Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d1a8e3d7ec9621a…

MALICIOUS

PDF

74.1 KB Created: 2021-03-04 00:56:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 68a1cdfb3932ad07d56fcbcdfc67ee2a SHA-1: 03d09772e9b898e58d170e11d76cdf6c2ad83add SHA-256: 1d1a8e3d7ec9621abe1478d57440b711fa85c48435a6ad400d32fec995cbc9a0
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1059.007 JavaScript

This PDF file was flagged as malicious by a machine learning classifier and ClamAV. The 'SE_CLICKFIX' heuristic indicates that the document likely attempts social engineering by instructing the user to press Win+R or paste a command into a terminal, a common tactic to bypass macro restrictions and execute malicious commands. The embedded URL 'https://pelibifir.ru/aws?utm_term=how+to+make+logitech+k800+keyboard+discoverable' suggests a lure related to device discoverability, potentially to disguise a malicious download or execution prompt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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/aws?utm_term=how+to+make+logitech+k800+keyboard+discoverable PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4386839/normal_603b3aa74b44c.pdfIn PDF document text
    • http://vulufinagi.mypressonline.com/dubuguvorolusivetigigene.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390055/normal_6007c466f0774.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497081/normal_6012db6a4e7d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385417/normal_5fda7a1dd6951.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407070/normal_5fefecead48f4.pdfIn PDF document text
    • https://cdn.sqhk.co/jawubibegeba/jgvOLK7/motorsport_manager_mobile_3_apkpure.pdfIn PDF document text
    • http://insurancesouk.com/delete_google_maps_search_history_ipadx11y1.pdfIn PDF document text
    • https://cdn.sqhk.co/zesonixiv/djdhigf/kafuzu.pdfIn PDF document text
    • https://cdn.sqhk.co/rubovadu/riehgjc/download_aplikasi_grid_photo_maker_for_instagram.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369911/normal_6021e84d101d3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://faxiruvud.myartsonline.com/23949209958.pdfIn PDF document text
    • https://s3.amazonaws.com/gekixadonuru/74996281520.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5AA 5788 bytes
SHA-256: 88f6b3f52a421c1f2942aaffeb6cc864e81b8217cea399d7d4848501aaba3bb3
font_01_sfnt_off0000e96d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE96D 10440 bytes
SHA-256: 16150c36c976c5be324f0495a14e939b8b599f8e1d82c90494ded2eedec6d0bf
font_02_sfnt_off00010d00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D00 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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