Malicious PDF — malware analysis report

Static analysis result for SHA-256 24967b0e9da1933e…

MALICIOUS

PDF

121.5 KB Created: 2021-03-12 04:40:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 0dc7a8b3f78ff09f3dc59b65c3e00588 SHA-1: 776224f85176b6dbbb11f1cd742e8fd369a97653 SHA-256: 24967b0e9da1933e07ef610c4a3d6d9dd5dea895d4e0b8f9902992e5694ede21
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one prominent URL pointing to a suspicious domain that is likely used for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://gimoguvi.ru/wix?keyword=maplesaga+warrior+training+guide PDF link annotation
    • https://cdn.sqhk.co/puruwedisuma/fCJjiie/dreamers_store_hillsboro.pdfIn PDF document text
    • http://sberin.xyz/nice_guidelines_for_copd_exacerbationw6rpt.pdfIn PDF document text
    • https://cdn.sqhk.co/bikegola/iiDkjhn/rofefatinetukezetewow.pdfIn PDF document text
    • https://cdn.sqhk.co/tivanosox/djfB0he/relul.pdfIn PDF document text
    • http://dejepuzalew.mygamesonline.org/why_will_my_samsung_tv_not_connect_to_internet.pdfIn PDF document text
    • http://gilumesu.mypressonline.com/baltimore_catechism_3.pdfIn PDF document text
    • http://copyrightreports.com/how_do_i_get_an_emergency_doctors_appointmentxwqqv.pdfIn PDF document text
    • http://zefujixa.mywebcommunity.org/banco_popular_de_puerto_rico_das_feriados_2020.pdfIn PDF document text
    • http://afracheat8.xyz/3734997213zecl2.pdfIn PDF document text
    • http://tryraisins.pro/rcbs_chargemaster_1500_combo_for_saleyei2e.pdfIn PDF document text
    • https://cdn.sqhk.co/kejofuvata/Ziegcfn/85832108151.pdfIn PDF document text
    • http://toolsbestpricemicrometer.site/flowers_in_the_attic_1987_script4aw7n.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/bejideba/elements_of_news_reporting.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a4eb57d-2d63-4925-9209-007b76a5cf82/xoboji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14acc737-b6b6-4dca-b4aa-1822e8a95b90/fresh_mechanical_engineer_jobs_in_oil_and_gas.pdfIn PDF document text
    • https://c78267de-509c-4cb0-9394-6b21b7876e04.filesusr.com/ugd/290ce3_58e46fec915e4cf2a103025ff76a342c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zufojadibi/formal_language_and_automata_theory_textbook.pdfIn PDF document text
    • https://1416a32c-f91c-4ec3-9c10-bfdf610c7df7.filesusr.com/ugd/76de1a_03ccdc46b6994b3081f02643047d10e7.pdf?index=trueIn PDF document text
    • http://lexekuduwowig.atwebpages.com/eau_guidelines_prostate_cancer.pdfIn PDF document text
    • https://48e4e0df-78ce-4736-8797-27735e68dc67.filesusr.com/ugd/f3b179_7623a359fe1d4cf6bccf3ea2a5a9930f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3389e273-c56d-4dd4-aafa-901bdd376c8f/6879620880.pdfIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/zofulel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bdc4b56-051c-424a-a06b-bfb06fb6e1d1/how_to_attach_a_dishwasher_to_a_garbage_disposal.pdfIn PDF document text
    • https://s3.amazonaws.com/tinivukedeta/how_to_use_layers_in_photoshop_elements_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/voxipanovigepiv/barfi_full_movie_free_in_tamil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75908030-8988-41b5-b386-763759f35430/jifamikixebotuzojadapi.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_off0001a0fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A0FA 5224 bytes
SHA-256: 9f21feb399a1683542c7631e7d293574214fe471c8fa105fb3eab14bffda67ca
font_01_sfnt_off0001b2e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B2E6 10736 bytes
SHA-256: b7c6acda0fb7a6c030e5e886b336593a6bee044056ec17654db3496e03a97125