Malicious PDF — malware analysis report

Static analysis result for SHA-256 febe5f78f685b8f9…

MALICIOUS

PDF

72.0 KB Created: 2020-12-24 17:23:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 30123553c863a35a018383fa8fd11321 SHA-1: da5fa608bdcd1711d7decb01b1f4a07025c015f5 SHA-256: febe5f78f685b8f935f15725460bf2a0aae35ba0d657ad9f91bbb43e92ef9240
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to PDF files hosted on file-sharing services, suggesting a link farm or distribution mechanism. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards an attempt to redirect users to malicious sites, likely for malware distribution or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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.
  • 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://trafffi.ru/123?utm_term=calendario+escolar+ciclo+escolar+2015+y+2016+sep PDF link annotation
    • https://watowerapomos.weebly.com/uploads/1/3/0/7/130775357/rumufoximasagoninob.pdfIn PDF document text
    • https://cdn.sqhk.co/fabupiguboxa/ajgIhbi/pobefila.pdfIn PDF document text
    • https://wisixujedos.weebly.com/uploads/1/3/4/7/134732494/tulozazigora-forin-zatam-pelogukujumem.pdfIn PDF document text
    • https://sugulidan.weebly.com/uploads/1/3/4/5/134508933/romoxixeto.pdfIn PDF document text
    • https://sevafigetof.weebly.com/uploads/1/3/4/9/134902911/ronem.pdfIn PDF document text
    • https://cdn.sqhk.co/podadoxafa/bbhjrIw/crazy_burger_recipes.pdfIn PDF document text
    • https://puzomukasudugun.weebly.com/uploads/1/3/4/8/134865935/zugafemezigosemat.pdfIn PDF document text
    • https://cdn.sqhk.co/ripigopes/ihJgigc/revefor.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/18f66f47-a0fc-4c2e-95ad-3538e89f5daa/download_fast_and_furious_5_full_mov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eead3dac-1824-4701-a585-d8a721da8815/96909544211.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6d20db5-0666-44f9-b3e3-367a0aed479d/xuporuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/606e228f-8b63-412a-a331-cf51883f5c4e/burning_ring_of_fire_johnny_cash_lyrics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/954aced2-b40f-49aa-9732-605ffb9cdc67/feputufapateg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c44dec48-f3b0-45ed-9008-3c7db0d9f318/sobuwu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f89cbdde-5209-44c3-b51f-07a561031cf5/lexetaloge.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_off0000da45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA45 5680 bytes
SHA-256: 38cf7c99c18cc39b01bf8a4873eed20ae04d288ea007ed685ccf9e0bb381c968
font_01_sfnt_off0000edab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDAB 10788 bytes
SHA-256: fa7bb79227a192615ab5ee1be8b17b8e792764bc4981c27c6c01cf5a0197b7c1

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