Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2e3e0a8d2b817e3…

MALICIOUS

PDF

75.0 KB Created: 2021-01-22 11:38:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: a9fe06b185235ce0c2e454bf8cef4f67 SHA-1: 8e20fc46a80b460f170734c328094a4c980b4acd SHA-256: d2e3e0a8d2b817e3ea0cd622ab57305c83a739752e63df0d285ba3528c6859f8
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a significant number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, pointing to various domains. One of these URLs, 'https://trafffi.ru/123?utm_term=bsf+romans+lesson+22+day+4', is flagged as an external URI. ClamAV also detected the file as 'Pdf.Phishing.Trojan'. The presence of numerous external links suggests an attempt to redirect users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://trafffi.ru/123?utm_term=bsf+romans+lesson+22+day+4 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4390068/normal_5fe5440de4e20.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480744/normal_5ff3173f6ee67.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365639/normal_60011a24ea94d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402948/normal_60070df86ef57.pdfIn PDF document text
    • http://nofosofeze.iblogger.org/gototraining_user_guide.pdfIn PDF document text
    • https://momigetufi.weebly.com/uploads/1/3/4/8/134876151/b0236f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413842/normal_5fdc3e85f1dd6.pdfIn PDF document text
    • https://muxajugukeso.weebly.com/uploads/1/3/1/4/131453177/5645252.pdfIn PDF document text
    • https://vowabogebem.weebly.com/uploads/1/3/0/7/130775978/eb6be4e6b7494e3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tiniruru/freemarker_email_template_spring_boot.pdfIn PDF document text
    • http://sozogakuvigoxev.epizy.com/kujuxoxaxuroxul.pdfIn PDF document text
    • http://matogojetize.rf.gd/telenet_tv_app.pdfIn PDF document text
    • http://davutawopoban.epizy.com/tv_buying_guide_singapore_2019.pdfIn PDF document text
    • http://kazaxese.epizy.com/99859691516.pdfIn PDF document text
    • http://gojaxuga.epizy.com/75682935589.pdfIn PDF document text
    • http://zesufes.epizy.com/alto_sax_sheet_music_christmas_songs.pdfIn PDF document text
    • http://xakosafejel.epizy.com/cazadores_de_microbios_capitulo_1.pdfIn PDF document text
    • http://meridupomosim.epizy.com/bopirupuxo.pdfIn PDF document text
    • https://s3.amazonaws.com/tibitexil/commoncoresheets_rounding_word_problems.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_off0000e95c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE95C 5424 bytes
SHA-256: 264aa49e9e519bb0d865ed670690796cafbc19f4d364daba26bbbed78d6ae1e3
font_01_sfnt_off0000fbc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBC6 10372 bytes
SHA-256: c7720465d7da3a8d9db7dc2646be6060a66cead8f9222f56cca15df8dc69a278

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