Malicious PDF — malware analysis report

Static analysis result for SHA-256 415ee3857f09f7d7…

MALICIOUS

PDF

80.9 KB Created: 2021-04-01 02:24:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 00d2ff5ccd269d3b70029c14a0b5d861 SHA-1: f839ea50bb0d7fe016018a6877f18d2709bff0e5 SHA-256: 415ee3857f09f7d7e883b5618cf0601b0708e883c93a3e7a9bc8e68d6eb58a86
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of external links, many pointing to disposable hosting, forming a link farm. The embedded URLs suggest an attempt to redirect users to malicious sites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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 http://fedezin.scienceontheweb.net/43132091893.pdf In PDF document text
    • https://wiperorapaxomun.weebly.com/uploads/1/3/5/3/135323561/f006671ddfa292.pdfIn PDF document text
    • http://merexazumebenag.medianewsonline.com/basic_symbolic_logic.pdfIn PDF document text
    • http://smilex.club/331699516690m5oe.pdfIn PDF document text
    • http://copyrightnotice-ig.com/tabla_de_multiplicar_hasta_el_20bnqor.pdfIn PDF document text
    • http://fasoxuxesatilu.sportsontheweb.net/kjv_bible_history.pdfIn PDF document text
    • http://majexifavel.scienceontheweb.net/busibogixalifujugij.pdfIn PDF document text
    • http://nokiwurugibub.mypressonline.com/bikosunule.pdfIn PDF document text
    • http://visunuduxat.mypressonline.com/lotebix.pdfIn PDF document text
    • http://xosubowavenu.mypressonline.com/koleka.pdfIn PDF document text
    • https://riwominejakubik.weebly.com/uploads/1/3/4/5/134598273/wofozetum.pdfIn PDF document text
    • https://sotipazokelaxat.weebly.com/uploads/1/3/2/7/132712266/liwolomezeg.pdfIn PDF document text
    • http://nebemor.mywebcommunity.org/tozubujefewitozilodesosaf.pdfIn PDF document text
    • http://akfb.online/1079232276830pc5.pdfIn PDF document text
    • http://tikanaw.mypressonline.com/92842184391.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://feedproxy.google.com/~r/wb/ENAH/~3/4NO0L8wlyOA/wb?keyword=what%20powder%20is%20best%20for%206.5%20creedmoorPDF link annotation
    • https://6d1a2d78-ebd2-4140-94a0-411197be5b5f.filesusr.com/ugd/88ff89_e270ff6e44664adc9062b31421182fce.pdf?index=trueIn PDF document text
    • https://f4a80ce2-0a24-44e2-aff7-13c87a434ee9.filesusr.com/ugd/ace063_cb509bcb07554206a3c290041b21491c.pdf?index=trueIn PDF document text
    • https://1482387f-61d8-47e1-b538-9b7f1e8b89fb.filesusr.com/ugd/538d67_cfbd002a9acc4cfeb7bde3941b674f33.pdf?index=trueIn PDF document text
    • https://013c3ecd-17dd-4738-ad87-554153c764a5.filesusr.com/ugd/36f25b_c991e547dd7e41d19eaca4a8456f4b39.pdf?index=trueIn PDF document text
    • https://77a48bbd-706a-45f8-a225-ac1cc02029d7.filesusr.com/ugd/3be48b_c214bc2ad3a6418faea4d436275e23d2.pdf?index=trueIn PDF document text
    • https://3e1d1bad-f645-4ebd-ac75-469e7ff7c972.filesusr.com/ugd/e745be_479488ccc77749ea90dadffec5cbbf99.pdf?index=trueIn PDF document text
    • https://43a98339-0465-49d0-a416-8cef4780896f.filesusr.com/ugd/89258f_900d04d997304f5da2a4bdfa32ff1063.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_off0000fa23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA23 5920 bytes
SHA-256: ab60e77df541d357bf6a7053c7d11b2e0f5389ecacdc1e3bf6ccbe6eff0b0c19
font_01_sfnt_off00010e3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E3F 11720 bytes
SHA-256: 33a73a3ac4ad5afc5e053dcb8911033efe067ec346431e183af6639ef8dd0e34