Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff37f4706fd33c47…

MALICIOUS

PDF

79.8 KB Created: 2021-03-16 07:38:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e08d6f96ea72f8b8ed14b3e940b5003e SHA-1: 6af1a1d712fc0bf67eb4affb426224adf5f0fbc3 SHA-256: ff37f4706fd33c47398985773dcf4baee7a7ec2a30b8d31cc415c18f09c6bde8
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous external links, including one that appears to be a keyword-based lure for 'google drive e portfolio'. The presence of a 'SE_DOWNLOAD_BUTTON' heuristic and a high ML score suggests a phishing or malware distribution attempt. ClamAV also detected this file as a phishing trojan, reinforcing the malicious nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://dugedepap.ru/wix?keyword=google+drive+e+portfolio
    • https://cdn.sqhk.co/gixixutiji/1KhjAbh/euro_truck_evolution_simulator_mod_apk_free_download.pdf
    • https://cdn.sqhk.co/jirozixo/pgjwOMf/magic_snake_puzzle_shapes.pdf
    • https://cdn.sqhk.co/tigixexaxi/e10yDgc/philadelphia_flyers_logo_patch.pdf
    • http://soxapisurer.22web.org/pudilemaxobufa.pdf
    • http://zatoxuvisovapuf.sportsontheweb.net/landlocked_countries_in_the_world.pdf
    • https://cdn.sqhk.co/nisugavu/jfiegdn/draw_it_game_app.pdf
    • http://bigijawiv.scienceontheweb.net/46666469993.pdf
    • https://cdn.sqhk.co/mapiwoda/cQgjhhj/nudoze.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/dadupawo/li_ning_badminton_racket_guide_2018.pdf
    • http://fadezanunadafik.myartsonline.com/how_to_find_the_mass_of_one_sulfur_atom.pdf
    • https://c480cc3d-c044-45b7-a7fa-747782367dcd.filesusr.com/ugd/a26f59_ba8dd4bf128c442cb72cdd423c551f4f.pdf?index=true
    • https://s3.amazonaws.com/lopeteb/3d_nls_health_analyzer_software.pdf
    • https://a43ab9c2-5efb-4cee-ac06-b782a0f5e207.filesusr.com/ugd/4826f5_ccb7ea75379041c1976c7d37f14f1e4d.pdf?index=true
    • http://wegizadix.rf.gd/wuwujedunoka.pdf
    • http://rawarawoxegig.epizy.com/37609890805.pdf
    • http://jomufutoxafu.epizy.com/how_do_i_update_my_bushnell_neo_ion_watch.pdf
    • http://zuvidetalenaras.epizy.com/wixifunoxag.pdf
    • http://zafaxomerav.epizy.com/free_ach_enrollment_form_template.pdf
    • http://suwuriru.onlinewebshop.net/asepsie_et_antisepsie.pdf
    • https://s3.amazonaws.com/midipes/tebuwuxumid.pdf
    • http://gofudawaropuz.epizy.com/85003763356.pdf
    • https://s3.amazonaws.com/goneduzum/what_are_some_weather_symbols.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc2b.bin
a5bf30ffaa495221e66d1c2e0271fceba1578a364fa97eee53325abfd25e7162		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC2B 4912 bytes
font_01_sfnt_off00010d03.bin
8a65f1c34f1ff3a1ecbfe1b22c5ebad1da2a6ec9531aac3cd15731ecc5b683a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D03 10900 bytes

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