Malicious PDF — malware analysis report

Static analysis result for SHA-256 4682d1414e982d45…

MALICIOUS

PDF

75.7 KB Created: 2021-05-13 14:54:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 50bf85634295ab45d1873c00510645a9 SHA-1: 9aff9a52a284c127acf1153486101d584f65d5f0 SHA-256: 4682d1414e982d45feadfd61a7edb54a8c2637c7ee9a4b4770579cc1862c0a75
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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://zajinet.ru/strik?utm_term=how+old+was+derek+when+his+dad+died PDF link annotation
    • https://bipejazikapidim.weebly.com/uploads/1/3/4/5/134529651/3115038.pdfIn PDF document text
    • https://cdn.sqhk.co/vibebexez/he5ibF8/diskdigger_photo_recovery_iphone_indir.pdfIn PDF document text
    • https://cdn.sqhk.co/tuvuderasaza/gdzLTgi/penguin_isle_hack_android.pdfIn PDF document text
    • http://zonerokemub.getenjoyment.net/19172776735.pdfIn PDF document text
    • https://cdn.sqhk.co/waxipefimafa/1GIJ7GV/86425378181.pdfIn PDF document text
    • https://pidilamobojuri.weebly.com/uploads/1/3/5/3/135310388/ee6b2bb071852fa.pdfIn PDF document text
    • http://lulamugateso.mypressonline.com/murix.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/ed370643-f98e-4a8b-be09-44105390da05/90412673023.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1a4dcb2-157f-49d5-87a5-611ad3d7bea2/73402313745.pdfIn PDF document text
    • https://9fc80a0e-b25b-4135-afeb-9811a1ea6bf8.filesusr.com/ugd/91e123_8156b70e8fa340e7bf8144072c958fbd.pdf?index=trueIn PDF document text
    • http://sidepojedava.myartsonline.com/brief_aggression_questionnaire.pdfIn PDF document text
    • https://661c91a2-68a2-4ae3-aaac-ef96b6cc7894.filesusr.com/ugd/b926a8_bd44ef0b0a7f4721991c9992fd367382.pdf?index=trueIn PDF document text
    • http://lufiwivumijej.myartsonline.com/babokafesovuru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b8d6204-d76d-4596-86b0-2cf7a8c2421a/three_phase_transformer_load_calculation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/231b85eb-f979-4bb7-b409-aa3d7115c145/sijedisasixulezidomuv.pdfIn PDF document text
    • http://sefokirof.onlinewebshop.net/nixubunumamuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d71b9400-fcaf-4ae5-88eb-98aeebd7917e/jubibesawujavobomepa.pdfIn PDF document text
    • http://wusozupit.myartsonline.com/ap_scert_text_books_download.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC87 5032 bytes
SHA-256: 656da125faabc2ac5cfdcdcab7282702d42c7354ebe9720c5e693b16e368eee2
font_01_sfnt_off0000fda9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDA9 10360 bytes
SHA-256: 1759213e820889bd4884ffb4c112acfd31741093d556edb6653e194b97a9852a

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