Malicious PDF — malware analysis report

Static analysis result for SHA-256 31ef8e468ce881db…

MALICIOUS

PDF

85.3 KB Created: 2021-03-22 09:14:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3c3bdbf47c1231040c7cf1140770d581 SHA-1: 92f8734a512e54355461db58b8ed0fa24545647a SHA-256: 31ef8e468ce881dbcf84dc87d389ce55cdfd019a9e497876c1c74daeb09a5bb2
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://midufefew.ru/wix?keyword=brother+ce+4000+user+manual+maquina+de+costura PDF link annotation
    • https://cdn.sqhk.co/denobafopum/aU4lngd/88932717149.pdfIn PDF document text
    • https://cdn.sqhk.co/kupujape/iehfksQ/dragon_ball_z_mod_download.pdfIn PDF document text
    • http://lufijep.iblogger.org/how_do_you_put_gree_ac_on_heat_mode.pdfIn PDF document text
    • https://cdn.sqhk.co/boxepupovemu/cif7hfL/kekolokojamafumafu.pdfIn PDF document text
    • http://guwobedegaf.22web.org/osmosis_imdb_parents_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/nesuxozajek/hieEjAI/race_illegal_high_speed_3d_apk_data.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://winovewivigo.rf.gd/effects_of_teacher_absenteeism.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7dd0ee6-edba-4cda-8293-a05e1cee2846/68698957276.pdfIn PDF document text
    • http://nizosatonorola.rf.gd/introduction_to_electrodynamics_griffiths_4th_edition_solution_manual_free_download.pdfIn PDF document text
    • https://c8f6a2ed-bc8a-4fd4-b26a-19707db7c4cd.filesusr.com/ugd/1cc7e8_94d2e5642d704c06bdabb33b5969038e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/62c96863-0487-40c1-9520-275437ee30e9/vabarekamenofibi.pdfIn PDF document text
    • https://s3.amazonaws.com/mibiwivanetuj/49121357646.pdfIn PDF document text
    • https://b9a4c3d6-4ccf-4d04-9b0f-c2e9c357e15d.filesusr.com/ugd/e5cbe5_f4c752b63468478b87a764e2c31669f1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d42c85fe-8b63-4ffd-ac9f-4286c2edc99d/64429020273.pdfIn PDF document text
    • http://xaxelajifamukas.rf.gd/2018_acura_mdx_navigation_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/wutisigila/media_player_classic_for_windows.pdfIn PDF document text
    • https://s3.amazonaws.com/zesotat/conference_presentation_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/divikufifir/depogujituvix.pdfIn PDF document text
    • https://s3.amazonaws.com/nigimul/battlefield_1_trailer_video.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b94d4ff1-e14c-4b59-8876-80a307b3058a/zozixizudopewipule.pdfIn PDF document text
    • http://lukarimavelo.epizy.com/87242741069.pdfIn PDF document text
    • https://601bead5-a720-4f65-98db-62fe2a42cb91.filesusr.com/ugd/0e52b4_7ef874e6287b4c6d8064c49b94752241.pdf?index=trueIn PDF document text
    • https://9ebe8999-295a-4f11-87dc-c96f3e1b46ff.filesusr.com/ugd/8de238_9d65871766ba421fbc094b1fbf60980b.pdf?index=trueIn PDF document text
    • https://201a0bc5-0eb3-4135-8969-828875a6b07d.filesusr.com/ugd/607883_c5dd12e294b24977bba3b173ec2ffecb.pdf?index=trueIn 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_off00010da2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DA2 5584 bytes
SHA-256: d46ad8ffe13b77b28a96a56cdad58eab8f975635b78998f331b3c562ef9b8184
font_01_sfnt_off0001206f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1206F 11016 bytes
SHA-256: 85e4ec09bde9757a78ecc443c478eaeaa035961eade64b93602ef728bc992366

Open this report in the interactive analyzer, or submit your own file for analysis.