Malicious PDF — malware analysis report

Static analysis result for SHA-256 e760bedaa5ff3038…

MALICIOUS

PDF

73.4 KB Created: 2021-03-18 12:50:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: bab6a47ef54ddd0e8ba27450512bf1f8 SHA-1: 10a415529ad9ee43d7297539f2057e8a3704547b SHA-256: e760bedaa5ff3038ce2d68f6898411976be39204a7c5929049ddac54025c94f4
126 Risk Score

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 0.9992

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://jumiwimov.ru/award?keyword=number+coloring+worksheets+for+kindergarten+pdf PDF link annotation
    • https://rinotawobuv.weebly.com/uploads/1/3/4/7/134768279/siwokix-wefuwanijuf-wenoxo.pdfIn PDF document text
    • https://mugokirupela.weebly.com/uploads/1/3/2/6/132681863/8964850.pdfIn PDF document text
    • http://beautysss.site/human_trafficking_real_stories_in_the_united_statesehbie.pdfIn PDF document text
    • https://cdn.sqhk.co/libarazituw/d2iaAQK/cpa_marketing_guide_bangla.pdfIn PDF document text
    • http://zisuroto.mygamesonline.org/69720134080.pdfIn PDF document text
    • https://cdn.sqhk.co/wanaxowuwot/jghhWvS/bombastic_adj_in_a_sentence.pdfIn PDF document text
    • https://fakedowekiz.weebly.com/uploads/1/3/5/3/135314463/fezuwisamozesuzuwose.pdfIn PDF document text
    • http://vofufime.mypressonline.com/vodijawozumesapifutod.pdfIn PDF document text
    • http://noksipals.online/what_is_social_artistcgdyg.pdfIn PDF document text
    • http://razvivatel.blog/how_to_change_the_time_on_a_citizen_eco_drive_perpetual_calendari8ys4.pdfIn PDF document text
    • http://changepass.online/tablature_solo_guitare_le_penitencier9j8xw.pdfIn PDF document text
    • http://ketotreno.buzz/93616798891by96q.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xigipir.epizy.com/femedusanez.pdfIn PDF document text
    • http://gapesikobupag.rf.gd/oswaal_books_for_class_12_maths_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/novipaliwid/nosixowe.pdfIn PDF document text
    • https://s3.amazonaws.com/likadojivivofu/jitedigukavixologesow.pdfIn PDF document text
    • http://xefowipiv.rf.gd/57371069603.pdfIn PDF document text
    • https://s3.amazonaws.com/muxozuvalubi/exercise_bike_screen_not_working.pdfIn PDF document text
    • http://xenupodaxamutev.rf.gd/mr_coffee_cafe_latte_maker_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/juzewojavomofew/mukixarilobozexupi.pdfIn PDF document text
    • http://pexirud.onlinewebshop.net/repotixedanuduli.pdfIn PDF document text
    • http://lomolawowetaxu.rf.gd/7564205698.pdfIn PDF document text
    • http://wugerubuvugox.myartsonline.com/britannia_biscuits_price_list.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_off0000e176.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE176 5836 bytes
SHA-256: bcfbd213bdb7f8c861029611ea073ed2ef1c314263e91d7e7dd22bbdbbe47243
font_01_sfnt_off0000f53b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF53B 10040 bytes
SHA-256: 36317830f9d44a9016072a7ad4e4a8fd10b1c22a2acaa6a66c6721f077541ba5

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