Malicious PDF — malware analysis report

Static analysis result for SHA-256 992ca7ed57948ea8…

MALICIOUS

PDF

64.7 KB Created: 2021-01-25 16:17:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 97345f1065d2eecd34482e7414907a0e SHA-1: b9e13047f06d549de83c8d03b44f00f60bf3aac8 SHA-256: 992ca7ed57948ea80e75ffea290f23f3bc96bf5da0dc099b163b2ef27a5035fc
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF containing embedded URLs, one of which is identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of embedded URLs suggests an attempt to lure the user to external malicious content, likely for phishing or to download further malware.

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://traffmen.ru/aws?utm_term=aap+se+milkar+acha+song In PDF document text
    • https://cdn.sqhk.co/sizozizaj/hE6ihii/medieval_warfare_reforged_ores.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366017/normal_5fcdc2df65847.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379030/normal_5fc993cd7d522.pdfIn PDF document text
    • https://jufozawuvinuxak.weebly.com/uploads/1/3/5/3/135326647/c4d703a790d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412768/normal_5ff76a122c287.pdfIn PDF document text
    • http://wssummer.space/free_video_call_software_download64r4r.pdfIn PDF document text
    • https://wikifepum.weebly.com/uploads/1/3/3/9/133986434/ff80d46a5df2144.pdfIn PDF document text
    • https://zuwuroxiver.weebly.com/uploads/1/3/1/0/131070979/aabbb9.pdfIn PDF document text
    • https://cdn.sqhk.co/vilonunufuk/ziatNc8/22182293436.pdfIn PDF document text
    • http://redpandarecycling.com/artillery_2020_sidewinder_x1_3d_printer_v4vaeiw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496374/normal_5ff8358e68add.pdfIn PDF document text
    • https://muzezibabut.weebly.com/uploads/1/3/0/7/130739211/bipenuruzibejo.pdfIn PDF document text
    • https://lepovomika.weebly.com/uploads/1/3/4/7/134701686/nisekibufatafobe.pdfIn PDF document text
    • https://cdn.sqhk.co/pemanunid/jh4ihhh/wogodorezuvemirupoje.pdfIn PDF document text
    • http://copyrights-notices-helps.com/jegevawolebexovizooftlh.pdfIn PDF document text
    • https://cdn.sqhk.co/rapurakoke/2uFTkZR/car_cards_racing.pdfIn PDF document text
    • http://kikovetademu.22web.org/python_autoformat_online.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vebavibokifoko.epizy.com/97312246322.pdfIn PDF document text
    • http://xenemusexo.epizy.com/42104852837.pdfIn PDF document text
    • http://tudutov.rf.gd/free_blank_calendar_template_5_day_week.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_off0000bf7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF7E 5400 bytes
SHA-256: 99b0b62d27f107a459bbff41d4a6f0022a23ec2455d02f637ee632c8ad92dd36
font_01_sfnt_off0000d1b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1B1 10396 bytes
SHA-256: f3c6aa0b66e9ee91fd1264eb0fcf51eda3e3894c378f32d64501abd7e3f43c78

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