Malicious PDF — malware analysis report

Static analysis result for SHA-256 31fecc3576dc40a5…

MALICIOUS

PDF

147.4 KB Created: 2021-03-23 07:37:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: e08fd3b45fd9475d204b71c00e78d19a SHA-1: 38eacc82d95f1f5e49bfeb83968a108dc41d84f5 SHA-256: 31fecc3576dc40a5ef38bc401c02120485908eec80ea44921e8ff0d2531fb97f
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically pointing to a domain that appears to be a link farm designed to redirect users. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high likelihood of malicious intent, likely to distribute phishing content or malware. The ML classifier and ClamAV detection further support the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://gimoguvi.ru/award?keyword=afc+asian+cup+uae+2020+match+schedule+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4372985/normal_603ce52b33a6b.pdfIn PDF document text
    • https://jozufibajas.weebly.com/uploads/1/3/0/9/130969385/wekozu.pdfIn PDF document text
    • http://zajiledafalam.getenjoyment.net/23513185744.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376380/normal_5ffbb8cad66dc.pdfIn PDF document text
    • http://derilezin.sportsontheweb.net/talebupapekebovofuv.pdfIn PDF document text
    • https://gavuwexis.weebly.com/uploads/1/3/4/7/134772394/damiril_tusivavu.pdfIn PDF document text
    • https://lepoboniw.weebly.com/uploads/1/3/0/9/130969744/baroj.pdfIn PDF document text
    • http://sabovibin.medianewsonline.com/how_to_install_sirius_radio_car_kit.pdfIn PDF document text
    • https://gejomomik.weebly.com/uploads/1/3/4/7/134719116/e07c8818484.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459796/normal_5ffd037de9960.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374373/normal_603d10cf71638.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://belibivizonojo.myartsonline.com/physics_important_formulas_for_neet_2019.pdfIn PDF document text
    • http://zagupijalixi.myartsonline.com/64373057439.pdfIn PDF document text
    • https://s3.amazonaws.com/xuvamuba/ludisamotodorolitaxadase.pdfIn PDF document text
    • https://s3.amazonaws.com/wupixufekijax/limehouse_blues_lead_sheet.pdfIn PDF document text
    • https://45ae50e1-98a8-4501-9ad6-fc0df438eb43.filesusr.com/ugd/b16523_37ad9861ab1f4e4e8d898a89e7ebeb10.pdf?index=trueIn PDF document text
    • https://f8e303d0-f350-43d2-b7c3-f886ef13ec25.filesusr.com/ugd/1bb397_f156192f2c9240d5852710b286f10945.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gofilafixu/47412724411.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_007_off000210af.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x210AF 24656 bytes
SHA-256: 78b37cd0ce9ff6f65e6a4ada1fd546fc077ee7622b5ca3f9760abb0ae2233603
font_00_sfnt_off0001c3e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C3E8 5560 bytes
SHA-256: 9993af074e24ea85ab619189711a544faddc802007218f3baceb887ab667145e
font_01_sfnt_off0001d6ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D6AC 2464 bytes
SHA-256: 3b8f614f36db3e5e655725f5e8002de33ff0500796215b9a8fcb2dc3e0471c6a
font_02_sfnt_off0001e071.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E071 16344 bytes
SHA-256: 99b34999214fa3222e1d4267334feac16a0edb9cb849c23f0da6585785ab484e

Open this report in the interactive analyzer, or submit your own file for analysis.