Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ca8cdf733de9110…

MALICIOUS

PDF

76.8 KB Created: 2021-03-24 09:25:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: cea330b227869e2a6d6b1566c0d775a4 SHA-1: 5201bd63d2a61b812ef189759f94e70bf4203672 SHA-256: 0ca8cdf733de91106779755ec56e584675ba62ce35eb886b3c6649c7f34fc440
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, with the primary malicious URL being https://pelibifir.ru/wix?keyword=door+slammers+2+drag+racing+hack. ClamAV also detected this file as 'Pdf.Phishing.Trojan'. The presence of embedded URLs and the overall structure suggest a phishing or malicious redirection attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://pelibifir.ru/wix?keyword=door+slammers+2+drag+racing+hack PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4393900/normal_602379b316875.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451025/normal_6006b2c25a7ee.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf876ad3-3dbe-4bc1-bdb0-8d15494edb48/how_to_calculate_tenure_in_months_and_days_in_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/ritoma/after_anna_todd_vk.pdfIn PDF document text
    • https://cccd2283-d272-450a-840b-6541230ebad2.filesusr.com/ugd/5de1df_3a3404f8dec64e758b92e7721c9824ea.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wizitifowubux/pixoja.pdfIn PDF document text
    • https://s3.amazonaws.com/lijulijowivaze/cancer_information_in_english.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/3382231722.pdfIn PDF document text
    • https://s3.amazonaws.com/kexamoxusinixu/felilibonusom.pdfIn PDF document text
    • https://s3.amazonaws.com/savukojubusum/mudidadapojejis.pdfIn PDF document text
    • https://s3.amazonaws.com/tesotiwapax/biotecnologia_definicion.pdfIn PDF document text
    • https://s3.amazonaws.com/zalomi/irobot_roomba_model_655_battery.pdfIn PDF document text
    • https://1527c8d3-3321-4e9f-872f-e2bebb57bac2.filesusr.com/ugd/bf2d42_7d2669e743dc48029e0c8e98b107386f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/961d701b-b8f8-474a-8c3b-1591da8c0720/levazexetajobel.pdfIn PDF document text
    • https://s3.amazonaws.com/zikeko/did_you_hear_wtf_i_said_tiktok_song.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e145ba9-a40a-4f69-b12b-575257ba42a6/66955418948.pdfIn PDF document text
    • https://4e4301d6-cc9a-4939-960a-6b497c1efea6.filesusr.com/ugd/d78803_f0fd429272c94b47bdacbb2aeed21216.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nevowimo/kms_activator_office_2016_32_bit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/380b05bd-bf34-4c93-9475-ede79a348570/how_to_refill_ink_cartridge_canon_ip2770_continuous.pdfIn PDF document text
    • https://b615eccc-4413-4b1d-8109-ede925130a83.filesusr.com/ugd/0994f9_baf5beb2c1d0416b9843834427b35197.pdf?index=trueIn PDF document text
    • https://f8b2de7a-6012-4721-b8f1-df5267d6bb95.filesusr.com/ugd/8ebb60_d7b2351815a14f5b9f21a6f5c106beb6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wokesabisevo/whatsapp_video_tik_tok.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_off0000ed63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED63 5548 bytes
SHA-256: c4718aff922941f4ed2cff7bfc085adca5f40922b1cf2fe198c4916107b811bd
font_01_sfnt_off00010019.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10019 11240 bytes
SHA-256: 905a0594a389b14079418664aca47b2440b77548e3233d3149cd0da62bf242a4

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