Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2dd3aff10c00bd0…

MALICIOUS

PDF

97.7 KB Created: 2021-03-14 04:42:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: afc29a02e2fe0ebeeb5082d5b87e9be1 SHA-1: 2d7143ce31c2975130cd5a8e43f2334fc6df9944 SHA-256: f2dd3aff10c00bd0cdd6459ca8e2bcd7cf73b8159ed245757aa6c14a6f6708bb
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by 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 0.9997

Heuristics 4

  • 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://maypoin.ru/strik?utm_term=program+management+office+structure PDF link annotation
    • http://stat-index-co.com/72085473276m1eim.pdfIn PDF document text
    • http://pitushok.space/versiculo_de_la_biblia_donde_pedro_camina_sobre_el_aguas8lku.pdfIn PDF document text
    • http://kamikofonem.mygamesonline.org/how_energy_efficient_is_an_electric_fireplace.pdfIn PDF document text
    • http://jipevuzugegusol.22web.org/chhaila_bihari_gana_ing.pdfIn PDF document text
    • http://kijekidajefi.getenjoyment.net/54251301796.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sodividupoz.epizy.com/which_obd2_scanner_software_for_laptop_is_best.pdfIn PDF document text
    • https://3485775d-af35-4505-8fb4-f6750f575e04.filesusr.com/ugd/42f18e_d5c3e766873b4c60bf53975fa48ad785.pdf?index=trueIn PDF document text
    • http://katezoluvezile.epizy.com/arcane_trickster_3._5_guide.pdfIn PDF document text
    • https://5c2df1de-05ea-4e17-9aa3-38adc7ce3153.filesusr.com/ugd/ddd609_bd7e79a5edcc47d995b00eb603fb9fbf.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/00d1194a-ac58-4e8f-8433-0e03b97459ac/2017_gx_460_towing_capacity.pdfIn PDF document text
    • http://jupilabezisetif.epizy.com/52807031810.pdfIn PDF document text
    • https://1f571a09-6495-4108-bd1a-9715deae29b5.filesusr.com/ugd/b0bf26_c8ea7d5ee37c45358648684c6c1f5d95.pdf?index=trueIn PDF document text
    • http://sirovorisolilu.rf.gd/why_does_my_pool_say_no_flow.pdfIn PDF document text
    • http://vipaviveza.epizy.com/ascaso_dream_manual.pdfIn PDF document text
    • https://5e9816b5-e261-4a84-a5c7-594b6999e1c8.filesusr.com/ugd/eb2f7d_e1cb1f01218e41d2886522a0e3f3de48.pdf?index=trueIn PDF document text
    • http://vekemelegewimo.atwebpages.com/79817120468.pdfIn PDF document text
    • http://topuwagib.epizy.com/billian_billian_3d_song.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8928013d-557b-434d-9b47-5fb0e448469d/17000584534.pdfIn PDF document text
    • http://gemawinikifiv.myartsonline.com/75169824378.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76378ed6-9a92-4ce9-af3f-8bd29ef6a7af/zaxbys_job_application.pdfIn PDF document text
    • http://bividit.rf.gd/transformers_revenge_of_the_fallen_autobots_list.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_off0001425b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1425B 5168 bytes
SHA-256: cfe19f4b8e3bbd5d7c31084d4a31d646a8ecefdf6ab9650b1d2883215185a4d9
font_01_sfnt_off000153df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x153DF 11120 bytes
SHA-256: a5d2df993ac3f0deaed543e80f4364cd814523320768f45e8f54c8bc3bd731a8

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