Malicious PDF — malware analysis report

Static analysis result for SHA-256 0694287e9946db66…

MALICIOUS

PDF

72.2 KB Created: 2020-11-16 17:10:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1502564bf1d38311f5782568c913b992 SHA-1: 19eed9dea37e24de943b6a1c6fe721a2287b781c SHA-256: 0694287e9946db662093aee8293a31edf20d07642114a7c0d624a6b7698c9a90
156 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many of which are likely part of a link farm designed to distribute malware or phish users. The heuristic PDF_SEO_LINK_FARM and ClamAV detection strongly indicate malicious intent. The embedded URLs, such as 'https://traffnew.ru/aws?utm_term=react+native+style+cheat+sheet', are likely used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffnew.ru/aws?utm_term=react+native+style+cheat+sheet
    • https://tanezogifa.weebly.com/uploads/1/3/4/3/134321065/nomemugolotoxoniwan.pdf
    • https://xokirolo.weebly.com/uploads/1/3/4/3/134394744/8030b.pdf
    • https://lakupemeza.weebly.com/uploads/1/3/4/2/134235705/revelat.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/3c1a7afa-d3b4-44cc-888e-ce152a244106/english_banana_games_raze_2.pdf
    • https://s3.amazonaws.com/vovuzize/hotspot_for_pc_apk_download.pdf
    • https://uploads.strikinglycdn.com/files/3271f8d4-f703-4ce6-8f25-c725fd443e57/34199441637.pdf
    • https://uploads.strikinglycdn.com/files/75077b0f-ff7c-4449-b448-793246ab63d8/95702414698.pdf
    • https://uploads.strikinglycdn.com/files/3c9f5cdc-b113-415a-aa19-4ded2836220c/qualcomm_atheros_qcwb335_driver.pdf
    • https://s3.amazonaws.com/jiwisigetizoxif/dipotukemesotifudi.pdf
    • https://uploads.strikinglycdn.com/files/99089f8b-c8e2-4907-aeed-250b0db2226f/38123266624.pdf
    • https://s3.amazonaws.com/vobuturinivi/51112022693.pdf
    • https://uploads.strikinglycdn.com/files/81907541-0543-41a7-9dee-414f97356e86/spore_asymmetry_mod.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_off0000dee0.bin
d39e2aa3f6d7c1c0e23ca2b3d11771f398492e494395e297a667b9d7812c17a4
pdf-font-stream PDF embedded font (sfnt) at offset 0xDEE0 4960 bytes
font_01_sfnt_off0000efcd.bin
283fa207431ebb02549cb2844e33ea13d5143d234d1308fdfbaa831bbcb74b87
pdf-font-stream PDF embedded font (sfnt) at offset 0xEFCD 10592 bytes