Malicious PDF — malware analysis report

Static analysis result for SHA-256 e70410c2b84d52da…

MALICIOUS

PDF

73.6 KB Created: 2021-03-17 18:12:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: cfabe8487d5e80f19f6834c69a08c479 SHA-1: b2504e8d7bdb9140ff25f6ffdf7a91ba2a6738c6 SHA-256: e70410c2b84d52da43fc2ccbb22fd5f336e1dffdc33cb01253075225eff13ca3
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains an external URI pointing to a suspicious domain, likely intended to host malicious content or redirect the user. The document body, though partially corrupted, suggests a lure related to 'comparative superlative exercises'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://mezovuduw.ru/123?utm_term=comparative+superlative+exercises+pdf+beginners PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370560/normal_60112fe68420f.pdfIn PDF document text
    • https://fimetopim.weebly.com/uploads/1/3/4/3/134399480/wavopela.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470537/normal_5fe8206581de5.pdfIn PDF document text
    • https://cdn.sqhk.co/zabadiripo/qhjjjhh/eclipse_java_ee_mac.pdfIn PDF document text
    • https://suzoniku.weebly.com/uploads/1/3/4/4/134456843/jaluder.pdfIn PDF document text
    • https://texapusozos.weebly.com/uploads/1/3/1/4/131407592/danur.pdfIn PDF document text
    • https://cdn.sqhk.co/fejukomus/dhgegjA/mercado_pago_mexico_meses_sin_intereses.pdfIn PDF document text
    • https://doxekitonibi.weebly.com/uploads/1/3/5/3/135326555/caeeb9cf1d4492.pdfIn PDF document text
    • https://jozevupipe.weebly.com/uploads/1/3/5/3/135346753/wopisogonov-lazis-koweme-duxebekule.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453553/normal_5ffaf28daf19e.pdfIn PDF document text
    • https://cdn.sqhk.co/jizapamilizo/gzhbgg0/fluxx_651_hoverboard_charger.pdfIn PDF document text
    • http://tezuveripoxub.mypressonline.com/jack_reacher_tv_series_on_amazon_prime.pdfIn PDF document text
    • https://cdn.sqhk.co/nezuxada/G4hbhe5/kodibagovaru.pdfIn PDF document text
    • http://vodabutopidaru.getenjoyment.net/66151762023.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xowasosuf/dashboard_templates_excel_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7a2163f-fabf-42c3-94a1-7e729db12c4c/decision_tree_template_ms_word.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/724ad451-6571-449c-a957-bca6ffac8610/bedford_book_of_genres_2nd_edition_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d26537d-a0d1-4dbb-8e62-5b2159bb4b33/wahl_cordless_magic_clip_clipper_metal_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/serogajugomiji/best_life_changing_novels_of_all_time.pdfIn PDF document text
    • http://zilowovuv.atwebpages.com/75245924937.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/145244b4-3ec8-418b-8b71-0ae2ba7e8a6f/kenwood_dpx500bt_color_change.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/26392812383.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51424f49-2cce-4fbb-8deb-a9c6ad90152f/vedanobufagemor.pdfIn PDF document text
    • https://s3.amazonaws.com/rodiligarexo/12519090339.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_off0000e109.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE109 5648 bytes
SHA-256: e521df6d95408f3346a472355adc24a779828673b9658ebceafc4af539ac5951
font_01_sfnt_off0000f42c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF42C 10592 bytes
SHA-256: 23e7c3d4c1c0690f6bc190321489f99bc9b42645c825ace94be2121ff705b835