Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ecc96cb7108dfe1…

MALICIOUS

PDF

82.9 KB Created: 2021-05-25 02:48:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: da82b5475311877f5b326aa7df047cd5 SHA-1: a51f323972726b999d01103e474200b054c05967 SHA-256: 9ecc96cb7108dfe18c4361d0177fda13e797e5dbd0457ca382e0995bac464f15
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

This PDF document was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The heuristic 'SE_BROWSER_INSTALL_LURE' suggests the document attempts to trick the user into installing a browser extension or update. The presence of a large number of external links, many pointing to PDF files on Weebly, indicates a link farm strategy, likely to improve SEO for malicious content or distribute further payloads. The primary IOC is the URL used in the lure, which is also part of a link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://dafemum.ru/strik?utm_term=how+to+make+google+docs+offline+on+pc
    • https://foxuveguba.weebly.com/uploads/1/3/5/2/135297813/bipub.pdf
    • https://static.s123-cdn-static.com/uploads/4378620/normal_6002da08b657d.pdf
    • https://jejusutib.weebly.com/uploads/1/3/0/7/130740078/53917d389278d.pdf
    • https://xobopigo.weebly.com/uploads/1/3/1/4/131437845/814376.pdf
    • https://boxemafal.weebly.com/uploads/1/3/3/9/133997404/664296fa5b7c.pdf
    • https://mekowoto.weebly.com/uploads/1/3/0/7/130738632/ropaxifedelonukunem.pdf
    • https://munuvatatopa.weebly.com/uploads/1/3/4/6/134686277/3281900.pdf
    • https://cdn-cms.f-static.net/uploads/4413007/normal_6049c1910ff67.pdf
    • https://ledajesaler.weebly.com/uploads/1/3/4/0/134041179/7738545.pdf
    • https://static.s123-cdn-static.com/uploads/4475580/normal_5ff0e867e66f5.pdf
    • https://xedasijaw.weebly.com/uploads/1/3/1/4/131453620/zenuxitudebe.pdf
    • https://mimitokiwunas.weebly.com/uploads/1/3/4/0/134012498/demidivik.pdf
    • https://cdn-cms.f-static.net/uploads/4424025/normal_6020b45d2893b.pdf
    • https://dojinutek.weebly.com/uploads/1/3/4/1/134108596/25125.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/zukogi/fezaxabefi.pdf
    • https://s3.amazonaws.com/minegikukovel/internship_report_in_housekeeping_department.pdf
    • https://s3.amazonaws.com/tazibabebamep/52043081086.pdf
    • https://s3.amazonaws.com/tiniruru/how_to_make_a_price_comparison_chart_in_excel.pdf
    • https://s3.amazonaws.com/dazifozixawus/area_of_compound_shapes_worksheets.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee69.bin
424add92854ddb7b2a2b35781577100b029187e3c898d84a1858ed36dcba0123		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE69 5284 bytes
font_01_sfnt_off0001005f.bin
51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1005F 1800 bytes
font_02_sfnt_off000108ed.bin
2972ad1cca39dd1b2608af9eedd97c134756a76bad267b525a0a22f9e7251ea8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x108ED 10824 bytes
font_03_sfnt_off00012dd8.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12DD8 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.