Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cb7b1e95ee676c4…

MALICIOUS

PDF

71.8 KB Created: 2020-12-17 15:44:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 88ab0b13c39fe65b08161db69c2b895e SHA-1: 03f392528a8b0f2d599048d22c4ce7869605688a SHA-256: 0cb7b1e95ee676c44b73c301f0902a61cfd1223925f97b87b1e19d72312963f3
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is disguised with text related to 'girl scout daisy uniform requirements'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. 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://cctraff.ru/strik?utm_term=girl+scout+daisy+uniform+requirements In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369304/normal_5f8c0c7fcd08c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443292/normal_5fd32719e0a23.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474719/normal_5fbe18b66d9a3.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://static1.squarespace.com/static/5fc006d0104edf1d777bfbd4/t/5fc30a5308845d0924ee2004/1606617684099/los_animales_printable_worksheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ded08f8-1ef7-4e46-8f19-42231f5ca7e9/nenanibudoxigefok.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc115bd5e8e827d428ee316/t/5fc25aee9d79364840da0467/1606572784251/slinglink_turbo_w1_sl300_100_manual.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc506301c8c7413144c7057/t/5fc9c5ac822fbd3263decfcc/1607058860994/lesson_plan_example_for_high_school.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf442d334513fae414040/1606218818678/cyber_monday_2016_bluetooth_speaker_deal.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc174bcc89e1c4b8fc25c90/t/5fcec71d3fa051062b33d561/1607386924248/download_game_oz_broken_kingdom_mod_apk.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc18e758787e8798970a1dd/t/5fce4182662d5e24e0cf707e/1607352706770/38500903964.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce1829e5cb4c30585e093d/t/5fcffb9f3679834d723c9f37/1607465888416/wimekijut.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc596fed49dd12447542bd0/t/5fd64d83c4373837b9083a62/1607880068339/urbanismo_tactico_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2922edf-ac01-4ac8-92f4-6bcac94d3d23/libexuvasilola.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_off0000cf50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF50 5308 bytes
SHA-256: ad3043644dfb71a7a8da6dfcb5786eab4df3b0467fbc904037addd3b6ba3d178
font_01_sfnt_off0000e14a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE14A 10120 bytes
SHA-256: dfd90dfd9ce8f266d2c74834a0b03b8973ee1cc5e5363507971484d398e8219b
font_02_sfnt_off000103e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103E4 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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