Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcca90798544e01a…

MALICIOUS

PDF

85.8 KB Created: 2021-02-27 00:42:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 9fa7cd1444990e383ac8832df190690d SHA-1: 288abe2a303cf25fdde10f5325313f53436fa3f0 SHA-256: bcca90798544e01ac06094ede88bc80d544bfafe37bb64d3690e740ed7f101e1
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the PDF structure and embedded URIs are indicative of a lure to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://pelibifir.ru/strik?utm_term=cycleops+fluid+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4452599/normal_5fd178538d0c6.pdfIn PDF document text
    • http://idealica-italiaofficial.site/japomijebabixur7ozte.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377679/normal_6039533c6b5e7.pdfIn PDF document text
    • https://cdn.sqhk.co/wazuzofi/hdhjaCN/97040043869.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403121/normal_5fd1d3882df37.pdfIn PDF document text
    • https://cdn.sqhk.co/wugunifikezu/23aQypP/mini_golf_world_championship_hastings.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490720/normal_601a0f613d1ae.pdfIn PDF document text
    • http://letuxegesilem.iblogger.org/bojonanupimasobolikiso.pdfIn PDF document text
    • http://help-feedback-amzn6.xyz/rcog_guidelines_for_gdm_2017k8lr0.pdfIn PDF document text
    • http://alphabitx.com/how_to_use_senco_nail_gunke26b.pdfIn PDF document text
    • https://cdn.sqhk.co/tigixexaxi/Eib9gc1/google_translate_french_to_english_take_a_picture.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://veruzixiki.rf.gd/72229772471.pdfIn PDF document text
    • http://vinetewexe.epizy.com/kolin.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubifirigevi/18368562389.pdfIn PDF document text
    • http://velododitimof.rf.gd/what_your_culture_mean_to_youtube_comment_is_highlighted.pdfIn PDF document text
    • http://wutopow.epizy.com/dogovekarobobusap.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_off00010771.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10771 5212 bytes
SHA-256: 1aa714dca22b0f96b2dec4832ddefe02ca73318746cd8a2983a2bc5759b18a69
font_01_sfnt_off00011923.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11923 2364 bytes
SHA-256: 9accc5075ac1f56acf88ae4253eba01804559710124517eccebb7b7e343e44e8
font_02_sfnt_off00012358.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12358 11844 bytes
SHA-256: 79690103fa319222d20adbdaeab625cc1b99bca55c2e1cb34dd4dd96a30c9d99

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