Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0d8b24bc7f45aa9…

MALICIOUS

PDF

75.6 KB Created: 2021-02-28 06:36:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 50d08c01cde7a4ab415a42fc89c10a39 SHA-1: 2334cc736af48dca12f893b6c911534ff6395398 SHA-256: a0d8b24bc7f45aa90deca65a4766e7bd3dac6c94a425614cc3e0f2781a17d8dc
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URIs, with a primary suspicious URL pointing to 'lozipotod.ru', suggesting a phishing or malware distribution lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this by identifying the PDF as a link farm on disposable hosting, likely designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://lozipotod.ru/award?keyword=inferno+story+by+dante+alighieri PDF link annotation
    • http://xufubub.iblogger.org/92239654714.pdfIn PDF document text
    • https://cdn.sqhk.co/xolizoxime/gfgjczd/81516744260.pdfIn PDF document text
    • http://shoop-fp.ru/gulabi_aankhen_remix_mp3_download6fj23.pdfIn PDF document text
    • http://geosen.net/comparative_adjectives_exercises_macmillan2khps.pdfIn PDF document text
    • http://lnstagramverifiedbadge-form.com/613890998261wwsa.pdfIn PDF document text
    • http://efarbok.xyz/who_really_discovered_america_answer_key2mcvn.pdfIn PDF document text
    • http://lazujifoxupa.getenjoyment.net/lumugijevotejubumunowumu.pdfIn PDF document text
    • https://cdn.sqhk.co/feketukadoz/g2fvhg6/59899811620.pdfIn PDF document text
    • http://ledy66.net/crisis_communication_plan_pptnk75z.pdfIn PDF document text
    • http://lixodamevurobar.mygamesonline.org/dell_latitude_e7450_price_in_bd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bigofuzov.epizy.com/review_rinnai_ri-602_ag.pdfIn PDF document text
    • http://refusunono.onlinewebshop.net/ridoxamutuxomedasefo.pdfIn PDF document text
    • https://s3.amazonaws.com/wutisigila/brandenburg_prussia_guide.pdfIn PDF document text
    • http://wusanobe.rf.gd/47800606872.pdfIn PDF document text
    • http://wugujub.onlinewebshop.net/husqvarna_55_rancher_value.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_off0000eba5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA5 5348 bytes
SHA-256: 8b4c8ff9a56f41ebf1acc547cbeeeef4b08743835aee302b05a8b977d866ecac
font_01_sfnt_off0000fdd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDD5 10452 bytes
SHA-256: b7ff471261c11872805dd7a48d6a1e7a7762d87c85b2ee38fa0ea22c2a576873

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