Malicious PDF — malware analysis report

Static analysis result for SHA-256 72dd29b05e789ed9…

MALICIOUS

PDF

79.3 KB Created: 2021-06-15 10:15:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 01ebb924a4c1fe101dc2c72fde9d4eed SHA-1: c06937f42cb0d8886ca7a31d165b2cd4594b8746 SHA-256: 72dd29b05e789ed9fad14fb2253c122a205fc297f3e32efd7d314dae3c8ea4ce
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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.
  • 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://wastran.ru/pbw?utm_term=tn+hd+songs+free+download PDF link annotation
    • https://tibesegekor.weebly.com/uploads/1/3/4/4/134495245/8bfa7c88b78a2f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417040/normal_5fe4355ab98c5.pdfIn PDF document text
    • https://gisafumeg.weebly.com/uploads/1/3/6/0/136098567/medibonuminiro_tujewatuni.pdfIn PDF document text
    • https://piwututa.weebly.com/uploads/1/3/4/6/134625425/7150005.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369919/normal_6042ec5d9398d.pdfIn PDF document text
    • https://fubediko.weebly.com/uploads/1/3/1/0/131070718/26189b075.pdfIn PDF document text
    • https://rimesozarabef.weebly.com/uploads/1/3/1/6/131607712/47011a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478703/normal_6011dfcc4b349.pdfIn PDF document text
    • https://xopugexufejan.weebly.com/uploads/1/3/4/7/134709921/robagudof.pdfIn PDF document text
    • https://napolodakuziman.weebly.com/uploads/1/3/0/7/130775867/e0941eec52.pdfIn PDF document text
    • https://xewezepi.weebly.com/uploads/1/3/0/8/130813550/dabefoz_nudigulebonefo_mexubaku.pdfIn PDF document text
    • https://jutijodofolumel.weebly.com/uploads/1/3/4/0/134012985/4738516.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469136/normal_6058eb18772aa.pdfIn PDF document text
    • https://dotejapu.weebly.com/uploads/1/3/4/0/134042906/8737712.pdfIn PDF document text
    • https://vuloribogisoso.weebly.com/uploads/1/3/4/6/134655424/51259.pdfIn PDF document text
    • https://kobuvenaxoz.weebly.com/uploads/1/3/4/7/134762740/vuzemov-foxamerulivine-masuwibijixek.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/0c2e7313-18bf-40e9-86d2-464031a398d5/sozijubajulizepap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bc5cc4b-c4d5-455b-83db-24b3dd9bea2a/how_to_convert_audio_to_midi_in_reaper.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77aafb32-6ffc-4cb5-9f19-6ada0e5b7e8a/43405638554.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56ea4c32-bdbf-4068-a9b0-182d718bfe52/honda_wave_110_alpha_engine_diagram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94772a3c-fd04-4c79-aa3a-f1ab7c82e304/58006660887.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9F8 4868 bytes
SHA-256: df35804dcddb03307e25a41e7f4f30ab2f13b73b9d8c030aa0fff7bdf4aac780
font_01_sfnt_off0000fa82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA82 11580 bytes
SHA-256: eda31e4ea8aa6c75820fef3e9cf044a2ba71ac131b219d6ce5da35d33a9d81b0
font_02_sfnt_off000121da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121DA 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3