Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f79335f7ec21a33…

MALICIOUS

PDF

79.6 KB Created: 2021-05-09 23:19:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: a23d8b24f12e5304ad5ce5b8ef2a0190 SHA-1: 58a8aded1a5b4fe8f8d0a936787de06699926697 SHA-256: 0f79335f7ec21a331d2c486b7daa0a9c78bdf7fb0098c40350ab963e87f59d41
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 0.9992

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://jumiwimov.ru/strik?utm_term=sims+3+world+adventures+list+of+adventures PDF link annotation
    • http://gvidilon.ru/courtly_airs_and_dances_all_movementskkzqo.pdfIn PDF document text
    • http://cashfree.store/boruti85q7.pdfIn PDF document text
    • http://pojokup.getenjoyment.net/39642431039.pdfIn PDF document text
    • http://lapiwudoxavov.scienceontheweb.net/mufojamob.pdfIn PDF document text
    • http://itdiscounts.pro/genesis_7580g_datasheet11tvl.pdfIn PDF document text
    • http://okrasote.info/can_you_take_the_permit_test_online_in_georgiat6388.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/05f6e027-f37c-48ae-ab3a-22ae5df6f873/90525978745.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdccbed0-2da6-4c15-ac42-7849382a6a9f/xenajojis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abc0ce68-52a9-41f5-80e5-8bcd803ec8b3/14213638165.pdfIn PDF document text
    • https://s3.amazonaws.com/vebenok/fupadilazogakafixoj.pdfIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/kuzoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa3f5a3f-af51-4579-a3d8-7bb3d1b5faa5/straw_bale_gardening.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f145e271-57dd-42c5-a24a-3c67270c83f6/fibujosasexavanatosulezu.pdfIn PDF document text
    • https://s3.amazonaws.com/zozuxukoxo/magic_the_gathering_standard_format_legal_sets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/865d6c4c-0230-4661-8f65-6c107ada7aea/68954934987.pdfIn PDF document text
    • https://s3.amazonaws.com/teximikamukubo/zekepi.pdfIn PDF document text
    • https://s3.amazonaws.com/mupukesunobaga/bleacher_report_twitter_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/rovikibixu/avg_free_edition_64-_bit.pdfIn PDF document text
    • https://s3.amazonaws.com/mafavuzenoliki/39789879675.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c8f16cd-90a8-4f3b-a641-f581e57878c7/52637432577.pdfIn PDF document text
    • https://s3.amazonaws.com/wolina/biggest_video_game_companies_in_america.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52ff02ba-4eb8-4b5d-8931-c1264b0f3ec7/31673178190.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4adfed3-30f3-420e-a6a0-137f5d2dc1e7/julius_caesar_play_act_1_scene_2.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_off0000f66a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF66A 5472 bytes
SHA-256: 5cb9b2e3e6a5c489be0811d4465ec5f7f3d6be3442117bd146be46cfb40015a4
font_01_sfnt_off00010904.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10904 11128 bytes
SHA-256: dd9ad928b8f7281914d8ce04355ad0440204f153dff4ea92b538f65c23306fe4

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