Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e25eb7a9036b6a0…

MALICIOUS

PDF

71.9 KB Created: 2021-01-15 06:19:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 25b4891416c273a9219bbdca63552b19 SHA-1: 146ed4ab363186a9cb07db0552220c9d8a0f8ce9 SHA-256: 4e25eb7a9036b6a0e1e0b7e156f2d06509934f7f1736a95b0bd1fe9c5c0f65ee
134 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically identified as a link farm on disposable hosting, indicating a malicious intent to redirect users. The ML classifier and ClamAV detection strongly suggest malicious content. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with phishing or malware delivery campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=allodia.+in+dj+song PDF link annotation
    • https://site-1168332.mozfiles.com/files/1168332/10089494330.pdfIn PDF document text
    • https://cdn.sqhk.co/jiguluzufuwa/ieIjfNr/training_department_administrative_assistant_job_description.pdfIn PDF document text
    • https://site-1084247.mozfiles.com/files/1084247/wood_hole_cutter_toolstation.pdfIn PDF document text
    • https://vaxuzumop.weebly.com/uploads/1/3/4/8/134870956/7915552.pdfIn PDF document text
    • https://site-1174838.mozfiles.com/files/1174838/arlette_farge_la_vida_fragil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502464/normal_5fb91e0051520.pdfIn PDF document text
    • https://site-1177540.mozfiles.com/files/1177540/rainbow_dash_coloring_pages_online.pdfIn PDF document text
    • https://site-1175508.mozfiles.com/files/1175508/download_game_downhill_master_mod_apk.pdfIn PDF document text
    • https://site-1177423.mozfiles.com/files/1177423/is_liquid_oxygen_an_element_compound_or_mixture.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471106/normal_5fa47f2700d95.pdfIn PDF document text
    • https://naketutetan.weebly.com/uploads/1/3/4/6/134660231/wesexofanoxades_kixijadeji.pdfIn PDF document text
    • https://cdn.sqhk.co/sujutowupolu/7lI44LL/elite_motors_2_hack.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nademopor/tizek.pdfIn PDF document text
    • https://s3.amazonaws.com/muvojugejoxip/ap_calculus_bc_2019_free_response_questions.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_off0000daef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAEF 4992 bytes
SHA-256: 6d61f306c9a2368f154fe5506d128924e4a19b9f03adc9e86664bba6155e5963
font_01_sfnt_off0000ec06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC06 11604 bytes
SHA-256: fc0c69cb13703a011dac7d55ba59ff659e47ba0f51cee3b7b3ca736bc029ba02

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