Malicious PDF — malware analysis report

Static analysis result for SHA-256 74eeca964c1d4a9d…

MALICIOUS

PDF

77.8 KB Created: 2021-03-29 19:44:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 32da764a3becbe161e2016fd361063bd SHA-1: 71c898fafe02148c19a41ca7c3b7151616bac990 SHA-256: 74eeca964c1d4a9da61b561d8d6885cd9744a1f922d1c55157b3915fdef5d756
126 Risk Score

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 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dafemum.ru/123?utm_term=celtx+script+free PDF link annotation
    • http://reduslimitalia-oficial.site/xotej94p57.pdfIn PDF document text
    • http://xepidenad.scienceontheweb.net/8622153399.pdfIn PDF document text
    • http://derilezin.sportsontheweb.net/euro_truck_simulator_2_key_generator_v2.1.pdfIn PDF document text
    • http://getcabinets.xyz/appvalley_free_iosu2b90.pdfIn PDF document text
    • https://cdn.sqhk.co/tepikipo/t5zghja/pamodosibanomisivisenu.pdfIn PDF document text
    • http://guitar.su/wenajewunevaromomazazxx50.pdfIn PDF document text
    • http://devubowoku.mypressonline.com/jusunogosopobunusutumo.pdfIn PDF document text
    • http://gazupoz.sportsontheweb.net/carol_ann_duffy_selected_poems.pdfIn PDF document text
    • http://sikazigazes.mypressonline.com/augusto_csar_sandino.pdfIn PDF document text
    • https://cdn.sqhk.co/gojogefe/Aijji2S/boxoziwek.pdfIn PDF document text
    • https://cdn.sqhk.co/reretukida/gjidfc1/1320575014.pdfIn PDF document text
    • http://silujokiz.mypressonline.com/hello_goodbye_and_everything_in_between_free.pdfIn PDF document text
    • http://jakesubinosol.scienceontheweb.net/april_2020_current_affairs_gradeup.pdfIn PDF document text
    • http://devgm.design/rowurulc7xlx.pdfIn PDF document text
    • http://shoppermarket.online/ielts_writing_samples_band_9_simonhhgtc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://bef89f6e-6323-4b84-ad9d-a44490bfcc4f.filesusr.com/ugd/96768c_76f7784bef11465999ae3877e1cc70dc.pdf?index=trueIn PDF document text
    • https://e25b5f36-ee09-4010-8803-019b2853a23b.filesusr.com/ugd/c34eac_ccbe9168b0d646ea9961aa3b96401577.pdf?index=trueIn PDF document text
    • https://348ddb29-83e1-4812-94a1-743b72ef9b42.filesusr.com/ugd/23b571_d4e21242950c447b9c55cd7bcd9239cb.pdf?index=trueIn PDF document text
    • http://kimawawasero.onlinewebshop.net/electric_circuits_ninth_edition_solution_manual.pdfIn PDF document text
    • https://36fde204-cda4-4268-899b-58717f9005d0.filesusr.com/ugd/b13063_0e3d9be71669416fb889667f67a7515e.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC9C 4460 bytes
SHA-256: 9dc5949d2786449de5fe501cf118a989b047492d887bd7f145c5859b2dc49123
font_01_sfnt_off0000ebe0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE0 20100 bytes
SHA-256: c6c3ea8305a8601356ef2e090eb85e438353706912ef20b4792fe859e472839c
font_02_sfnt_off00011a1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A1B 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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