Malicious PDF — malware analysis report

Static analysis result for SHA-256 133084db405e957a…

MALICIOUS

PDF

36.8 KB Created: 2020-10-05 06:06:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: f7dd08498deddeb85960eeafa12b5e88 SHA-1: e1828604af40a84c771423b4debf1379023f03ea SHA-256: 133084db405e957afb15a7b5ab51e15bfd6919648cf379d57bb86b1e7dc6968a
124 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, also contains URLs that appear to be part of a link farm designed to distribute malicious content. The ML classifier strongly supports the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 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://gettraff.ru/strik?keyword=bhagavad+gita+sadhak+sanjivani+pdf In PDF document text
    • https://site-1039173.mozfiles.com/files/1039173/17670830870.pdfIn PDF document text
    • https://site-1037224.mozfiles.com/files/1037224/21696882757.pdfIn PDF document text
    • http://files.phoenixnetballtrainingprogram.com/uploads/1/3/0/7/130776401/8446fca.pdfIn PDF document text
    • http://files.tsaposmedia.com/uploads/1/3/0/8/130813799/volifuki.pdfIn PDF document text
    • http://files.ebizownersolutions.com/uploads/1/3/1/1/131163867/birozovedaket.pdfIn PDF document text
    • http://mujujakep.augustatnba.com/uploads/1/3/1/0/131070374/rogaragarux.pdfIn PDF document text
    • http://nagejuba.davidgaffney.org/uploads/1/3/0/7/130775735/1e51c00678f2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/9551/1206/files/27842274318.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5122/9089/files/tizisupusuzus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2665/3090/files/mua_nam_linh_chi_o_dau_tot_nhat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcf05fab-6e7b-44b3-9719-ec819a352085/92047031833.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d1d14ed-9d66-44ff-a8ae-c5ea5bcf6542/musawipip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b8080d1-15d0-4328-8b0c-7d874e984093/74274243281.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d353090e-1190-4f80-a2e1-32111fd79740/vapafeniroxigabazode.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6627960b-23f4-4dd0-b5a8-e666a81a0eba/xoxujamak.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004f6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F6C 5424 bytes
SHA-256: 98d833cecf4f3471a545ddca3e9417c1c95f4d8c333c8ee7b50f16f68b576b93
font_01_sfnt_off000061fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61FC 10092 bytes
SHA-256: f7efc80650555ab1d5019c77342d52c3561d60a0304bd27bad33bcca96bc5af4

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