Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec5a151dcd33ceee…

MALICIOUS

PDF

87.8 KB Created: 2021-02-15 08:27:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 037e6397d6c6cfd3d941134a9a8c9ffa SHA-1: 2daf65bdac6e65544e6a46e4ce73f2c4044b341c SHA-256: ec5a151dcd33ceee54ee6c18ce8bf9cecaeb983a7ba559c7e6a2229be0bf6eb2
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to potentially malicious domains, indicating a link farm or phishing lure. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristics point towards the use of JavaScript for malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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/wb?keyword=arverni%20campaign%20guide PDF link annotation
    • https://cdn.sqhk.co/ludozenidi/nwgeuia/45853937975.pdfIn PDF document text
    • https://cdn.sqhk.co/joxutedunik/g7hbifI/sky_force_fighter_mod_apk.pdfIn PDF document text
    • https://panidulupeju.weebly.com/uploads/1/3/0/9/130969186/be45343e1440.pdfIn PDF document text
    • http://gufutaca1.xyz/aur_aahista_kijiye_baatein_whatsapp_status6fogl.pdfIn PDF document text
    • https://dumisoxi.weebly.com/uploads/1/3/4/6/134625223/9619981.pdfIn PDF document text
    • https://popuvagilubasi.weebly.com/uploads/1/3/4/0/134018524/zesefofewi-xafigabadi-lugoraf.pdfIn PDF document text
    • http://jilet2.club/67625191634ksfy7.pdfIn PDF document text
    • http://istlan.space/xazadifelry3i.pdfIn PDF document text
    • http://com-servers.online/maps._me_offline_maps_travel_guides_navigationn6rcx.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473919/normal_5fcc77e7ebfa4.pdfIn PDF document text
    • https://pugefaguza.weebly.com/uploads/1/3/5/2/135299010/1449916.pdfIn PDF document text
    • http://tiktoktop.design/wordly_wise_3000_book_36mejf.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/pesetufavo/mobuvefewalefezodebulij.pdfIn PDF document text
    • https://s3.amazonaws.com/kuxuxemu/rudixafilujugetabezob.pdfIn PDF document text
    • https://s3.amazonaws.com/nunakixuma/ziloleborotemedilogasonut.pdfIn PDF document text
    • https://s3.amazonaws.com/temujonuwu/47393192899.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_off00011ae6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AE6 5232 bytes
SHA-256: ebc939aa75b0da2d8d9b4f3ea9af90b6969f081000307cb8d03df1673281f122
font_01_sfnt_off00012ca4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CA4 10920 bytes
SHA-256: 055eedc5a275a46a8ac431f321f74e9c86beab06821e2667765c2a8fede32dbc

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