Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd576c497d86604f…

MALICIOUS

PDF

92.9 KB Created: 2021-05-17 06:01:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 9207b6ec0e4138065f4b10ad45352f8e SHA-1: 662a021c24a5e9e7533a5efa0e7cf519c5abfdd7 SHA-256: cd576c497d86604f504032a2ccb4db1045b7ea22982d063c241e0850e4a35b1c
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains embedded URLs and is flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a date, suggesting it might be a lure for technical information. The presence of multiple disposable hosting links further supports a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 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://zajinet.ru/strik?utm_term=cisco+command+line+to+create+vlan PDF link annotation
    • http://fefikaniki.22web.org/90033308748.pdfIn PDF document text
    • http://drive4mclaneaustell.com/classifying_angles_worksheet_grade_4g7900.pdfIn PDF document text
    • http://fajesamosini.sportsontheweb.net/cancer_esofago.pdfIn PDF document text
    • http://deflecfcvy.best/chet_atkins_freight_train_tab9o1ny.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480414/normal_5fe276ccaf1c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385412/normal_600e13550c8fc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451225/normal_5ff9803427a2d.pdfIn PDF document text
    • https://cdn.sqhk.co/vagekasip/itNaihw/ponutativuwuratesilamake.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482208/normal_605fe76f3b066.pdfIn PDF document text
    • https://cdn.sqhk.co/jufebarur/jiOi1z0/22172529516.pdfIn PDF document text
    • http://bakavorun.getenjoyment.net/75447119440.pdfIn PDF document text
    • http://vurenosul.22web.org/tafotiwuvitumu.pdfIn PDF document text
    • http://kekewawoxugar.sportsontheweb.net/59776841020.pdfIn PDF document text
    • http://healthit.space/38496871204488gi.pdfIn PDF document text
    • https://cdn.sqhk.co/rijunawep/MiiigcV/adobe_premiere_rush_video_editor.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4c65129-f74a-4ac7-8172-2fdfd677dc5f/bebas.pdfIn PDF document text
    • http://zorikeroz.onlinewebshop.net/pdf_file_editor_for_windows_10.pdfIn PDF document text
    • http://benifolagalat.epizy.com/biotic_and_abiotic_environment.pdfIn PDF document text
    • http://lanotiwigizoxep.epizy.com/nedekonutumokupolona.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e12883e4-3d71-459c-9d40-20f431109ceb/najegibosararijed.pdfIn PDF document text
    • http://popofisofol.myartsonline.com/how_to_find_the_interior_angle_measure_of_a_regular_polygon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfca4ab2-1b7b-495e-9129-363371670466/12200551643.pdfIn PDF document text
    • http://vedisupekak.epizy.com/tibijo.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_off00012fd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FD5 5048 bytes
SHA-256: bb292b01bce9a979b2d777db8bc7648012bc9bbb0fff725d9f2ff65d29a0e0a1
font_01_sfnt_off000140e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140E8 10972 bytes
SHA-256: c3b59bbd1fe2b05879b9f90db180f14f6b40d120e3327f77af1f65fe43f85165

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