Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dd6d2b4ee01e065…

MALICIOUS

PDF

107.4 KB Created: 2021-04-05 04:11:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: ad0e43f1c82a666eef339deabbaa00e4 SHA-1: 67529c93cab221f450fc9dc05c6768e9b6fa9786 SHA-256: 9dd6d2b4ee01e06557439fe6436d854eb580a5d4764937c6df46f945682584bf
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many of which point to disposable domains and are likely part of a link farm designed to manipulate search engine results. The primary URL, 'https://soxebez.ru/strik?utm_term=what+is+the+history+of+islamic+education+in+nigeria', suggests a lure related to educational topics to attract clicks. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://soxebez.ru/strik?utm_term=what+is+the+history+of+islamic+education+in+nigeria PDF link annotation
    • https://cdn.sqhk.co/godajaxox/hgiIhco/lifajabupanudebitamubosef.pdfIn PDF document text
    • https://palegovod.weebly.com/uploads/1/3/1/0/131070329/6a26c1a2c4.pdfIn PDF document text
    • http://pagavopalubutu.scienceontheweb.net/is_apple_pencil_compatible_with_ipad_mini_5.pdfIn PDF document text
    • https://cdn.sqhk.co/pemanunid/xYENgeZ/23979098648.pdfIn PDF document text
    • https://linezajokopu.weebly.com/uploads/1/3/4/6/134629872/pixit.pdfIn PDF document text
    • https://sojanonef.weebly.com/uploads/1/3/0/9/130969598/156dbc5be2.pdfIn PDF document text
    • http://lijonotogi.scienceontheweb.net/gojasizixamuzuzel.pdfIn PDF document text
    • https://kofoxutekibefa.weebly.com/uploads/1/3/1/4/131454286/576dfd59d.pdfIn PDF document text
    • https://cdn.sqhk.co/tetaxekumipi/bjhhhgd/16413889560.pdfIn PDF document text
    • https://pikoxujedogusu.weebly.com/uploads/1/3/4/6/134665618/xelawigase_felugejununid_tufilirarezofo.pdfIn PDF document text
    • https://cdn.sqhk.co/putuziboki/shhgqfw/my_singing_monsters_toys_series_1.pdfIn PDF document text
    • https://cdn.sqhk.co/rutesawir/VDPOjjh/mixuwiduvutafabaremido.pdfIn PDF document text
    • https://cdn.sqhk.co/memenewo/ihgghgg/viwebenupewipokup.pdfIn PDF document text
    • https://cdn.sqhk.co/goseluna/mfjijjf/87163536815.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/5ffeeeb3-decf-4642-bd27-752e313bfa5b/which_is_better_safety_razor_or_straight_razor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7058611-7c7d-4757-8c55-8cc79c220c78/52943978487.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23b17054-e8db-46c4-9f6e-ccf6ed18951a/34674307819.pdfIn PDF document text
    • http://xefiposokupama.myartsonline.com/basic_of_sql_queries.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33a4d293-0bf5-4557-b5b9-f59ab3dd91fd/how_to_play_dd_5e_for_beginners.pdfIn PDF document text
    • http://bagugexasorip.myartsonline.com/91132328316.pdfIn PDF document text
    • http://xinifaduzinuvu.onlinewebshop.net/xinonabib.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off000177e8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x177E8 22704 bytes
SHA-256: 6aa20f43a3f9687f368373a22f84d1ddb2d41af8dae6136e83c08a6cceca0f70
font_00_sfnt_off00013b43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B43 5548 bytes
SHA-256: 7a738f2ab6b2b09aed8705472f03a159ef9e4987651a5b26520ac6e37a7b715f
font_01_sfnt_off00014e10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E10 13324 bytes
SHA-256: 87582c8439e6fb74b3842c1aa3b22c65f930cf8e219c87f212e9c009ceea4bc2