Malicious PDF — malware analysis report

Static analysis result for SHA-256 1924dc03327dbf49…

MALICIOUS

PDF

74.8 KB Created: 2021-02-21 01:13:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 9f8cbb1074e0b38f0bd33d2151f8b866 SHA-1: e8dbe55645420422030fb736e6ad3d5b7eb5ceac SHA-256: 1924dc03327dbf49b5676c10f9b67e5ee3af4e4956325371f0fc56df55d9cb16
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 0.9998

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://maypoin.ru/123?utm_term=how+to+draw+a+anime+girl+face+easy PDF link annotation
    • https://cdn.sqhk.co/soxuvezosapa/Cjijgij/halloween_party_favor_ideas_for_toddlers.pdfIn PDF document text
    • https://cdn.sqhk.co/jakufomego/cghhcHd/5463782819.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386613/normal_601a9f3aaa915.pdfIn PDF document text
    • http://raicen.com/beckhoff_hmi_engineerings04pu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450340/normal_5ff417a05fe21.pdfIn PDF document text
    • http://com-signto2.xyz/sokorumelofeme7h0sk.pdfIn PDF document text
    • https://rezedutusijilik.weebly.com/uploads/1/3/2/7/132710703/3292477.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413236/normal_601ab74b83d22.pdfIn PDF document text
    • https://rijagadufe.weebly.com/uploads/1/3/1/6/131606992/rimalijo-tijebogo-jijeraduxerade.pdfIn PDF document text
    • https://cdn.sqhk.co/daborofus/ij7gECs/ruxenavetajilomanu.pdfIn PDF document text
    • https://cdn.sqhk.co/tufuboloruj/rzdoihi/mod_for_minecraft_morph.pdfIn PDF document text
    • https://jofudetazowus.weebly.com/uploads/1/3/1/6/131606688/jijukomezire-mabojiloxeke-loxumu.pdfIn PDF document text
    • http://teren.fun/mad_max_fury_road_full_movie_with_english_subtitles_downloadhhnfu.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/fizaxo/833867063.pdfIn PDF document text
    • http://rakikazava.rf.gd/63796300521.pdfIn PDF document text
    • https://s3.amazonaws.com/rubidokezive/definite_and_zero_articles_exercises.pdfIn PDF document text
    • https://s3.amazonaws.com/zonebon/badle_badle_lage_audio_song.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_off0000e6a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6A4 5496 bytes
SHA-256: 3aa9da2ec780ddd5743251abba18b7acd3b36181d8a44a1de8738a938d5c71c7
font_01_sfnt_off0000f958.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF958 10748 bytes
SHA-256: 890fcb10a6b7bf0c60a9d605abf58ca18d09712359c8be9620c5ecf48b6cda2e

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