Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b910d7d79aa5332…

MALICIOUS

PDF

90.9 KB Created: 2021-03-29 18:48:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 456e8187e490881b6fd3d6a2e8345b0f SHA-1: fb6566dfec05d8a50ee1dc4c20025ad3d871fdb7 SHA-256: 0b910d7d79aa53324bcc80e1b521f09bde432df0dba01b38cd23da06148de38c
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable hosting or domains associated with link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of techniques used to redirect users to malicious sites, likely for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9925

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://ponafet.ru/award?keyword=catalogo+andrea+ropa+2020+pdf PDF link annotation
    • http://pazifelurup.medianewsonline.com/caballo_de_troya_original.pdfIn PDF document text
    • https://cdn.sqhk.co/ratufewebu/gifFhbu/harvard_business_review_case_studies_free.pdfIn PDF document text
    • https://tekegalesi.weebly.com/uploads/1/3/0/7/130740489/kexetadimoteli.pdfIn PDF document text
    • https://cdn.sqhk.co/jasurisunav/jh2jjXN/54799644843.pdfIn PDF document text
    • http://zemesod.getenjoyment.net/cost_accounting_notes_for_b._com_2nd_year.pdfIn PDF document text
    • http://lebuvowune.getenjoyment.net/how_to_activate_iphone_without_sim_card_no_wifi_no_itunes.pdfIn PDF document text
    • http://kalukawuwo.mygamesonline.org/vias_de_administrao_de_medicamentos_em_pediatria.pdfIn PDF document text
    • https://cdn.sqhk.co/kesumixom/hCpdhg5/1801723877.pdfIn PDF document text
    • https://cdn.sqhk.co/sokodajep/cFiaJjg/candy_smash_mania_mod_apk.pdfIn PDF document text
    • http://lubevos.scienceontheweb.net/telijonatawurumifapave.pdfIn PDF document text
    • https://nukoxola.weebly.com/uploads/1/3/1/3/131380146/c85b48487153a.pdfIn PDF document text
    • http://larekew.mywebcommunity.org/84289019588.pdfIn PDF document text
    • https://wopokajam.weebly.com/uploads/1/3/0/8/130874492/jululipibadi-sedadivowopajag-nabukasis.pdfIn PDF document text
    • https://cdn.sqhk.co/zukasedu/gjAvYnj/kinaf.pdfIn PDF document text
    • https://vazanekufom.weebly.com/uploads/1/3/5/3/135322674/8f40a0bdd0dc0.pdfIn PDF document text
    • http://timujisifatex.22web.org/58131392723.pdfIn PDF document text
    • http://zakewabo.scienceontheweb.net/casio_collection_mens_watch_w-735h.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vetoraj.rf.gd/nagogu.pdfIn PDF document text
    • http://vekisofekibote.myartsonline.com/albumina_humana_grifols_bula.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5eb382a3-d6c8-43de-bfe7-e52f65d37658/gym_jones_operator_fitness.pdfIn PDF document text
    • http://dulubuli.rf.gd/86035146005.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/178c96ef-dea6-49d4-8a0e-e597e0f5aca8/my_nest_thermostat_says_no_power_to_rc_wire.pdfIn PDF document text
    • http://koxigumom.onlinewebshop.net/45442159616.pdfIn PDF document text
    • http://bepolujogox.atwebpages.com/holmes_lifelong_tower_air_purifier_with_hepa_hap1201-tu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0cc5b2a-387d-440d-a459-92b593c29dae/how_to_reset_samsung_galaxy_tab_a_if_you_forgot_password.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83ab46ab-0df3-4e36-93a0-26ff22c254f7/adobe_illustrator_classroom_in_a_book_2020.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
    • 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_off0000f941.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF941 5212 bytes
SHA-256: 826a126698bec978336e2f3710ab8ac08a65ef4a5ac50a1be1eeff45f0dba51c
font_01_sfnt_off00010afd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AFD 5544 bytes
SHA-256: 254c274e4759e3c9a0b02fc65b783b3c127d62f107af8a160a0c6ae19091d827
font_02_sfnt_off00011eb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EB4 12196 bytes
SHA-256: f0fa8e9a581fddb25874a582f05ed06a0dda007e9e6c8fc15c86be8d9726612f
font_03_sfnt_off000145b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145B2 16324 bytes
SHA-256: 061c07d981b8f8990ff64d8ffcc0dfdd8293d1fa186a2161f76b323ec7e8ce47

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