Malicious PDF — malware analysis report

Static analysis result for SHA-256 263eae043f8b52c1…

MALICIOUS

PDF

69.3 KB Created: 2021-02-22 09:39:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: c1fb750612989370a7c03d93da838fbf SHA-1: bd7982eabaa8b2a46d0ef501ed8c60bf83086720 SHA-256: 263eae043f8b52c1598cfc8b50d5c1161cf9e18832bb37871bbb6a52bd609644
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous URLs point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/wix?keyword=call+of+duty+mobile+trick+shots PDF link annotation
    • http://wetikufuwigiwox.iblogger.org/27847059509.pdfIn PDF document text
    • https://duzopuxezofuj.weebly.com/uploads/1/3/1/3/131382696/8778950.pdfIn PDF document text
    • https://ledimame.weebly.com/uploads/1/3/5/3/135306483/37b255a0.pdfIn PDF document text
    • https://gugabezari.weebly.com/uploads/1/3/4/5/134577353/josafowoxubusa.pdfIn PDF document text
    • http://juxeribitu.iblogger.org/85515864293.pdfIn PDF document text
    • https://gepobuxew.weebly.com/uploads/1/3/1/0/131070920/0c152.pdfIn PDF document text
    • https://kenemujawov.weebly.com/uploads/1/3/4/6/134645985/xevujopog.pdfIn PDF document text
    • http://zigorukap.iblogger.org/vuzasizuxes.pdfIn PDF document text
    • https://tivepikilusu.weebly.com/uploads/1/3/4/7/134759048/37d2e.pdfIn PDF document text
    • https://budojidotepaso.weebly.com/uploads/1/3/5/3/135312143/7c7d9b9.pdfIn PDF document text
    • https://viferoxabuged.weebly.com/uploads/1/3/4/2/134235394/nujukijasejuwu.pdfIn PDF document text
    • https://sakuvajavabese.weebly.com/uploads/1/3/1/3/131383602/8976314.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/jesidofefe/58512158703.pdfIn PDF document text
    • http://buzumevaro.rf.gd/can_i_edit_text_in_paint.pdfIn PDF document text
    • https://s3.amazonaws.com/bisazabe/68849930615.pdfIn PDF document text
    • http://lulovijolezon.epizy.com/8672661466.pdfIn PDF document text
    • https://s3.amazonaws.com/senodiw/79236130769.pdfIn PDF document text
    • https://s3.amazonaws.com/vizegemawokaxe/bus_stop_marathi_movie_filmywap.pdfIn PDF document text
    • http://mawabubobiniz.rf.gd/ashes_cricket_2009_wii_iso.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_off0000d36f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD36F 5472 bytes
SHA-256: 97d7b75d0386db75f774fb299b88ec00edd2c72892d1b442345f088c69485fb2
font_01_sfnt_off0000e5e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5E5 9928 bytes
SHA-256: 2731ee7563a219bb436b047da97140c52dd7c793e5f84c7e8df4685482e3945e

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