com/julius_evola_best_books.pdfIn PDF document text
    • http://dajajubofu.rf.gd/how_much_do_banquet_servers_make_at_hilton.pdfIn PDF document text
    • http://lojosikol.epizy.com/telecharger_whatsapp_plus_gold_apk.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e87e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE87E 5088 bytes
SHA-256: bd28fc059323b8b36edd811005a806ecd4fbee43d9b786e88594136ca8dd22f0
font_01_sfnt_off0000f9a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9A8 11492 bytes
SHA-256: 8ba50a6505f704fda28de2dd36f02d99eb24032a6cdccb0e54ec41a8ae899728
font_02_sfnt_off00011ef5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EF5 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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