Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f0d6ef146090857…

MALICIOUS

PDF

93.8 KB Created: 2021-03-05 04:22:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 957972d8f82382812b6dc4ef4befd4f3 SHA-1: 48833e96552a06f5faf4593b6d7588007849bdad SHA-256: 7f0d6ef14609085782c19bde643a81618eba890fadb89ca9d68b0df2bf0ac6ea
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous embedded URLs, with one prominent URL pointing to 'xajibur.ru', suggesting it functions as a link farm or phishing lure. The document body, though heavily obfuscated, appears to be a deceptive lure related to textile fibres, likely to trick users into visiting the malicious URLs.

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/aws?utm_term=what+are+the+three+types+of+textile+fibres PDF link annotation
    • http://kujotisokuvo.iblogger.org/hp_photosmart_7515_cartridge_problem.pdfIn PDF document text
    • http://wurigebajufopo.22web.org/bobofitozakarowizawab.pdfIn PDF document text
    • http://kesisofawa.mygamesonline.org/terexeviwo.pdfIn PDF document text
    • http://dokojekiferej.mygamesonline.org/how_to_setup_symbol_barcode_scanner.pdfIn PDF document text
    • http://zonizubiro.getenjoyment.net/pc_das_english_grammar_book_free_download.pdfIn PDF document text
    • http://zipubezexupoka.mywebcommunity.org/2018_first_aid.pdfIn PDF document text
    • http://ganitigusawev.mygamesonline.org/vizio_e320vl_power_supply_board.pdfIn PDF document text
    • http://tipofeliluget.medianewsonline.com/wejidegepepatebitofit.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://luvetux.myartsonline.com/how_to_do_basic_excel_functions.pdfIn PDF document text
    • http://xetobagog.rf.gd/motions_of_celestial_bodies.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e86cf4e9-ab99-449d-9fb4-c2d9710a2696/74199022238.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8730c64-38c2-479e-8ba3-bec423483dc5/persona_4_golden_social_link_guide_marie.pdfIn PDF document text
    • https://a4346b84-4611-49ab-b113-80c9188ca613.filesusr.com/ugd/078c79_89d0504b8a364609ab8ed0d4164a7c93.pdf?index=trueIn PDF document text
    • http://sisaxuvelomuz.epizy.com/mubipop.pdfIn PDF document text
    • https://307a23dc-bb60-4906-9a68-69e45957aa19.filesusr.com/ugd/d2057d_1657db34480c41e29f9265eccc068219.pdf?index=trueIn PDF document text
    • http://xolazituvote.epizy.com/all_baul_song_free.pdfIn PDF document text
    • http://pusapovewazigu.onlinewebshop.net/how_much_do_software_engineers_earn_in_uk.pdfIn PDF document text
    • http://xekivis.rf.gd/borges_y_yo_resumen_y_analisis.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_off00012fc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FC2 5312 bytes
SHA-256: a3c67c96cca9aab194e9cc394d1cba3aa00e4cd082720ef3e3ed87b9924398e6
font_01_sfnt_off000141e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141E3 12352 bytes
SHA-256: 6e0a254486ed183b3e430388488b54013409e2e4b6e56d27984312efa3378ed6

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