Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cb9bc0a2b59735e…

MALICIOUS

PDF

88.0 KB Created: 2021-04-01 06:29:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 72e002d709d26de55f063adcc4533b2a SHA-1: f4939ccc7903d8061d4dd5d8651131f953976871 SHA-256: 0cb9bc0a2b59735e4bcd3532785ff2c30371b973e2a186770c19897cc6e737e6
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a large number of external links, suggesting a link farm or SEO manipulation tactic. One of the primary URLs extracted, 'https://golowaki.ru/wix?keyword=wii+sports+resorts+island+flyover', appears to be the main lure. While no scripts were explicitly extracted, the PDF structure and the nature of the heuristics suggest potential for embedded malicious JavaScript or exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://golowaki.ru/wix?keyword=wii+sports+resorts+island+flyover PDF link annotation
    • http://julaximufe.66ghz.com/btinternet_email_server_settings_android.pdfIn PDF document text
    • https://zizusufake.weebly.com/uploads/1/3/4/6/134646877/3aa64072f0814.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459477/normal_601095d6cffe1.pdfIn PDF document text
    • https://fojevatiseme.weebly.com/uploads/1/3/4/4/134400043/0b2b9a2cf8c456.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380384/normal_60613c28dbc64.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479454/normal_603685aa804cf.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/tazopaju/afrikaanse_christelike_musiek.pdfIn PDF document text
    • https://s3.amazonaws.com/gomaxod/how_to_make_a_write_up_report.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/88805610053.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b5690b7-b830-4425-b85b-ae1de57cfdbb/how_to_pronounce_jojo_moyes.pdfIn PDF document text
    • https://s3.amazonaws.com/rerinago/whatsapp_para_windows_vista.pdfIn PDF document text
    • https://s3.amazonaws.com/rakabexozu/60873813037.pdfIn PDF document text
    • http://tumatubipebopu.epizy.com/bengali_e_calendar_1426_download.pdfIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/folefitewe.pdfIn PDF document text
    • https://s3.amazonaws.com/vibasujefir/1983_honda_shadow_750_service_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/xopugup/kuribevepefupif.pdfIn PDF document text
    • https://s3.amazonaws.com/zuponefi/nufilonek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3a7a65b-4454-4908-9671-9ddb6105fe33/understanding_the_purpose_and_power_of_prayer_myles_munroe_free_download.pdfIn PDF document text
    • http://bofoguvixevijin.epizy.com/45169576172.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_off00011bbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BBC 5208 bytes
SHA-256: 80a55ab8a7b82a08f7579fd40738cf85d7920538ee74c49f67823e9e2018f7d2
font_01_sfnt_off00012d9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D9A 10940 bytes
SHA-256: 080b9c8d0f46e8f795cf8aeb5672300230e0cda60e4c362bbc44c8d254c48805

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