Malicious PDF — malware analysis report

Static analysis result for SHA-256 84630b73e8c44534…

MALICIOUS

PDF

81.0 KB Created: 2021-03-16 02:50:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 072e189e1cb46ca650b6e5d7ae4c22b2 SHA-1: 2815699617ab01fcfd43950a68784124e4e8f49f SHA-256: 84630b73e8c44534bf776c21b3ca23d9f9d1c535ed364793456dfc37499e5a8b
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an embedded URI pointing to 'xajibur.ru', which is likely a malicious domain used to host phishing content or distribute further malware. The document body, though heavily obfuscated, contains references to social media, suggesting a lure to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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/strik?utm_term=how+to+get+someone+your+top+best+friend+on+snapchat PDF link annotation
    • http://mefogava.iblogger.org/xunofepebiwekefofuvu.pdfIn PDF document text
    • http://fastnoutservice.ru/27446980824uwo6d.pdfIn PDF document text
    • https://cdn.sqhk.co/sadudolamom/ribih8o/vudobowigefepupi.pdfIn PDF document text
    • https://cdn.sqhk.co/wufevinek/jgh6iaE/survival_rate_of_covid_19_by_age_usa.pdfIn PDF document text
    • http://handler-autoscout24.com/terexokonuxozetisemikaditi0py5.pdfIn PDF document text
    • http://yoganchik.space/how_much_are_pallet_jacks_worthg1914.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kegiburumimiwin.rf.gd/25996488382.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd21c6e4-fa81-4452-886f-88fa8f90f72f/21200059094.pdfIn PDF document text
    • https://73f4d879-981c-49fe-abc7-520f36a14a84.filesusr.com/ugd/b77b08_630a7ea011cf42d0b4ecad9d9b02cb62.pdf?index=trueIn PDF document text
    • http://mowigefugitixa.epizy.com/cancion_de_los_numeros_el_uno_es_como_un_palito.pdfIn PDF document text
    • http://kodowemomi.rf.gd/jawbone_mini_jambox_watts.pdfIn PDF document text
    • https://02aee961-309f-4c8b-9790-08f12c26706e.filesusr.com/ugd/8321db_8204a43c606e48a88dc1e16e204f9130.pdf?index=trueIn PDF document text
    • http://godutiliwaganos.rf.gd/cips_ethics_exam_questions_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f17d487a-41d8-447d-9a8b-430f1c5e88b1/how_to_get_red_light_on_black_diamond_headlamp.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d366f83f-fd34-4fee-bfb0-0b0fcc1d3f60/lavujigejajaxo.pdfIn PDF document text
    • https://72858ab8-d36f-4bc2-b208-e5ec56e76d01.filesusr.com/ugd/3a4e0e_2ed528d06d1f47acbe530f4bd3ff7408.pdf?index=trueIn PDF document text
    • https://1e35b969-1f99-48dc-8aa8-d0fb9638bdc8.filesusr.com/ugd/970baa_40187b9c13db46a8b09fb814272dfd85.pdf?index=trueIn PDF document text
    • http://wipivuvu.rf.gd/asp.net_mvc_razor_list_view.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ada64960-500b-4fcd-aabd-7aea1760db89/13945989787.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f9fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9FD 5832 bytes
SHA-256: f2639499744020984c78a38a5dc484685128a2a08ee70aaf93c0f32c065b0c03
font_01_sfnt_off00010dbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DBF 11312 bytes
SHA-256: eb3f653f523f266e8dee1b04c57f29ced97c275db3bf92a9c68b7cdae0e07096

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