Malicious PDF — malware analysis report

Static analysis result for SHA-256 a575fcb9b75bdec0…

MALICIOUS

PDF

78.2 KB Created: 2021-02-18 20:58:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 6bb76d21d64525ea803acae1aedfc62a SHA-1: ef5ce9c4613cee5e814e13507ae228a1d42534ca SHA-256: a575fcb9b75bdec049a8b8933dc42fd8fca511d9f642043d6559d86cb21d99ec
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure. The heuristic firings indicate this PDF is designed to redirect users to malicious sites, likely for phishing or malware distribution. While no scripts were explicitly extracted, the nature of the PDF and its embedded links strongly suggests an attempt to exploit users through 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/strik?utm_term=harman+accentra+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4387230/normal_602053fc922cf.pdfIn PDF document text
    • http://ryduslim.website/wirafifumilupr2utf.pdfIn PDF document text
    • http://ergors.space/filmic_pro_mod_apk_6._7._7096hc.pdfIn PDF document text
    • http://onlinekartiadesi.com/the_one_book_review_kiera_cassxr5m0.pdfIn PDF document text
    • https://losuwasujiro.weebly.com/uploads/1/3/1/6/131637226/rezatewikewoz_wozugoxoti_bidivobudu.pdfIn PDF document text
    • http://allostar.buzz/97682159581d5b2q.pdfIn PDF document text
    • https://resodarapasak.weebly.com/uploads/1/3/4/6/134659305/nuninutugida.pdfIn PDF document text
    • https://virigegeke.weebly.com/uploads/1/3/2/7/132740897/4272883.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447641/normal_5fd61360c70dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463791/normal_602d06b5d1b9d.pdfIn PDF document text
    • http://iclod.tech/91685655025kt6o.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/loranoduzuja/20759528623.pdfIn PDF document text
    • https://s3.amazonaws.com/xafaxotaful/74811592546.pdfIn PDF document text
    • https://s3.amazonaws.com/fusidejebi/chrome_v_75.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/fema_ics_field_guide.pdfIn PDF document text
    • http://bexufomadixin.rf.gd/bujexulesoz.pdfIn PDF document text
    • http://refuzopil.epizy.com/rokuterakeradomanu.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_off0000f56c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF56C 4728 bytes
SHA-256: 024f19758f08e2e4254afd16acc02c98ba9f82302a85e9f18327e6757a46093c
font_01_sfnt_off00010562.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10562 11072 bytes
SHA-256: 5d211e94d422fc29e9f932a8af2f1c62fd81bdcd50165f7a1d0a48eee6ae1ee8

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