Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c3f040aab308ad8…

MALICIOUS

PDF

81.5 KB Created: 2021-03-04 08:17:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: a1e7c027dd4c97aa4f1a263908aa88b2 SHA-1: 966e1899fcc90043a825f944c522be63d3278c67 SHA-256: 9c3f040aab308ad8742d21f13aa5a2a023f3772ea709b98c4bbddceba10cd6c1
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially harmful content. The presence of embedded URLs and the overall structure point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jottigo.ru/strik?utm_term=aircare+5d6+700+evaporative+humidifier+filter PDF link annotation
    • https://tadizusojad.weebly.com/uploads/1/3/2/7/132712436/3762418.pdfIn PDF document text
    • http://jetaxopavajuluw.22web.org/best_site_to_mac_games.pdfIn PDF document text
    • https://rikumuxazomibib.weebly.com/uploads/1/3/6/0/136082685/4f327ebb0719c0.pdfIn PDF document text
    • https://daliroxemonove.weebly.com/uploads/1/3/0/7/130775241/pelunokodexaweves.pdfIn PDF document text
    • https://viwajojavejad.weebly.com/uploads/1/3/1/8/131858172/fesijetugisas.pdfIn PDF document text
    • https://razosuxox.weebly.com/uploads/1/3/4/7/134719946/sexux.pdfIn PDF document text
    • https://fofirajajamide.weebly.com/uploads/1/3/4/6/134643930/6386240.pdfIn PDF document text
    • https://tadivibudup.weebly.com/uploads/1/3/4/8/134899420/30c88a74d.pdfIn PDF document text
    • https://cdn.sqhk.co/rutunidosaw/FgiiiRo/40943733495.pdfIn PDF document text
    • http://site-shop.xyz/darapegugogebbs128.pdfIn PDF document text
    • https://moduruwili.weebly.com/uploads/1/3/2/7/132710657/9742c930a05.pdfIn PDF document text
    • http://ketotreno.buzz/turnitin_free_download_full_versionfbha8.pdfIn PDF document text
    • https://cdn.sqhk.co/wefadegese/9ngdPic/super_brawl_universe_apk.pdfIn PDF document text
    • https://guvopizap.weebly.com/uploads/1/3/0/7/130776702/aa5a3.pdfIn PDF document text
    • https://cdn.sqhk.co/livukigelo/d1M27Nd/sony_50_inch_1080p_tv.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/sirilagewuga/the_pleasure_trap_download.pdfIn PDF document text
    • http://xavisijividefo.epizy.com/mobivaxemawewelorexuti.pdfIn PDF document text
    • http://rozibata.epizy.com/vinudeguv.pdfIn PDF document text
    • https://s3.amazonaws.com/wulotugadag/47479822058.pdfIn PDF document text
    • https://s3.amazonaws.com/gixawetopoli/area_of_triangle_using_sine_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/rivasawunol.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f275.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF275 2980 bytes
SHA-256: eabbf5e7683beaae3a353ba6ed701b9c44c8f1e3ebc01f43db0e8c4bd780c2d3
font_01_sfnt_off0000fd18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD18 5768 bytes
SHA-256: 0cf6cb62b65fc076dfc3a49eec0bb51448dfb7cdfc9a70098965b1309d1bff95
font_02_sfnt_off000110a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110A1 11460 bytes
SHA-256: e3b01afe32eea94d8c3945ada1b1bf949bb05a70fc5ac4fbfb737e71a0c18596

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