Malicious PDF — malware analysis report

Static analysis result for SHA-256 03e5e85daf12bcd0…

MALICIOUS

PDF

77.8 KB Created: 2021-02-18 09:07:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: ce00302b713ca4f992356d5ada3c92ee SHA-1: 858c019af6a70d326adb9ec932b142d7997442cb SHA-256: 03e5e85daf12bcd01bf46b4310dcb3d17be56aabcf2004b9ddd0d76b6d7f4e3e
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/wix?keyword=pokemon+soulsilver+apk PDF link annotation
    • https://cdn.sqhk.co/zubuwebofe/hitjjhb/xinawanomavunewudafav.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386079/normal_600f10d390e4c.pdfIn PDF document text
    • https://cdn.sqhk.co/verexumifo/iibhjje/fokumevebinituvewur.pdfIn PDF document text
    • http://kufemotobenin.66ghz.com/73279400096.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373517/normal_602291b0d65d7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466413/normal_5fe28421eb1bb.pdfIn PDF document text
    • https://cdn.sqhk.co/xilelawemu/gjQijhe/pick_me_up_3d_game_download.pdfIn PDF document text
    • https://cdn.sqhk.co/tumexifukevu/jgf0Mhg/hepatitis_a_prevention_cdc.pdfIn PDF document text
    • https://cdn.sqhk.co/zukasedu/fihjcP3/zesaxe.pdfIn PDF document text
    • https://cdn.sqhk.co/ruwonumatag/jlyidfS/f1_manager_2020_series_8.pdfIn PDF document text
    • https://cdn.sqhk.co/fegozanodedu/zOerWhg/slaughter_2_prison_assault_apk_obb_download.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/nowonovege/folunezujewo.pdfIn PDF document text
    • https://s3.amazonaws.com/xurixado/48969578531.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/metodos_anticonceptivos_naturales.pdfIn PDF document text
    • https://s3.amazonaws.com/wixatax/bambukat_full_movie_in_480p.pdfIn PDF document text
    • http://gonidiwofove.epizy.com/free_lagu_hanya_rindu_andmesh.pdfIn PDF document text
    • http://jadupapobixe.epizy.com/14069106833.pdfIn PDF document text
    • https://s3.amazonaws.com/turip/39407830428.pdfIn PDF document text
    • http://dodudulu.epizy.com/origin_of_word_answerable.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d499.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD499 5092 bytes
SHA-256: 0130d1fe0240b19a8611789d4f5c014113464336778dae29fcd41a91c4201a02
font_01_sfnt_off0000e5d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5D7 3024 bytes
SHA-256: f271277bc92c8ec255f016eb89af31946ace6cee13b85d2ca72bafc089855a25
font_02_sfnt_off0000f10b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF10B 10280 bytes
SHA-256: 34983e06ccc61bcb46704b62ed60d11f3f76a7cc19f7df1ec6e9c2d375ba8bae
font_03_sfnt_off00011495.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11495 16092 bytes
SHA-256: 9af6fc3bf9d751f70540aea0fa47faa159a3604992cda23d2adcda3ffc5346b2

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