Malicious PDF — malware analysis report

Static analysis result for SHA-256 f25bb9e2a9cc8ebd…

MALICIOUS

PDF

74.5 KB Created: 2021-03-03 02:03:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: e51a411c4dba057c41e9fb7ba0048081 SHA-1: d7905f87d14708df2a58baec7a0ec0f0f7b1351a SHA-256: f25bb9e2a9cc8ebd36b4193926f0ffd159263e9b984a817d57f6426658926cf0
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, with a prominent one leading to a link farm offering 'free spell casting services'. This heuristic, combined with ML and ClamAV detections, strongly suggests a phishing or scam attempt. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious intent, likely to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://seumenha.ru/wix?keyword=free+spell+casting+services PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4403679/normal_602c3add193db.pdfIn PDF document text
    • http://coins24h.com/rezo_del_rosario_misterios_gozososo7wgv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447263/normal_5fe9d06e67f41.pdfIn PDF document text
    • https://cdn.sqhk.co/zaviresodew/uNzhhwg/lekefusijabilel.pdfIn PDF document text
    • http://doordash.fun/baaghi_2016_full_movie_downloadk1vt0.pdfIn PDF document text
    • http://copyright-security-ig.com/xakamiloxakezov6w08.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dovagoxaluzof.rf.gd/19646585050.pdfIn PDF document text
    • https://s3.amazonaws.com/fizaxo/69355168512.pdfIn PDF document text
    • https://s3.amazonaws.com/fajujiju/68348941376.pdfIn PDF document text
    • http://fijivenuzamiw.rf.gd/35227533820.pdfIn PDF document text
    • http://vebujameja.rf.gd/tedibo.pdfIn PDF document text
    • http://rozabakesolunu.rf.gd/alif_novel_episode_4_free.pdfIn PDF document text
    • http://mulexotuvatago.epizy.com/age_of_empire_2_hd_mac.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_off0000e798.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE798 5116 bytes
SHA-256: 484fc85af1e80d984727da83a9848a244b0cbd311e3015e30314d92cd7e93bee
font_01_sfnt_off0000f920.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF920 10476 bytes
SHA-256: 34dbcfdc486c13932e5a547c324ff9931750d94e8007e249209c5affd95d252b

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