Malicious PDF — malware analysis report

Static analysis result for SHA-256 3810795791ca4643…

MALICIOUS

PDF

74.8 KB Created: 2021-03-19 06:05:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: abb7a465a1b479b896bd0187d4bd74ef SHA-1: 528093cf6a8beced35b0069f615189cbaa2832f1 SHA-256: 3810795791ca464374378ef9418db3d347e996fc711263a5ad2f42651cacae45
126 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or malware distribution attempt. It contains numerous external URIs, including one pointing to 'maypoin.ru', suggesting it's designed to redirect users to potentially harmful content. The PDF's structure and embedded links indicate it functions as a link farm, likely to obscure the final malicious destination.

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://maypoin.ru/wix?keyword=dame+el+mapa+de+puerto+rico PDF link annotation
    • http://lizoguxumugef.mywebcommunity.org/27799961183.pdfIn PDF document text
    • http://likedizar.medianewsonline.com/how_to_install_a_directv_wireless_video_bridge.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459629/normal_5fde30cca2c9e.pdfIn PDF document text
    • http://pemizirevubel.mywebcommunity.org/6896447444.pdfIn PDF document text
    • http://budokudepa.scienceontheweb.net/lego_harry_potter_diagon_alley_2020_release_date.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417414/normal_5fd9932545406.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468838/normal_6041cbcedcc14.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nolewepanuvaxup.epizy.com/insurance_cancellation_email_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/077527e4-0376-45ed-ab50-77c6ff149479/multivariable_calculus_hughes_hallett.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b7576b9-3337-447e-a5e4-f630fb4ae1e8/ravipiweritazojapaluja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ee80fdb-55c5-41f8-866a-28907dd2136b/21585998531.pdfIn PDF document text
    • http://gupatevefojip.myartsonline.com/suwitalazam.pdfIn PDF document text
    • http://sudexixurijaxoz.atwebpages.com/systemverilog_for_verification_3rd_edition_download.pdfIn PDF document text
    • http://zexaxekiki.atwebpages.com/tatedarinafimef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15feeefd-4344-4c9f-8808-9739fdd9522c/procreate_app_for_ipad_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c69ab4a8-e8d1-48a8-92c6-f3b009450837/how_to_write_dual_dialogue_in_final_draft.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7de7d362-d47a-432d-9a84-7a27bfbd2b26/inventory_cost_flow_assumption_examples.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0d875a5-e45f-46db-a0c0-924439b4a123/how_to_turn_off_voiceover_on_ipod_nano_6th_generation.pdfIn PDF document text
    • http://lukigek.rf.gd/rapakizuguketijuji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef2618b1-fcfc-47f1-a7f5-23b08ddd64dc/siemens_signia_hearing_aids_troubleshooting.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_off0000e472.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE472 5040 bytes
SHA-256: 293c8ba8c7315168e069fa32e5547009e3072da954a9e7904db097a21ec9e0a8
font_01_sfnt_off0000f584.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF584 12020 bytes
SHA-256: 66d5b6cf05d42c1f63c20b9c7bcd167a0a0edd7db2a2ae4696bed9c851dd6f24

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