Malicious PDF — malware analysis report

Static analysis result for SHA-256 666d72d027281873…

MALICIOUS

PDF

76.5 KB Created: 2021-03-28 01:00:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: dbf73409c174ece688081d77271a3a40 SHA-1: 97facd289526ec7dac0970646664174887bb356d SHA-256: 666d72d027281873f2a9ed59e7e6194727aaac31e4a682d55c6a8cc51d2a9e25
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://crophysi.ru/strik?utm_term=can+you+wash+cosco+high+chair'. This indicates the document's primary purpose is to lure the user to this malicious site. The ML classifier and ClamAV detection further support its malicious nature. No scripts were extracted, but the embedded URL is sufficient evidence of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://crophysi.ru/strik?utm_term=can+you+wash+cosco+high+chair In PDF document text
    • https://static.s123-cdn-static.com/uploads/4372721/normal_5ffe91f6c2a11.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493589/normal_5fecf83156493.pdfIn PDF document text
    • http://sarilaruzez.iblogger.org/what_are_some_good_brain_teasers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446925/normal_601e59ff1326c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403960/normal_604dd6076449a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423431/normal_6021d178c23a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421623/normal_601672642e57a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486356/normal_604cbde150732.pdfIn PDF document text
    • http://mowopuxufifug.22web.org/calculus_early_transcendentals_2nd_edition.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470679/normal_5ff0a4ba6a73e.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vabedafozo/24272436451.pdfIn PDF document text
    • http://vuzinibijabu.rf.gd/email_attachment_google_drive.pdfIn PDF document text
    • https://s3.amazonaws.com/jupudizadid/82608260950.pdfIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/water_borne_diseases_ppt_template.pdfIn PDF document text
    • https://s3.amazonaws.com/kijelopazekune/lodge_cast_iron_dutch_oven_recipes.pdfIn PDF document text
    • https://s3.amazonaws.com/wewuxuviwar/50774499318.pdfIn PDF document text
    • https://s3.amazonaws.com/mokixetat/bahubali_movie_tamil_isaimini.pdfIn PDF document text
    • http://luzafofefo.rf.gd/kerigexodinulobosufa.pdfIn PDF document text
    • https://s3.amazonaws.com/xozeb/cardiomegaly_causes.pdfIn PDF document text
    • http://dudufimapu.epizy.com/larry_wheels_deadlift_program.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubatebedoxez/tiziz.pdfIn PDF document text
    • http://xazibubemefejo.epizy.com/how_lord_of_the_flies_end.pdfIn PDF document text
    • https://s3.amazonaws.com/fekife/rupasufijorupivitibonal.pdfIn PDF document text
    • http://xuramilipadig.rf.gd/rufisovozirosagumese.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_off0000e683.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE683 1560 bytes
SHA-256: c7b634934c831a90793e1a61e91011b2d2a0885e77f8cc03b6a378fabd1db9d8
font_01_sfnt_off0000ee75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE75 5128 bytes
SHA-256: b4c64187f2ee789fd00e7fc018f62c1b22ae56220b73f89c81962c3aed3f1d76
font_02_sfnt_off0000fff9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFF9 10196 bytes
SHA-256: 9ef538050c763fcbc16cdb1b101a4913f4c20772a42b38a061ed9ddde01fcaac

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