Malicious PDF — malware analysis report

Static analysis result for SHA-256 9882a9d59893234a…

MALICIOUS

PDF

89.3 KB Created: 2021-04-08 02:26:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 5fcaea17bb4b4c6edee0df046d67ce46 SHA-1: c1796402814df60a1f08b599086787c5b17c0725 SHA-256: 9882a9d59893234a52db266b488c4fe348e28b86e4023446a28217f516cccd09
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains and services like Weebly and sqhk.co, indicating a link farm or SEO spam operation. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via these external links. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://kuzutuzo.ru/wix?keyword=crayfish+dissection+lab+answers+quizlet PDF link annotation
    • https://divamokavagi.weebly.com/uploads/1/3/4/8/134871471/298bd4.pdfIn PDF document text
    • http://tuwimig.scienceontheweb.net/xabiloza.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/6hdigjb/calligraphy_fonts_free_marathi.pdfIn PDF document text
    • https://wutiduxa.weebly.com/uploads/1/3/5/3/135300785/783769a6140943e.pdfIn PDF document text
    • http://lorenbayi.com/torisimunodi6oc9i.pdfIn PDF document text
    • http://kugewezebuvigiw.mygamesonline.org/fobig.pdfIn PDF document text
    • https://cdn.sqhk.co/mumeriretepi/haZijC2/idle_highway_mod.pdfIn PDF document text
    • https://ginekimef.weebly.com/uploads/1/3/0/7/130738874/2732463.pdfIn PDF document text
    • https://cdn.sqhk.co/kasuvapexal/IKhjrCT/fuzufuxalagixizazepo.pdfIn PDF document text
    • https://mijonogopo.weebly.com/uploads/1/3/5/3/135327524/6e848d5a42c.pdfIn PDF document text
    • http://about-central.com/75313527200lulb7.pdfIn PDF document text
    • https://mawakigimewu.weebly.com/uploads/1/3/4/8/134875352/padiberovewub-sugizaranu-rirori-fuzitijeleka.pdfIn PDF document text
    • https://cdn.sqhk.co/fujonexa/1iiijc3/my_birthday_party_paragraph_for_class_1.pdfIn PDF document text
    • http://fc-aromat.ru/622125602237w5s3.pdfIn PDF document text
    • http://gativatur.getenjoyment.net/project_risk_analysis.pdfIn PDF document text
    • https://wudusalulolatus.weebly.com/uploads/1/3/1/6/131606476/nawipuxe_kuvovelifojo.pdfIn PDF document text
    • https://cdn.sqhk.co/dukizukijire/5jbfHgi/blackbird_fly_camera_malaysia.pdfIn PDF document text
    • http://spainwow.pro/old_hag_in_robin_hood_prince_of_thievesyyiw1.pdfIn PDF document text
    • https://dovidememalow.weebly.com/uploads/1/3/4/6/134601329/dibatazozagujijepag.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6cda4dd4-8aac-43e7-8003-7c0eea9f7907.filesusr.com/ugd/34e26e_8f10ff01f00d480e8bb4568985ed0464.pdf?index=trueIn PDF document text
    • https://e0d0d77b-4c00-4265-bc22-f0cc5cf11ada.filesusr.com/ugd/957eb4_49b9a371ed3a469a8aa6b0c7c48a8f2f.pdf?index=trueIn PDF document text
    • https://1864c106-1a4f-4194-99fb-dabd5a0af450.filesusr.com/ugd/17b194_8c22c236c8f944a98b4d49d291fbeaf9.pdf?index=trueIn PDF document text
    • https://4779f2f8-a33e-4327-9c78-21ee0bcf4620.filesusr.com/ugd/31bf02_5901cc12d2754dfa8d1b17916b764dde.pdf?index=trueIn PDF document text
    • https://b24182fa-1fee-416c-9f57-41d8a36573e1.filesusr.com/ugd/1cc367_e90e540d91a34bb8b744bdc2eb8f615a.pdf?index=trueIn 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_off0000f26e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF26E 12884 bytes
SHA-256: 0ab435b147a076bae35aff0ad23f9e50701d1b92da2a0174e0a0f5f21c55a8c2
font_01_sfnt_off00011c3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C3D 5524 bytes
SHA-256: 60f2df159e8166f282cdf554c7dbbcd8dced4a332427a09903656663128c08af
font_02_sfnt_off00012f1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F1D 11716 bytes
SHA-256: 5153bcbfcf89a7c5e632a86af11ce124b3153832a1e5db1c90af1ac3fcd5c0d6

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