Malicious PDF — malware analysis report

Static analysis result for SHA-256 73607a2f36ca5fd8…

MALICIOUS

PDF

66.6 KB Created: 2021-03-26 10:10:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 6b94479d384b755f24c5a91ec6296b58 SHA-1: 6147b2ddc749f035af084059cf230758be6b5256 SHA-256: 73607a2f36ca5fd85e928a732591519ac81dcacb64f57b475c896ea2f87a0d04
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded URL, disguised as a search result, suggests a phishing or social engineering attack aimed at tricking users into downloading further malicious content. No scripts were extracted, but the PDF structure itself contains the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://ponafet.ru/wix?keyword=integrated+korean+workbook+1+answers+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4451220/normal_5fee1414a82ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368471/normal_6043eede42e13.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369334/normal_5fd61e3033341.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404514/normal_5fe12c8077b94.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374203/normal_605abd25c65f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449184/normal_6032c66eb57d6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416504/normal_5ff6beaee9118.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451206/normal_601396f98851c.pdfIn PDF document text
    • https://cdn.sqhk.co/remigalakefo/9hhMiip/begawejaguvezazofegew.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409254/normal_5fef428edd639.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377679/normal_5fe2d4b0989b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378857/normal_5fe6ccc07c78a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374369/normal_6041eb911f35e.pdfIn PDF document text
    • https://cdn.sqhk.co/xinefegepe/4m0icjc/balenciaga_bag_mini_strap.pdfIn PDF document text
    • https://cdn.sqhk.co/pixefavenar/hOjgVdY/69031882245.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454559/normal_605a5cc7af664.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/d7c371ec-73b2-4061-818d-735134c9d80c/73327721786.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12080137-7d0d-4fba-b33b-3d5a560452bf/19480448483.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5cd22a7-f8e6-4208-93b1-dff81c4d8a3f/10024273577.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbc93827-dcbc-4a7e-ad66-8c2bb713bb54/how_to_start_love_talk_with_a_girl.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cb21e7f-58d9-468b-83bb-cd1deb5fed26/89804124617.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_off0000c95a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC95A 5280 bytes
SHA-256: cb35554b8bb35bc3d41a4bfd7c7bb62817540e90fe57e526f3251ce0104120c5
font_01_sfnt_off0000db72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB72 9812 bytes
SHA-256: f67dc150d0126914f053309c6d5506abb8e81815089d116ef180ce6a4afd1d90

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