Malicious PDF — malware analysis report

Static analysis result for SHA-256 53df822227b3e23a…

MALICIOUS

PDF

77.4 KB Created: 2021-01-14 06:40:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: ee091b2b9c1cbdc47dec1275dd4d9d64 SHA-1: e6915ff9bef7d1db2a2e35be01cb6a132de05bcb SHA-256: 53df822227b3e23a289ca14b29bdf283b13850639a83b309c092cd5363e8a289
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://gettraff.ru/123?utm_term=eladio+dieste+church'. This, combined with a high ML classifier score and ClamAV detection, strongly indicates a malicious intent, likely phishing or malware delivery. No scripts were extracted, but the embedded URL is the primary indicator of compromise.

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
  • 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://gettraff.ru/123?utm_term=eladio+dieste+church In PDF document text
    • https://static.s123-cdn-static.com/uploads/4380210/normal_5fe2b4336e0a7.pdfIn PDF document text
    • https://site-1177029.mozfiles.com/files/1177029/gifudagapujagoxemovirikof.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458390/normal_5feef0234bd09.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381320/normal_5fc9a4916b4a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388824/normal_5fa72ccd4bf62.pdfIn PDF document text
    • https://site-1222001.mozfiles.com/files/1222001/assassin_s_creed_unity_android_apk.pdfIn PDF document text
    • https://site-1173632.mozfiles.com/files/1173632/31767449247.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365638/normal_5f88836c58cdb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403131/normal_5ffd1d57b683c.pdfIn PDF document text
    • https://site-1172346.mozfiles.com/files/1172346/nivibazigunutibumoxibo.pdfIn PDF document text
    • https://site-1178351.mozfiles.com/files/1178351/98921829028.pdfIn PDF document text
    • https://site-1178845.mozfiles.com/files/1178845/tudodefelagunu.pdfIn PDF document text
    • https://site-1175626.mozfiles.com/files/1175626/kowosu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ddc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDC6 4984 bytes
SHA-256: 9862e3d3bb45a94ea27fc5d5fea8c0385845b16ec994567ed799ec29d9dff361
font_01_sfnt_off0000eeae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEAE 11328 bytes
SHA-256: dc0518906b4da58dea294f054f931c2b13dc30e6bba39832f9bbb14061fc8978
font_02_sfnt_off0001143f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1143F 16068 bytes
SHA-256: b09879be15c6eb2246ae7b48c1c275502bdacda3194b2e7a150da035b49823e9

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