Malicious PDF — malware analysis report

Static analysis result for SHA-256 46bf22f34274f981…

MALICIOUS

PDF

80.1 KB Created: 2021-06-01 07:33:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: d18fb7f4e2666294485a9db677b54b91 SHA-1: e88b1aa0571ebfbd386639ad1001543848651779 SHA-256: 46bf22f34274f981ac8b662b33cf24f80c48da87dbdfa2b539d60b101f1c2122
244 Risk Score

Malware Insights

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

This PDF file contains numerous links to external websites, many of which are flagged as malicious or part of a link farm. The document body, though heavily obfuscated, suggests a lure related to 'Kali linux usb install guide'. The presence of PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM heuristics, along with ClamAV detection, strongly indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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=kali+linux+usb+install+guide In PDF document text
    • https://tuloforukidape.weebly.com/uploads/1/3/4/7/134752744/6757067.pdfIn PDF document text
    • https://tekadepaja.weebly.com/uploads/1/3/4/3/134341299/bonixilemibesa-jobevuduxek-bubaned.pdfIn PDF document text
    • https://gulukuse.weebly.com/uploads/1/3/2/7/132740430/45be2faf420.pdfIn PDF document text
    • https://xovaxavirot.weebly.com/uploads/1/3/4/8/134853903/dbe6fae925a.pdfIn PDF document text
    • https://nekarima.weebly.com/uploads/1/3/4/8/134876173/4294983.pdfIn PDF document text
    • https://dakesobefugem.weebly.com/uploads/1/3/6/0/136056620/3314916.pdfIn PDF document text
    • https://jusemeki.weebly.com/uploads/1/3/4/5/134506960/jezurejunetufede.pdfIn PDF document text
    • https://kibalenujodoziz.weebly.com/uploads/1/3/0/7/130776895/4691026.pdfIn PDF document text
    • https://senaduwofajix.weebly.com/uploads/1/3/0/7/130775021/7638334.pdfIn PDF document text
    • https://lonojoxojiliw.weebly.com/uploads/1/3/1/4/131438577/zosowu-jutosuw-bumifironugi.pdfIn PDF document text
    • https://polepufexiri.weebly.com/uploads/1/3/1/3/131379743/1582217.pdfIn PDF document text
    • https://baxegirugono.weebly.com/uploads/1/3/5/3/135319521/81c1e.pdfIn PDF document text
    • https://zazatetapez.weebly.com/uploads/1/3/0/7/130739704/3458420.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0410ff7c-eb70-4dc4-badc-7228af97ee20/corporal_punishment_and_discipline_in_schools.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3000536-ae83-4305-be48-932ea4fa2698/john_kehoe_mind_power_exercises.pdfIn PDF document text
    • http://wozixokumo.pbworks.com/f/sketching_exponential_graphs_worksheet.pdfIn PDF document text
    • http://lugozamuxika.pbworks.com/w/file/fetch/144422037/most_common_words_in_english_language.pdfIn PDF document text
    • http://visetululiv.pbworks.com/w/file/fetch/144415359/4963700852.pdfIn PDF document text
    • http://jetipufagi.pbworks.com/f/best_3x_sensitivity_for_pubg_mobile_gyroscope.pdfIn PDF document text
    • http://nilanom.pbworks.com/f/how_to_cancel_brinks_security.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4457e903-253c-4365-8d26-6b9053ebdcc2/animal_farm_george_orwell_audiobook_chapter_1.pdfIn PDF document text
    • http://xoxafepapesu.pbworks.com/w/file/fetch/144424173/bewabusekar.pdfIn PDF document text
    • http://pezeliv.pbworks.com/w/file/fetch/144424458/34289842141.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2c13ca5-b690-49d3-a635-45e70391abe4/xikus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cc6e0ae-5452-451e-853f-fc538189d38f/nail_shops_open_today_in_jackson_ms.pdfIn PDF document text
    • http://xoxafepapesu.pbworks.com/f/what_is_an_example_of_combined_variation.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB5 5072 bytes
SHA-256: 87d03b4d79c2fe26a107230c86a4f4c2110da449448e9895a0794a0022a10577
font_01_sfnt_off00010108.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10108 2316 bytes
SHA-256: fa6718a310baa626e20cd0cd9d3c81eff18f726eb779e5b4ff2158366e738766
font_02_sfnt_off00010b77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B77 11432 bytes
SHA-256: 4009c42353ce66bfee46d307ca05009d738c03af60aa2bb6d4289c6603a5579f