Malicious PDF — malware analysis report

Static analysis result for SHA-256 6026e8c9934525e2…

MALICIOUS

PDF

73.0 KB Created: 2021-03-01 16:08:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 3c62ccbb1977eb5928c8cd922876bd81 SHA-1: d66941d4408c46b6964c26cc15360d386ed873e7 SHA-256: 6026e8c9934525e264ae8e99c9a48db3b2892a2edbdf883b8ccf1bb057280938
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable domains and hosted on services like Weebly and sqhk.co, indicative of a link farm or phishing operation. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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.
  • 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://lozipotod.ru/strik?utm_term=translation+worksheet+math PDF link annotation
    • https://cdn.sqhk.co/pakebisas/f3mQGKX/starfall_calendar_june_2018.pdfIn PDF document text
    • http://cryogen.me/pagopebubapenebokewuzugg3zl3.pdfIn PDF document text
    • https://davufafelasipip.weebly.com/uploads/1/3/4/3/134328138/92bbbe11.pdfIn PDF document text
    • https://cdn.sqhk.co/nisugavu/QPMdgjW/jexugux.pdfIn PDF document text
    • https://cdn.sqhk.co/mowasikuso/9sIBna9/kutimokonikivawir.pdfIn PDF document text
    • https://bevotiwi.weebly.com/uploads/1/3/1/4/131437753/9511362.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379221/normal_600ba3b70f816.pdfIn PDF document text
    • http://conicppjry.bid/pafanezovidixetenubemirtjcy8.pdfIn PDF document text
    • https://cdn.sqhk.co/vebudirepo/icijghC/wifi_analyzer_android_9._0.pdfIn PDF document text
    • http://omynutural.space/how_long_do_you_leave_cosrx_pimple_patches_on3a6hq.pdfIn PDF document text
    • https://zagavodemutiza.weebly.com/uploads/1/3/0/8/130814258/922ebe3d1.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/jarawaxanivu/industrial_canning_process.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_off0000e01e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE01E 5032 bytes
SHA-256: 9c1957f2ba87d3a5c06888b577da06bf7351412a971d3d9429b9f278650ec65f
font_01_sfnt_off0000f11b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF11B 10700 bytes
SHA-256: a08a1ba8b7bd5877ac0f0aee57fd78eca50887fe00fe920d93f4723c46ebc95a

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