Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc3be2449bf39f6a…

MALICIOUS

PDF

88.6 KB Created: 2021-04-05 08:01:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 0e6a3c2eceb12b6d1ac4959e7102ee1e SHA-1: 0c9ac5cdb28fafc35a04dc6b2ce64e701d5df792 SHA-256: bc3be2449bf39f6afa71d4270bc670b3f88c0a5b2ebda05a620338ed948e6543
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, indicative of a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://leonvi.ru/wix?keyword=how+to+pair+corsair+void+wireless PDF link annotation
    • http://tublitalia.fun/where_can_i_get_my_rabbit_neutered_for_freemckm6.pdfIn PDF document text
    • http://mscgis.net/what_kind_of_oil_for_briggs_and_stratton_snowblower3wqaw.pdfIn PDF document text
    • http://trells.space/kunofarelefan9fj28.pdfIn PDF document text
    • http://rewita.fun/94014153058pycjh.pdfIn PDF document text
    • http://shopsmmv.site/minecraft_stoneblock_guidej6243.pdfIn PDF document text
    • https://cdn.sqhk.co/rexixugepir/jghhdie/bowmasters_mod_apk_android_oyun_club.pdfIn PDF document text
    • http://trafikcezaodebayisi.com/waiting_for_the_barbarians_j._m._coetzee_summaryowbfm.pdfIn PDF document text
    • http://xbet1.fun/63401907453ufm1z.pdfIn PDF document text
    • https://cdn.sqhk.co/fuludasowipu/hNogh0R/17673029432.pdfIn PDF document text
    • http://erogan-columbia.site/the_shining_carpet_face_mask_ukh1lkn.pdfIn PDF document text
    • http://reduslim-eu.site/vijojagagesifijopigudoe5vxr.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/ruzumeb/91276683645.pdfIn PDF document text
    • http://mubufelijora.epizy.com/autonics_temperature_controller_tk4s_manual.pdfIn PDF document text
    • http://wobemiko.epizy.com/exercices_corrigs_rapprochement_bancaire.pdfIn PDF document text
    • https://s3.amazonaws.com/retisovojor/30123607011.pdfIn PDF document text
    • http://toduwez.epizy.com/kolajigani.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxalowafokuvo/what_is_audacity_means.pdfIn PDF document text
    • https://s3.amazonaws.com/jusagi/26363953135.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5172b8e-8e33-4bbb-9288-1bbf5529cdc0/what_is_the_summary_of_the_story_the_little_prince.pdfIn PDF document text
    • https://s3.amazonaws.com/debamijizozexo/overview_solids_liquids_and_gases_worksheet_answers.pdfIn PDF document text
    • http://lekukulefu.epizy.com/14707053298.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3196d53-993e-49f5-9062-58c53bf814b6/how_to_reset_clock_on_oster_microwave.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ec2ffdb-071c-4ba3-8425-69c64f0d36d2/bus_company_safety_ratings.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4B6 6440 bytes
SHA-256: 705377623a4c4344e02470fedf876d1ed6f0c7c0eac322cafb15afc9430d14bf
font_01_sfnt_off000104aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104AA 5180 bytes
SHA-256: 291ccf81c56c961a0a01ea3f31b3bc273b48b61692ab866913a554036444594a
font_02_sfnt_off00011667.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11667 12152 bytes
SHA-256: 51e0e4aa89d0dfbb034f40c2424205d994419c5c67fe1fe50e348396f553b1df
font_03_sfnt_off00013ea2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EA2 16204 bytes
SHA-256: 31aa257675234f953cb39254c73a0c002637764ec2691c470e0912636c3685cf