Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3014bd0e35d8f76…

MALICIOUS

PDF

76.2 KB Created: 2021-03-23 01:15:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: ee628f75ceac11f73db804ee224f97ea SHA-1: e5699f7ba77ab6c2bd00ef043159bf4595f67dd4 SHA-256: b3014bd0e35d8f760be0643e1fd6a7c3e0607269c2f4b22035f9509fd3b974b9
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains a large number of external links, with one pointing to 'jumiwimov.ru', suggesting a phishing or malicious redirection attempt. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic further support this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • 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://jumiwimov.ru/strik?utm_term=what+is+kx PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4447431/normal_5ff27865c4657.pdfIn PDF document text
    • http://koziwebakeru.iblogger.org/xovodomafifijipan.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425237/normal_5fffa841599b0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422890/normal_5ff71b911d13d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462352/normal_601212e08a611.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443329/normal_5fcb7572e5afc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zibenoroduzuw/pululasowoguralezixuru.pdfIn PDF document text
    • https://1a2149e7-ca7f-4e7c-a584-0e483de6f3af.filesusr.com/ugd/9219f8_9213ede31f4343e6a01a73a7b33c47b5.pdf?index=trueIn PDF document text
    • https://9e7b01ce-91ce-414a-93c5-ade8df4b7359.filesusr.com/ugd/cfbfd2_fe146a72090f4429957aad8360f95175.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1277196-ac83-4faa-a7ac-d931ccc0f9f7/mechanical_engineering_basic_concepts_for_interview.pdfIn PDF document text
    • https://s3.amazonaws.com/ditiruz/38280711930.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8da6731-fdb9-43a3-a6df-58e95dc0eb00/ada_mp1_clone.pdfIn PDF document text
    • https://781b76d0-895c-4d4e-90f3-491762fad171.filesusr.com/ugd/894952_975c84b8ed6f486bb57d0ed08923a30a.pdf?index=trueIn PDF document text
    • https://52ed6390-a5c1-4502-9f93-599cf6d98ad1.filesusr.com/ugd/f7fbc8_6f6dbec07b554e1e92e9b3520303aea9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tuxalowafokuvo/77843626278.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c87e8ac-e7a2-4736-8e1d-3bda59a1a345/visual_studio_2010_express_edition_free_download_offline_installation.pdfIn PDF document text
    • http://bikemeno.rf.gd/87130700114.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b99db314-5f77-4e29-adf8-db861eebd126/siwisofikamo.pdfIn PDF document text
    • https://s3.amazonaws.com/kimone/california_custodian_of_records_affidavit_form.pdfIn PDF document text
    • https://s3.amazonaws.com/tevigotu/rusitolabamabiwin.pdfIn PDF document text
    • https://s3.amazonaws.com/geraromu/real_estate_market_analysis_columbia_sc.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_off0000ebde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBDE 4788 bytes
SHA-256: 01f2ba076c7ff0091fe1cbcb05bfbb7fd6eef33fe7212c754afc5e97fc481fe8
font_01_sfnt_off0000fc37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC37 11276 bytes
SHA-256: 196a15596fb44edad1572644011f29e902a19508c492307f7f655d4515fef5bc

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