Malicious PDF — malware analysis report

Static analysis result for SHA-256 60b787500fb0823d…

MALICIOUS

PDF

86.8 KB Created: 2021-04-30 17:12:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 7b9a0a578707eb782b9153e3f6eedaf1 SHA-1: 3a0c6d6d3f7e9f28eb048c2a7b0946cc2644e7e9 SHA-256: 60b787500fb0823d32c14f3e47aca6b079110ebf0c36f14c1be8ca6f096e95d1
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://yafferge.ru/strik?utm_term=what+is+an+example+of+reflective+listening'. The document body, though heavily obfuscated, contains text related to 'reflective listening' and the authoring application 'wkhtmltopdf', suggesting a phishing or social engineering lure. The ML classifier and ClamAV detection further confirm the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://yafferge.ru/strik?utm_term=what+is+an+example+of+reflective+listening In PDF document text
    • https://cdn-cms.f-static.net/uploads/4424331/normal_6056ca3429c82.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403128/normal_60370e8ee94d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409239/normal_605f9b8ab9fc0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414339/normal_60333f8e0ef81.pdfIn PDF document text
    • http://bopokijik.iblogger.org/foam_sheet_means_in_english.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393183/normal_5fd07bef8ab20.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/d4f9a641-b692-45f0-9f9d-620ac5c2dd6b/saeco_coffee_machines_harvey_norman.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c03231c-ea92-4773-b26a-b0fa1c2ad259/download_optiplex_390_network_drivers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa0eb87f-ba5b-4ad3-9cfa-5e1fa1360673/tokyo_ghoul_series_list_in_order.pdfIn PDF document text
    • https://s3.amazonaws.com/paxuvagal/rexisilinas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/430f0c23-2083-4862-9358-016d6437ca1e/65629973123.pdfIn PDF document text
    • https://s3.amazonaws.com/potamotaz/1379401709.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3156b8fd-103b-4f43-8a7e-97145ff85c0c/40605573599.pdfIn PDF document text
    • https://s3.amazonaws.com/zesotat/hiatal_hernia_patient_information.pdfIn PDF document text
    • https://s3.amazonaws.com/tobaziw/introduction_to_languages_and_the_theory_of_computation_solutions_chapter_3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/beaa63fd-5218-4232-8f78-ffc379a5b276/how_do_you_remove_a_grohe_faucet_cartridge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ca1411c-45e3-4823-a2d9-4e2f41b566b1/69514635936.pdfIn PDF document text
    • https://s3.amazonaws.com/nilafafakem/rutaleverejuligoduvoleru.pdfIn PDF document text
    • https://s3.amazonaws.com/vinejivunitego/ganidelogepuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f90a9aad-a706-4960-ac6f-c5ff9862d174/bowelujobezifozubajox.pdfIn PDF document text
    • https://s3.amazonaws.com/lulelepese/the_volume_on_my_directv_remote_wont_work.pdfIn PDF document text
    • https://s3.amazonaws.com/jewizopukuni/58982724530.pdfIn PDF document text
    • http://lakumufo.epizy.com/ctet_december_2020_notification.pdfIn PDF document text
    • http://tijivetax.epizy.com/85810982047.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_off000115c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115C5 5572 bytes
SHA-256: bda5fc9d3ae173f5a59812be776c711bd136aa2e83f4149440af151373ba96a4
font_01_sfnt_off000128a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128A3 10596 bytes
SHA-256: 0dd9eebface5b321723a1c13bc3f4ae9d5c7d88b3eb558350cddf16c63aaaa5b

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