Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8c38f8262b3c265…

MALICIOUS

PDF

90.4 KB Created: 2021-04-13 22:28:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 6ce57498cbc5e6043c7b23dcb5700be9 SHA-1: 745fe0aa9a2b5652ee1d6dc47d6d579e31152f32 SHA-256: e8c38f8262b3c265b0be0393c4617369ad8c74f757d278c1dc82d3e8d0fbce71
156 Risk Score

Malware Insights

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

The PDF contains a heuristic indicating it is a link farm, with one prominent external URI pointing to 'https://xezojetit.ru/strik?utm_term=how+to+reset+carrier+mini+split'. ClamAV also detected this file as 'Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0', strongly suggesting a phishing or scam campaign. The document body, though heavily obfuscated, contains text related to 'reset carrier mini split', aligning with the URL's theme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://xezojetit.ru/strik?utm_term=how+to+reset+carrier+mini+split PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367947/normal_6027f2c22af34.pdfIn PDF document text
    • https://cdn.sqhk.co/sebuwemid/hhkPgj1/fingerprint_app_lock_for_android_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvexajamu/jbbSiev/take_off_flight_simulator_mod_apk_obb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470821/normal_605424619ce21.pdfIn PDF document text
    • https://cdn.sqhk.co/sofilita/lNiaSMF/doodle_alchemy_animals_online.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383692/normal_6008fd4e8c7a4.pdfIn PDF document text
    • https://cdn.sqhk.co/wazafanez/ClibERd/68733798932.pdfIn PDF document text
    • https://cdn.sqhk.co/tutabalero/L8zsij2/sakagipabenopav.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465719/normal_603bf6bf4318d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500186/normal_5fe262ed037c7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8dfd47f4-e591-4377-92a3-bdbf91d41e5a.filesusr.com/ugd/a58b01_76afd56a8f4341b9a3a2018b9aee7de8.pdf?index=trueIn PDF document text
    • https://45180a89-8b92-4d54-a4c6-cdf0ad6af3c7.filesusr.com/ugd/2b98a3_5a02c640d5c8429c9594e18fb2de0fc3.pdf?index=trueIn PDF document text
    • https://5b0e1d79-1acc-45ba-a965-31015372eee8.filesusr.com/ugd/67f5f7_0e6a37d100f54ddf827f8676e30262ad.pdf?index=trueIn PDF document text
    • https://51fd5013-30c4-43d1-89ce-86564632a3b5.filesusr.com/ugd/9f06f8_78bddc2dee144552aed4bddb8a87c643.pdf?index=trueIn PDF document text
    • https://1e16da7b-5b4f-4122-a3c4-5c88c9d97cf7.filesusr.com/ugd/83f04e_ee2128d061fb45dca8a9f65ed13f8024.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zafirawit/black_and_decker_digital_toaster_oven_air_fryer.pdfIn PDF document text
    • https://s3.amazonaws.com/xapidajovaji/vcruntime140._dll_free_64_bit_windows_7.pdfIn PDF document text
    • https://s3.amazonaws.com/bededuxotulapil/bixovolugodudixidagoxojo.pdfIn PDF document text
    • https://43a2ba88-5de9-465b-b95f-6a4d82f2d06e.filesusr.com/ugd/dcbeda_30a67c20c27046d59c9ebb4eab85951d.pdf?index=trueIn PDF document text
    • https://d321836a-1bf8-47c4-b4d3-67fe1e7f0250.filesusr.com/ugd/33ab24_2cd608cfe1b44cc18a75e37547e970e6.pdf?index=trueIn PDF document text
    • https://01dc7cc6-b8ed-446e-8cc8-1ad78882ed38.filesusr.com/ugd/e23fbb_ac9313396a484e4189ed8c8536dfe1a1.pdf?index=trueIn PDF document text
    • https://584abdf6-e408-48d3-a53c-4313a8f82471.filesusr.com/ugd/18ee90_ba3d385f23974bbcbc97e92a19499567.pdf?index=trueIn PDF document text
    • https://14535e1a-360a-4d01-a655-fa33e115c80e.filesusr.com/ugd/b222ea_f4f2123c1d68420893e3dd5a6217a970.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bulozor/masituredag.pdfIn PDF document text
    • https://s3.amazonaws.com/tufujifinobiro/bunoxovabuwomo.pdfIn PDF document text
    • https://s3.amazonaws.com/lakadutof/68962014734.pdfIn PDF document text
    • https://s3.amazonaws.com/xonaxevetaf/carousel_cake_template.pdfIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/resetting_dell_inspiron_to_factory_settings.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/badnam_punjabi_song_whatsapp_status_video.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_off00012375.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12375 5132 bytes
SHA-256: 9ad2695d3d0dc9474aac1d4e2be4f416cb4bde6ba8b54712624d44071d4baf4a
font_01_sfnt_off000134e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134E4 11260 bytes
SHA-256: 202f8c46b687518b204857cf67ae889ef1597fbbd7fcfbff7930ec14816c7e77

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