Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcedc9974017440a…

MALICIOUS

PDF

75.0 KB Created: 2021-03-18 03:16:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 9c4b2f47afd2bf2d106d3d6d5342b5f5 SHA-1: c6f746fb9aea1fbc2fd93453ec2bcaf548e526a0 SHA-256: dcedc9974017440a725cb92231d215dbbe38d91e9fb3f103af76363627eddb59
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, containing numerous external URIs pointing to disposable hosting. One of the primary external URIs, https://mezovuduw.ru/123?utm_term=yoshi+island+music+sheet, suggests a lure related to music sheets to direct users to a potentially malicious site. No scripts were extracted, but the PDF structure and URI patterns are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://mezovuduw.ru/123?utm_term=yoshi+island+music+sheet PDF link annotation
    • http://fuxanujibiz.mygamesonline.org/magnificat_taiz_partition.pdfIn PDF document text
    • http://alsamcctv.com/tuxitolukujazewetejn6e9x.pdfIn PDF document text
    • http://mowefopovog.mywebcommunity.org/78924162700.pdfIn PDF document text
    • https://jewukezi.weebly.com/uploads/1/3/0/9/130970006/8235115.pdfIn PDF document text
    • http://ragofilud.medianewsonline.com/lalubikoxedisanagolo.pdfIn PDF document text
    • http://gouliwer.online/nitowabupixuzvexny.pdfIn PDF document text
    • https://getenulezawo.weebly.com/uploads/1/3/4/8/134897364/9907816.pdfIn PDF document text
    • http://luxomozuk.mypressonline.com/85385888383.pdfIn PDF document text
    • http://xiwakaravivomik.scienceontheweb.net/48949721037.pdfIn PDF document text
    • https://tibiwoxot.weebly.com/uploads/1/3/4/8/134881218/pipefetebupa_lopafiromaji_dusimug_disevuwupi.pdfIn PDF document text
    • http://witomemu.scienceontheweb.net/65997160639.pdfIn PDF document text
    • http://geloritiveda.mygamesonline.org/how_often_to_change_kangen_filter.pdfIn PDF document text
    • http://kojazunupetip.mygamesonline.org/43043840011.pdfIn PDF document text
    • http://elinekici.online/2006_ford_focus_zx3_owners_manuallabyj.pdfIn PDF document text
    • https://xisotufonadate.weebly.com/uploads/1/3/5/3/135384012/saxigal_xizimilujazuvo_lelow_lufogan.pdfIn PDF document text
    • http://salonlabs.xyz/citizen_skyhawk_at_reviewx95hf.pdfIn PDF document text
    • http://lavka-karamel.ru/rhetorical_device_definition_literature3nbgi.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/0c41cd66-302f-43ff-aec7-3f2a6a0112f1/do_you_like_being_an_accountant_reddit.pdfIn PDF document text
    • http://bosagiriwamokin.onlinewebshop.net/formulation_of_enteric_coated_tablets.pdfIn PDF document text
    • http://bitines.myartsonline.com/fidadimetateletonisizojo.pdfIn PDF document text
    • http://tanonarimunal.myartsonline.com/fakagomukodogerawib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bac62097-3be8-4f31-98dd-0c3ab042acfd/dell_optiplex_790_specs_sff.pdfIn PDF document text
    • http://sijadogif.atwebpages.com/5000_year_leap_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6203d4d-4aaa-4a71-821f-893eb91da321/15418231662.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d267f85-9307-46c3-911a-5e327e2e2dde/free_online_zombie_survival_games_no_download.pdfIn PDF document text
    • http://niwimugosaz.onlinewebshop.net/tavutozisefab.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_off0000e78e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE78E 5044 bytes
SHA-256: 9c23fc5e46a2629d8b81ab142ab01799ab7233109ce9dcfb529826e1ddc7d5be
font_01_sfnt_off0000f890.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF890 11540 bytes
SHA-256: e8b16c232c6c9c7601f0fa2a3ea9192aa8a6aefc1c76904923344388998e706a