Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b9fb2409229f7c4…

MALICIOUS

PDF

71.5 KB Created: 2021-05-22 22:06:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 155ec3fa636fbda41efc73583b2f0b45 SHA-1: 72bf4918ff2073960ceff0b97bffa07d73730410 SHA-256: 5b9fb2409229f7c48b2d8a7bd055264eeaa7d11905d0229262c82dfb89ad91a4
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document body, though partially garbled, suggests a lure related to a 'Solucionario de baldor henry sanchez pdf'. The presence of numerous external URIs, many hosted on disposable domains, points towards a phishing or malware distribution scheme. The primary malicious URL identified is https://soxebez.ru/strik.

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 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=solucionario+de+baldor+henry+sanchez+pdf PDF link annotation
    • https://meboguvogo.weebly.com/uploads/1/3/1/4/131437667/tuviri-riziwogarava.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447658/normal_601a484332ad6.pdfIn PDF document text
    • https://gimiduti.weebly.com/uploads/1/3/4/7/134711596/nojusemotej_kikagetivil_tozawugabirawek.pdfIn PDF document text
    • https://jaxudapunu.weebly.com/uploads/1/3/4/7/134748073/6c846da37.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382621/normal_6008f509e6d31.pdfIn PDF document text
    • https://jobemorisawelav.weebly.com/uploads/1/3/4/1/134108772/7267643.pdfIn PDF document text
    • https://gilinolejokakis.weebly.com/uploads/1/3/4/6/134632374/1426312.pdfIn PDF document text
    • https://gekitudofu.weebly.com/uploads/1/3/4/4/134403565/3192181.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408589/normal_6016001e22dc8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384026/normal_5fe9808457c15.pdfIn PDF document text
    • https://sijudunewofas.weebly.com/uploads/1/3/4/6/134696620/7e2c8e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420902/normal_6045ee828ddee.pdfIn PDF document text
    • https://nufodovepitad.weebly.com/uploads/1/3/4/7/134718778/c95a03052dc.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/8fdeb0da-38fb-4860-a26b-0252dfd9ceaa/61060192752.pdfIn PDF document text
    • https://s3.amazonaws.com/nelizenejakarug/att_moto_g6_play_specs.pdfIn PDF document text
    • https://s3.amazonaws.com/kujesulad/65971360889.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb91b3f9-7e2d-4626-aa1e-684e8bdc4d95/mavolujogazedejekenumanif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd8920a9-8f67-45da-b843-604aa654a5a3/vofagabobeb.pdfIn PDF document text
    • https://s3.amazonaws.com/wezukep/jirodo.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_off0000d343.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD343 5640 bytes
SHA-256: 4ae51f9c74ce7d70cff583b6ed663ad852aeb639ed7ed87b3516f6826055100a
font_01_sfnt_off0000e672.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE672 12260 bytes
SHA-256: 35bb9a157ec69b97d5b3bd6fae152b7147a08863853f5026ecdbdd9d786d11e5

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