Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea2e8201bb9bac71…

MALICIOUS

PDF

73.6 KB Created: 2021-03-26 04:52:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 98c7252dc07d00cdb4de2e8cb788480e SHA-1: 9c480a24904eda498705a09026bad545b2113386 SHA-256: ea2e8201bb9bac71a32ae964563e58cd116e3b2a10451ccc3e0c2f4f0a8cb242
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9999

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://ponafet.ru/aws?utm_term=diferencia+entre+animal+y+ser+humano+filosofia PDF link annotation
    • http://shlifovka-pol.website/10th_std_english_book_2020o5f6f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451766/normal_60535a6a23a28.pdfIn PDF document text
    • http://eduha.online/rinizerexuxarortkbx7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445128/normal_603d64e0b3c2d.pdfIn PDF document text
    • https://zagodifibom.weebly.com/uploads/1/3/0/7/130775293/bibuge.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447912/normal_5fe6a72b868d0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483836/normal_5fdee587b0f45.pdfIn PDF document text
    • http://nesobaka3.xyz/dora_the_explorer_and_friends_games7u9jp.pdfIn PDF document text
    • http://erogan24.website/ge_spectra_electric_oven_not_heatingff070.pdfIn PDF document text
    • http://misitaka.iblogger.org/sazoj.pdfIn PDF document text
    • http://taxilozevuj.iblogger.org/badnam_song_video_full_hd.pdfIn PDF document text
    • https://cdn.sqhk.co/norekabalak/4jh40gh/73834625091.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402722/normal_604ae1315ef04.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444351/normal_602d611383f2f.pdfIn PDF document text
    • https://sifavebizibi.weebly.com/uploads/1/3/4/0/134040704/gugawapojutazur.pdfIn PDF document text
    • https://cdn.sqhk.co/pekotegafod/hhFbi9O/54257926859.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pivunovukemo.epizy.com/konsep_persamaan_dasar_akuntansi.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_off0000e1f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1F8 5220 bytes
SHA-256: 7df45fe03cd958554814c3533479e0574da0a237d56bdfcdbf0dd34e4046c1d2
font_01_sfnt_off0000f3a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A0 11776 bytes
SHA-256: 24b13054ad56dab05ec80105e39aeec357f7a352a111ca392c3e3acce9fc3d89

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