Malicious PDF — malware analysis report

Static analysis result for SHA-256 662725b2699bdd42…

MALICIOUS

PDF

75.5 KB Created: 2021-03-14 07:17:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: b38ab6edb949cc29866bed706880ba2f SHA-1: b0e05da53be916aeb90513d600550464abce49e9 SHA-256: 662725b2699bdd427650a7cd48ffad5e130b32006a9b24055dab024e80493988
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which are associated with link farms and disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs point towards a common phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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=the+kooples+size+guide+womens PDF link annotation
    • http://reduslimitalia-official.website/vawamuporijosoizuha.pdfIn PDF document text
    • http://yesnutural.space/rebowawebxs93d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416927/normal_600e8a3d02fb6.pdfIn PDF document text
    • http://eyebrowthreadingdallastx.com/lereporumezok53lh.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425910/normal_5ff5a5944d453.pdfIn PDF document text
    • http://jefaritixe.22web.org/pigolewotegodexuduvapif.pdfIn PDF document text
    • http://theandyhong.com/6273015177hdvz4.pdfIn PDF document text
    • http://mukesuzovuvo.22web.org/the_book_of_thomas_the_contender.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447280/normal_6001d37a9d5ad.pdfIn PDF document text
    • http://vuvuga.xyz/bomisabagosilubivolukunvmugg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392660/normal_5fd15c84d1c8e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387565/normal_5feb017fdbe13.pdfIn PDF document text
    • http://kapusta.pro/49946390510u154b.pdfIn PDF document text
    • http://vorgazme.com/apache_camel_developer_s_cookbook_download1dsr4.pdfIn PDF document text
    • http://hook-up.fun/zte_z222_sim_card_sizea0sfh.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d05facca-fce1-48c8-8376-52c827f0c5fe/classical_guitar_music_for_beginners.pdfIn PDF document text
    • http://genolesatoj.epizy.com/rising_sun_game_rules.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a254ca1-d863-441c-9d92-7179f4025c55/53445118255.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d7b7716-f2c7-48e7-9849-8aafd4dcd3b6/eberron_3.5_character_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/648d727f-7c49-4b4a-883b-28a9c3e24bff/are_metal_roofs_loud_when_it_rains.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/daf673f3-415e-4b16-86ca-78f106bdd7e3/luxesipis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9ae9f82-f9e0-4cd9-b4ce-fda455cc9dfc/593122045.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f02b4c06-5ef9-41b4-8a61-e6dff8c9774d/32549686371.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/632418ae-27fd-4187-baaf-361635ab4159/74133632993.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d832a33-d169-40a5-a580-b04b8f180729/xawatavir.pdfIn PDF document text
    • http://tikokowekujuw.epizy.com/2019_world_happiness_report_ranking.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_off0000e9b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9B7 5224 bytes
SHA-256: 17ef5a00265a2f7b2777f60e94dd12401e9c0f2246de3519e52b311c4684958c
font_01_sfnt_off0000fb72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB72 10924 bytes
SHA-256: c66415adf4bbc72fa1cf3d85b58891e1b56a77d7daebbe34ad47371742837ec9