Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac5e26d6c3dc924f…

MALICIOUS

PDF

78.3 KB Created: 2021-06-08 21:14:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ae3005fd532db8dd84dac2aa738bec81 SHA-1: c196e63bd61f9edd05c960fb4f3aa9de7977dfab SHA-256: ac5e26d6c3dc924f862cc431e4f98b828d826989242f44905ddc245e63ef1e83
194 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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • 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://huntic.ru/pbw?utm_term=did+miraculous+ladybug+season+4+come+out PDF link annotation
    • https://ziwarojuwetupo.weebly.com/uploads/1/3/4/3/134343479/ea1624ae426.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469863/normal_60198f1fb312c.pdfIn PDF document text
    • https://linugotozoluj.weebly.com/uploads/1/3/4/6/134662393/kotuzasuxukiz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477139/normal_6051503d91155.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382974/normal_606954fbcaec6.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4479932/normal_60b20f511ff94.pdfIn PDF document text
    • https://jevupatumatawi.weebly.com/uploads/1/3/4/3/134377955/65ba97eb2d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402501/normal_60652a03e3046.pdfIn PDF document text
    • https://zakulupibuwuvos.weebly.com/uploads/1/3/4/6/134686441/wulepilirot.pdfIn PDF document text
    • https://lafikekil.weebly.com/uploads/1/3/4/3/134316660/6247292.pdfIn PDF document text
    • https://kakizizutubune.weebly.com/uploads/1/3/4/3/134351089/moganagid.pdfIn PDF document text
    • https://regifedemez.weebly.com/uploads/1/3/1/4/131406591/fadipesikop.pdfIn PDF document text
    • https://bususofewibuju.weebly.com/uploads/1/3/5/3/135329568/3062848.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474752/normal_60369f1d18d03.pdfIn PDF document text
    • https://movakesomerinid.weebly.com/uploads/1/3/4/5/134528648/2839283.pdfIn PDF document text
    • https://bizitaninajoki.weebly.com/uploads/1/3/5/3/135316521/4112379.pdfIn PDF document text
    • https://fewugoxozo.weebly.com/uploads/1/3/4/4/134441687/zowum.pdfIn PDF document text
    • https://gunubamevozapub.weebly.com/uploads/1/3/3/9/133997290/gubapetuxasu_dejaxomipu.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/2b6bebf1-a71e-47c8-977f-f34ee5945d24/john_deere_725_engine_series_190cc_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1988543-da55-41da-895a-690c8120ee33/libro_azul_2019_mexico_gratis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6f31245-70ae-4dba-9ed2-7ed4b1e3026d/python_set_environment_variable_windows_10.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_off0000f190.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF190 5588 bytes
SHA-256: 17549c7d4dea1364c80ea109e7b6bcccdba7e8c9e735fb15657b74a6d8f5a33c
font_01_sfnt_off00010492.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10492 12064 bytes
SHA-256: 31130c913fcececab0c1279b2f8e79b46e67ad54201d37efbdcb42be6869e712