Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f8689ef51b6f3df…

MALICIOUS

PDF

67.0 KB Created: 2021-04-01 10:48:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 088d761f86b42c93a42a80ae626c0b46 SHA-1: 983fc200331f839d7f4a7fced3fa384e42f89547 SHA-256: 2f8689ef51b6f3df23ab74d01b4c962f28bdcda9552b477e9d741dcd4eb5240b
126 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The presence of numerous external URLs, including one pointing to 'xajibur.ru', suggests a phishing or malware distribution attempt. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates the document is part of a link farm designed to host malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://xajibur.ru/123?utm_term=update+mysql+data+using+php+form PDF link annotation
    • http://bewerab.22web.org/48326995462.pdfIn PDF document text
    • http://gapokaro.mywebcommunity.org/fifujasozarafogofazivut.pdfIn PDF document text
    • http://netolenogafa.getenjoyment.net/sajiguxewifudezapafaf.pdfIn PDF document text
    • http://wefigofozotime.22web.org/bruxelles_formation_anderlecht_adresse.pdfIn PDF document text
    • http://jixewelo.scienceontheweb.net/shri_aditya_hridaya_stotra_in_sanskrit.pdfIn PDF document text
    • http://gulavimip.iblogger.org/lords_of_the_sith.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vipuzala.myartsonline.com/short_inflammatory_bowel_disease_questionnaire.pdfIn PDF document text
    • https://s3.amazonaws.com/gozilum/cdr_file_format_editor.pdfIn PDF document text
    • https://a765b249-d442-4b07-8ea9-8318d996b894.filesusr.com/ugd/902d29_77912f5732c04fa5849e7f312c391db2.pdf?index=trueIn PDF document text
    • http://julexobe.rf.gd/54416470115.pdfIn PDF document text
    • https://s3.amazonaws.com/donarepemi/mosiwijulokedugidi.pdfIn PDF document text
    • http://rodukamofuf.epizy.com/76471435798.pdfIn PDF document text
    • https://c6506652-bf5e-4f52-be36-03dbfaede22c.filesusr.com/ugd/f74919_8db17e7235a643829445b5571bec5217.pdf?index=trueIn PDF document text
    • https://18aefb47-0221-41c7-ace0-4f78eb33e730.filesusr.com/ugd/bca722_524126da3a1d4d2cb6e47012ee928370.pdf?index=trueIn PDF document text
    • http://wanikulasebej.epizy.com/rosa_s_cafe_breakfast_menu.pdfIn PDF document text
    • http://kojodidekojamu.rf.gd/algebra_worksheets_10th_grade.pdfIn PDF document text
    • http://vanasonutatule.epizy.com/44820539030.pdfIn PDF document text
    • https://s3.amazonaws.com/likerajatob/how_to_reset_hp_p1102w_wireless_settings.pdfIn PDF document text
    • https://7ef5d8b8-74ac-4e0a-b0a0-fa61ca6462a8.filesusr.com/ugd/23e9be_cd72d59404de4c8c835175a1cacb0d72.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_off0000c7a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7A6 5676 bytes
SHA-256: acdac75bdbd9a3a9b78440c5d6514a1af9f7536c3d90097f480643825c072f0a
font_01_sfnt_off0000dac7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAC7 10568 bytes
SHA-256: 006fc6d9ed8d1cc6991c995504f08843a0365548144b31f0ff2220be6db5f5ab

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