Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5e166b8bc49871c…

MALICIOUS

PDF

71.7 KB Created: 2021-02-23 09:26:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: b9743f6e0315fe164f791708f89b9dd0 SHA-1: 554d3824d7f484c72142a0c803148f480c5f5d75 SHA-256: f5e166b8bc49871c0b1e76ca6ad76e4874e2cf801b39e14176ae5b9befe25496
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains numerous external links, a technique often used to create link farms for SEO manipulation or to host malicious payloads. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically a phishing or trojan threat. The embedded URL points to a suspicious domain, likely serving as a lure for a malicious download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://baarspo.ru/wix?keyword=mxq+pro+4k+smart+tv+box+user+manual PDF link annotation
    • https://lamuwopinu.weebly.com/uploads/1/3/4/6/134632291/410434.pdfIn PDF document text
    • https://tiwirekofer.weebly.com/uploads/1/3/5/3/135314588/zubosuragof.pdfIn PDF document text
    • https://ranemexamegen.weebly.com/uploads/1/3/4/4/134440137/56a758899f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486984/normal_5ff29747ac791.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392237/normal_6029298ee5af8.pdfIn PDF document text
    • http://pirawamajakemiv.22web.org/likotubu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413982/normal_6005fee624e11.pdfIn PDF document text
    • https://pulisojoperun.weebly.com/uploads/1/3/4/4/134487891/lanowige.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/tiduro/alvida_ramzan_naat_status.pdfIn PDF document text
    • https://s3.amazonaws.com/xebuvuwov/26634514536.pdfIn PDF document text
    • https://s3.amazonaws.com/leributafa/hakata_station_japan_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jemazejodep/meri_aankho_ka_kajal_song.pdfIn PDF document text
    • http://wujawejibizub.epizy.com/81221441340.pdfIn PDF document text
    • https://s3.amazonaws.com/ravuxudibure/11710477600.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/93320043807.pdfIn PDF document text
    • https://s3.amazonaws.com/lerezazo/clark_forklift_dealer_ontario.pdfIn PDF document text
    • http://duzujowe.epizy.com/answer_phone_on_samsung_s5.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_off0000dbbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBBF 5516 bytes
SHA-256: ed6b84227e0660e1fffde3016631ee35cc541c76d45a131f898103d71064b402
font_01_sfnt_off0000ee89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE89 10316 bytes
SHA-256: 7c9f77ec1d6c4f346c399fc7b1809d29187223fe41c3514e67faa1cfe62b2457

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