Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf7734d8b517f3e1…

MALICIOUS

PDF

78.1 KB Created: 2021-03-22 14:24:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 9ab068ce2aede6273a54f637d4794701 SHA-1: 18cf4bf169be05efdc8ced5d51df4d2dcbf7b4ff SHA-256: bf7734d8b517f3e13f29cba6fa75fcdee2f70b6caa7fae100a1cc34247e49b85
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://jumiwimov.ru/wix?keyword=toon+blast+mod+apk+3443 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4528260/normal_5ff3824aecea1.pdfIn PDF document text
    • http://raguvigawak.mypressonline.com/it_chapter_2_does_eddie_dies_in_the_book.pdfIn PDF document text
    • https://cdn.sqhk.co/nezusoxe/Jibifjh/disney_getaway_blast_apk_mod.pdfIn PDF document text
    • https://mulomaninivoxom.weebly.com/uploads/1/3/1/4/131437045/belupa_nibaponuw_fekemav_lepabesawe.pdfIn PDF document text
    • http://teksol.xyz/how_to_adjust_a_toro_super_600_sprinkler_head0h93f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426813/normal_5ff141b201108.pdfIn PDF document text
    • http://zakewabo.scienceontheweb.net/the_rose_hive_method_challenging_conventional_beekeeping.pdfIn PDF document text
    • https://wufewevaso.weebly.com/uploads/1/3/1/4/131453291/6264737.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402737/normal_5feb34475e36e.pdfIn PDF document text
    • https://bemazoveber.weebly.com/uploads/1/3/4/5/134512295/06a20cf805c43f.pdfIn PDF document text
    • https://fobulosarurek.weebly.com/uploads/1/3/3/9/133997379/5117564.pdfIn PDF document text
    • http://xilenemivagola.mywebcommunity.org/52750969482.pdfIn PDF document text
    • https://cdn.sqhk.co/joziroluxu/qjbkQ4n/dominos_party_box.pdfIn PDF document text
    • http://matras-24.ru/how_to_set_up_a_cake_making_business_from_homee7kmx.pdfIn PDF document text
    • https://cdn.sqhk.co/biwufudi/egjnRic/mavarive.pdfIn PDF document text
    • https://nogulumu.weebly.com/uploads/1/3/4/4/134476008/4e2e935403f.pdfIn PDF document text
    • https://cdn.sqhk.co/fajoliteve/eji7pTg/ivory_color_men_s_shirt.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369928/normal_6004611532361.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471941/normal_6043477264135.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8d5bcf17-53f2-4f21-b585-7a27aef14131.filesusr.com/ugd/7baf93_45560648ff9c4d58af4ebe24bc944ccc.pdf?index=trueIn PDF document text
    • http://supajiwa.myartsonline.com/can_mini_splits_heat_and_cool_at_same_time.pdfIn PDF document text
    • https://cabae152-0d18-4cc7-9545-8711a89e332e.filesusr.com/ugd/607e04_88a2e681c812426f87f71626a26c3113.pdf?index=trueIn 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_off0000e240.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE240 5416 bytes
SHA-256: e757ef810d3605aabc51dbf5d132877580f2a6b2e45d7d9301078eb453f7d7d5
font_01_sfnt_off0000f498.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF498 25752 bytes
SHA-256: 9736ac5206faf5897a3acaaf2a3ab473ea181fb8cd9bf3862e8f79bd1e7f51d2

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