Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4b5d6b8d53a663f…

MALICIOUS

PDF

78.2 KB Created: 2021-06-13 14:16:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d933d5370fd4f589ea95462f6c48d73c SHA-1: ca2536d2d78ba40587e430021a21341e788f5e9c SHA-256: c4b5d6b8d53a663f4dd86c0fddde9fa3c1fe10b6d01c23295bde217f608a3bd7
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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://coretry.ru/pbw?utm_term=virginia+woolf+and+feminism PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4389074/normal_5ffe595d8b0d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367017/normal_603f535f5502e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411229/normal_5fd9d216d9d83.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491432/normal_600c79cbb11b9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404520/normal_5fc59c4f616ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381320/normal_5fd6e2e81b6ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391009/normal_60c1c6deb4d64.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384304/normal_60656b314ea93.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382779/normal_5fe676c92ab0a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500678/normal_60bf15feb93ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459175/normal_60222215cc3da.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/b2034c17-5e8c-44df-95f0-40df640f8698/pudatenujasosuketimefupu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e635f87-3e9d-437c-9c78-856ea83793b0/puxozupolubisewalala.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96fb4649-4ca1-4872-aa3f-cb8afd1b9010/28244507475.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e01d090-76dd-42a4-a934-1dbbe91e89f1/kekerajevunize.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88a86dc0-7959-4689-888a-3f1b2e329b88/bikuki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2b6f5c6-98e4-423d-9223-c1acccebc12d/harbor_breeze_merrimack_ii_52-in_matte_bronze_led_indoor_outdoor_ceiling_fan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/311d089e-5e57-404b-9eb5-14c68d3fcba9/eureka_forbes_vacuum_cleaner_service_centre_in_coimbatore.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10a8e91d-a017-45d7-8565-e36344ac5ca7/powermax_45_plasma_cutter_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5f51e90-57b2-4e5c-95c6-2b9d71424a16/braun_millennium_series_wheelchair_lift_troubleshooting.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec85ce0b-0095-4fef-8277-40fa7bc96441/pibugakigemigixiwuwofarik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d824e0ca-0e3d-4dc4-acfa-b63da70e179a/88569810170.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_off0000f1e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E1 5284 bytes
SHA-256: f7d7435661d6828bc0e42b51c476fd62ffd51933f1634a789da2ba164f162885
font_01_sfnt_off000103de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103DE 11412 bytes
SHA-256: f57cf84f3cd1c8c80db9ff60834ad573f77c7b0c3895275f3c096a32e966290f

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