Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0be766b0d3a605d…

MALICIOUS

PDF

77.6 KB Created: 2021-03-18 01:31:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 27f358f8100373eaa1814b00c83b73a2 SHA-1: 39c1b802d66703cd076611b415f6adc869737940 SHA-256: f0be766b0d3a605df2d36f954f57f7d201cab9164fd44269f34fc565e3d6405a
126 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable domains, suggesting a link farm or redirection mechanism to host malicious content. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a deliberate attempt to create a large number of links on potentially untrusted hosting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://leonvi.ru/wix?keyword=avast+business+management+console PDF link annotation
    • http://lazisirogabidir.mypressonline.com/adjectives_and_adverbs_practice.pdfIn PDF document text
    • http://mumopajikex.mygamesonline.org/zerufal.pdfIn PDF document text
    • http://smartroom.pro/satagonumufifr7eg.pdfIn PDF document text
    • http://drnextact.xyz/how_to_rappel_gta_online9yrp1.pdfIn PDF document text
    • http://govnosiakxws.online/total_war_shogun_2_steam_reviewshh053.pdfIn PDF document text
    • http://tb-films.ru/kixowetajikojumilutuxonefjoqb.pdfIn PDF document text
    • http://good-production16.site/37864877442kxwgy.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/bafbb3ab-6a50-4bff-ba63-b1d2d7785586/piano_adventures_level_3a_lesson_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/533d01eb-4db6-41fd-bd7e-c24902a6d45f/zuvuserubivef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52dab88b-9802-416f-9604-1f33b8581e10/96954403436.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/168b0692-302e-4631-957c-ceed7a349c78/bible_quiz_for_kids.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a56b47a-4fbf-448c-a140-7f3678f8a8eb/samsung_sm-t350_charging_port_replacement.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31e97eee-3918-46d6-8f9c-4ae717c0adb0/59326304732.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b3dbdc4-13d2-4346-9069-caa8efae8b07/how_to_make_a_solubility_curve_on_google_sheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88bfd8bb-4c18-4224-97d2-ad41fb76a5d8/neil_degrasse_tyson_universe_netflix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26d19667-8cc4-47fe-9f46-7a7bd8c2af6d/can_you_add_memory_to_a_samsung_chromebook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d04fd93-abba-40b0-a678-d9cb1d94b6d9/louise_hay_sana_tu_cuerpo_frases.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c36e053-d09c-44d5-8f8e-971795491a1c/nadewumo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57fe8abe-1299-4329-a0dc-f01451169eb8/13462135216.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cea49e3-37da-435c-b367-2a2c5c341062/lipegejapizazota.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_off0000f1fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1FD 5212 bytes
SHA-256: 05d7a88edefea43b2d7b32855bed20e3808ead994030a7a1de0e78837480bb23
font_01_sfnt_off000103b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103B3 11028 bytes
SHA-256: 158917dd787a0847cb4bf10629926d0493b9106a9fd5122d86028d7382e71a68

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