Malicious PDF — malware analysis report

Static analysis result for SHA-256 0db02cb7d16348d5…

MALICIOUS

PDF

72.0 KB Created: 2021-02-28 20:43:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: f70f1a24a9024bc07bb6624b5a64cd49 SHA-1: 09eea6f99b8a98bc512f10c3a3ab589d5acd23bb SHA-256: 0db02cb7d16348d594f7fe521083df85c27174fd3b575033ac3b090773223791
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a primary external URI pointing to a suspicious domain ('soxebez.ru') that is likely part of a phishing or scam campaign. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for link farms, further supporting a malicious intent. The ML classifier and ClamAV detection strongly indicate malicious content.

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://soxebez.ru/strik?utm_term=crochet+hat+for+baby+boy PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4413122/normal_5fe36611e27e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387054/normal_6037de5901de4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4503214/normal_5fc6b902bbd82.pdfIn PDF document text
    • https://lezekuzog.weebly.com/uploads/1/3/1/3/131378913/tibegoza-naguwojikumisi.pdfIn PDF document text
    • https://cdn.sqhk.co/mugejufunij/hgwheic/losove.pdfIn PDF document text
    • http://beviluxenumiliv.mywebcommunity.org/que_es_cianuro_de_potasio.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382790/normal_5fedd7434503a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365576/normal_5fd0c2a83ff44.pdfIn PDF document text
    • http://timinome.getenjoyment.net/xefuzewumulukoniwidunoki.pdfIn PDF document text
    • https://biditojutorosas.weebly.com/uploads/1/3/4/6/134657596/jositivufudike_dapuvadiwu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lesefapor.epizy.com/ketiwavuvijur.pdfIn PDF document text
    • http://resilasijajatil.myartsonline.com/why_is_appearance_important_in_an_interview.pdfIn PDF document text
    • https://s3.amazonaws.com/zafaronivaj/navigator_free_maps.pdfIn PDF document text
    • https://s3.amazonaws.com/dalava/buku_membaca_anak_tk.pdfIn PDF document text
    • https://s3.amazonaws.com/sutawowirosuvuv/26100667489.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_off0000de85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE85 4908 bytes
SHA-256: cdae0afd227ce264afdc65741ce30d01b912d8ba8cc5d383f7d8fd6cb58ff50f
font_01_sfnt_off0000ef3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF3E 10596 bytes
SHA-256: 0a3dbd046439020087797d0cb8054aecf1a596a8b0329adacf8686a8c0cad102

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