Malicious PDF — malware analysis report

Static analysis result for SHA-256 b76956afc97f8411…

MALICIOUS

PDF

73.5 KB Created: 2021-02-21 17:08:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 4b60199b563ed5a3d400708329fc70eb SHA-1: 4bffb4c840e89a3517a79c00ab4b8859bdb14825 SHA-256: b76956afc97f84115427a15525fef2aa19a203c379853fb94a1d983735eafe5d
184 Risk Score

Malware Insights

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

The PDF document was flagged by multiple heuristics, including critical alerts for malicious redirector links and a machine learning classifier. It contains a large number of embedded URLs pointing to disposable hosting, suggesting a phishing or malware distribution scheme. The ClamAV detection further confirms its malicious nature, identifying it as Pdf.Phishing.Trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://crophysi.ru/strik?utm_term=tappan+gas+oven+parts In PDF document text
    • https://cdn.sqhk.co/dugelabomaw/chjc1eU/zorazexas.pdfIn PDF document text
    • http://vavenuvukubanav.22web.org/threat_analysis_report_definition.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412377/normal_60199959187bb.pdfIn PDF document text
    • https://cdn.sqhk.co/rerunagakiz/4jc5ghF/45858294004.pdfIn PDF document text
    • https://susudomi.weebly.com/uploads/1/3/5/3/135319884/foxawere-wusowejonopoj-kamiwovarefaz-pagusaxivujije.pdfIn PDF document text
    • http://idealica-ufficialeitalia.website/giwamiruzukefxldlu.pdfIn PDF document text
    • https://kujunegisim.weebly.com/uploads/1/3/1/3/131380440/22683f7d1549.pdfIn PDF document text
    • https://cdn.sqhk.co/wimedizi/jhhcjfc/90723283940.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413697/normal_60058d38532cc.pdfIn PDF document text
    • http://gawebakibi.22web.org/50104955480.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376598/normal_6024920b5b706.pdfIn PDF document text
    • http://santaparker.store/tiludemovaxuyelmy.pdfIn PDF document text
    • http://natnat.fun/wolf_simulator_evolutionsedjy.pdfIn PDF document text
    • http://detonic-ordina.website/civil_rights_timeline_for_kidsir5wf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486356/normal_6024f5f14f05d.pdfIn PDF document text
    • http://recepty-dd.info/xesosim9vln.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465252/normal_5fe55789374ef.pdfIn PDF document text
    • https://tateleref.weebly.com/uploads/1/3/5/3/135322569/pafewe.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/pasutiz/poe_hideout_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/xoxaneral/bmw_e39_electrical_troubleshooting_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/busutafitufe/gapifapibe.pdfIn PDF document text
    • https://s3.amazonaws.com/sorogamat/reliable_vs_unreliable_narrator_definition.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_off0000e09d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE09D 4964 bytes
SHA-256: d388e63dd2029936bf40aa194dc2d85cd7a0939bf359029e74aa37cdbed07e66
font_01_sfnt_off0000f19f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF19F 12064 bytes
SHA-256: fa598b7efcead3553969c39eff7164fae4b0050a0b10cc19162353225dbe7620

Open this report in the interactive analyzer, or submit your own file for analysis.