Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbcf60729b493e97…

MALICIOUS

PDF

68.5 KB Created: 2021-03-24 10:27:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a759b5bc44aa926c6c1af9cfa2db1b12 SHA-1: 6ba752ebe4ae3d9df662d967ebbcf8622c2dbfac SHA-256: fbcf60729b493e97ca8d052c70acfc9b6e93e730b11fee134dd97d8cb49bfa88
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for link farms or phishing campaigns. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of links, and 'CLAMAV_DETECTION' identifies it as a phishing trojan. The embedded URLs suggest an attempt to redirect users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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
  • 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://botokaw.ru/wix?keyword=identifying+acids+and+bases+worksheet
    • http://bathforlegs.xyz/cave_story_plus_freeho9jj.pdf
    • http://jotupati.22web.org/kidujegozaxaxavenetiri.pdf
    • http://lutefofojonu.iblogger.org/zepemelopuladono.pdf
    • http://good-production16.site/setutixanemahocww.pdf
    • https://ronaleju.weebly.com/uploads/1/3/1/4/131482819/5566879.pdf
    • https://fokomawirofuteb.weebly.com/uploads/1/3/0/9/130969657/8a0158ba.pdf
    • https://revugegan.weebly.com/uploads/1/3/4/6/134682990/videwuxij.pdf
    • https://bafewalu.weebly.com/uploads/1/3/5/3/135350628/busilewanor-dalovapofu-kurumad-xijaza.pdf
    • https://static.s123-cdn-static.com/uploads/4415081/normal_5fc717d5ad3b0.pdf
    • https://cdn-cms.f-static.net/uploads/4417815/normal_6056120c00a92.pdf
    • http://zomebosanetoviz.22web.org/kuzojinalus.pdf
    • https://pifabesi.weebly.com/uploads/1/3/5/9/135958575/gezakuweme-podavaraxiwopuf-xikorazulunuvu-pijivajamij.pdf
    • http://gakajolojogin.iblogger.org/tixigogaxesal.pdf
    • http://nakomajuvedina.iblogger.org/88383482751.pdf
    • https://cdn-cms.f-static.net/uploads/4445726/normal_604e7dd0bf83b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://fdd5f4e0-4443-4821-9021-ce7d41436e3c.filesusr.com/ugd/78c764_ad892e55007c41c0a205691d84770d71.pdf?index=true
    • https://2386e270-bd20-42c1-b3e5-1ba7eaa1d68d.filesusr.com/ugd/b4f0c6_43d6185ff294416c80e4e26094c8e3c2.pdf?index=true
    • https://f2d828cf-06d9-46ea-85af-d88b0bc20d44.filesusr.com/ugd/501a20_8122e44303464c868fd52003e667fa97.pdf?index=true
    • http://risakimo.epizy.com/fifty_shades_of_gray_theme_song_lyrics.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce68.bin
d1eefac75d1ad2eb501741abf38d42f44e605c4cebe12e1bc7d354d4ec672297		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCE68 5588 bytes
font_01_sfnt_off0000e17f.bin
c53573e21c938a1675d9f9459e4f020f0731392b3b23c41c783a5148907b442e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE17F 10376 bytes

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