Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2303d40b7d4155d…

MALICIOUS

PDF

68.7 KB Created: 2021-04-06 02:29:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 735865b565bba114fdba72dea22024e1 SHA-1: df2d3ea1a2d81eae33c6bc1ace074269b669e18b SHA-256: c2303d40b7d4155deae2891a8b915bb13551f9237ebb5fd6515736693cbe91a5
186 Risk Score

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 0.9996

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://crophysi.ru/123?utm_term=aparajita+tumi+full+movie+hd PDF link annotation
    • https://gopoxigubujazu.weebly.com/uploads/1/3/0/9/130969754/97763.pdfIn PDF document text
    • http://kunewalijaxuna.getenjoyment.net/83994872708.pdfIn PDF document text
    • http://xibomupazone.mypressonline.com/93006755130.pdfIn PDF document text
    • http://nujijaj.getenjoyment.net/tratamiento_nutricional_para_anorexia_y_bulimia.pdfIn PDF document text
    • https://xumebarukez.weebly.com/uploads/1/3/4/6/134687090/e967601d4052c.pdfIn PDF document text
    • https://fuwivofopotafuj.weebly.com/uploads/1/3/5/3/135388640/4715355.pdfIn PDF document text
    • https://cdn.sqhk.co/letinumi/oieaogc/10_pin_bowling_downtown_chicago.pdfIn PDF document text
    • http://wozekozexufoxol.scienceontheweb.net/what_is_diploma_in_supply_chain_management.pdfIn PDF document text
    • http://kowuterada.mygamesonline.org/finutitesojipijulowoneg.pdfIn PDF document text
    • https://cdn.sqhk.co/xavaxonad/2RrhgE7/98875907022.pdfIn PDF document text
    • http://my-favshopf.online/fofadawavetinakija5ta0s.pdfIn PDF document text
    • https://mopamosaxute.weebly.com/uploads/1/3/5/3/135322262/52d284b25ed415.pdfIn PDF document text
    • https://cdn.sqhk.co/kolokejo/Sjb2W61/dumafigerevupi.pdfIn PDF document text
    • https://ponatuxo.weebly.com/uploads/1/3/4/5/134596183/vabipun.pdfIn PDF document text
    • http://myyshooop227.site/working_with_emotional_intelligence_book_downloadr01xl.pdfIn PDF document text
    • http://sunufosabupes.scienceontheweb.net/navy_writing_desk_with_drawers.pdfIn PDF document text
    • http://intereriia.com/anomalias_dentariasm6gbc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c064424b-11a8-4e39-a524-24a74bcd733d.filesusr.com/ugd/54e393_70ab8b61727e4de58681bf8b19f9dc1a.pdf?index=trueIn PDF document text
    • http://movuzawizigevej.myartsonline.com/marpol_annexes.pdfIn PDF document text
    • https://8ed7b8cb-9bae-4def-ad9b-66b28cd11f91.filesusr.com/ugd/740d8c_dfcd4284872149fe80ad2a496107d5f8.pdf?index=trueIn PDF document text
    • https://8316a071-1c81-4729-bbc9-bb84f51c1359.filesusr.com/ugd/b2ba6b_ae5d4c4aeefe4c5eb3cc876eb14ff3a4.pdf?index=trueIn PDF document text
    • https://2987c0f4-171e-4473-b3f1-a5468658115b.filesusr.com/ugd/75ff8a_9a5ccadfae764d7083c7bea62f420726.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d058.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD058 5228 bytes
SHA-256: 02c51cc3b747d296de179b5bb6bbe24d4c189c309cb691501970c652060363d3
font_01_sfnt_off0000e205.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE205 10340 bytes
SHA-256: a64df4b9ef0f0a706c62b4bae9f3e4d0dde108cf7572084be9cf1ae1e61d8c4f

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