Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1dc8521f164b8e6…

MALICIOUS

PDF

75.1 KB Created: 2021-01-14 23:14:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 10cded9f9d67a0c96ba3510ffee75794 SHA-1: 1821f1d3726bedb563a25aefd877250dae079645 SHA-256: f1dc8521f164b8e636fec26ae7055951a697d00964c3e2848f45795d7f9b9aef
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 'ggtraff.ru'. The document body, though heavily obfuscated, contains text related to 'Phd in entrepreneurship and innovation usa', suggesting a phishing or social engineering lure. The ML classifier and ClamAV detection further confirm the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ggtraff.ru/123?utm_term=phd+in+entrepreneurship+and+innovation+usa In PDF document text
    • https://site-1176758.mozfiles.com/files/1176758/dominoes_rules_double_9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379483/normal_5fabf945db5b1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4394061/normal_5febf10298808.pdfIn PDF document text
    • https://site-1175435.mozfiles.com/files/1175435/90577460550.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378830/normal_5f97ea11e3745.pdfIn PDF document text
    • https://site-1184137.mozfiles.com/files/1184137/ditijuxixonekivudizinul.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
    • https://s3.amazonaws.com/wixamupelinere/ashrae_hvac.pdfIn PDF document text
    • https://s3.amazonaws.com/vokeri/livro_capites_do_brasil.pdfIn PDF document text
    • https://s3.amazonaws.com/lonozote/ca_dmv_form_dl_44.pdfIn PDF document text
    • https://s3.amazonaws.com/jimugivos/best_worship_songs_mix_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/nolarifaforuxop/android_5._1_1_lollipop_zip_file.pdfIn PDF document text
    • https://s3.amazonaws.com/nilafafakem/kotumutukobevezafex.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_off0000dddd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDDD 4960 bytes
SHA-256: c1e2c340b23317ac91a45e2c300d5a4610342987e14162a953804aeb3f9e00af
font_01_sfnt_off0000eea8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA8 10360 bytes
SHA-256: 244eb3a942200650938366a2cbc0167c2778c61dbf663f024e01db1faa989b2a
font_02_sfnt_off0001119b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1119B 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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