Malicious PDF — malware analysis report

Static analysis result for SHA-256 0174afc2b24e0810…

MALICIOUS

PDF

71.6 KB Created: 2021-02-24 21:44:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 6d0d238f88f9daa2ffc8561288d07a2e SHA-1: f4688ad7e5b5a43adc27d768d8682e9b690f1a84 SHA-256: 0174afc2b24e0810f9ddae5639daa719955d5692e591c7fc1bc369cb87a55853
194 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicative of a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external URIs suggest it's designed to lure users to external sites, potentially exploiting vulnerabilities or delivering further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://bologen.ru/wix?keyword=allen+roth+santa+ana+ceiling+fan+manual PDF link annotation
    • https://cdn.sqhk.co/resozasevej/tgiwjj3/mini_golf_challenge_show.pdfIn PDF document text
    • https://cdn.sqhk.co/mawejoxejobe/iaZghf7/3098303651.pdfIn PDF document text
    • https://cdn.sqhk.co/fulaxanew/hhjUohd/milibubopad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369302/normal_601783721b502.pdfIn PDF document text
    • http://tevajevidiwa.22web.org/vebonotifupusoxopa.pdfIn PDF document text
    • https://wipusometava.weebly.com/uploads/1/3/4/8/134846349/2982735.pdfIn PDF document text
    • https://cdn.sqhk.co/dezorevukor/qhbuSjh/rakaxirudujesupo.pdfIn PDF document text
    • https://cdn.sqhk.co/tulotunofuz/eLLPjf2/star_fashion_designer_apk_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/biposuba/eieLiay/popunuridaranozilupoj.pdfIn PDF document text
    • http://fesotisifofil.mygamesonline.org/dijasajuvipofu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zetamox.epizy.com/avengers_assemble_s4_episodes.pdfIn PDF document text
    • http://devisufuxuvit.epizy.com/47769044982.pdfIn PDF document text
    • http://wuwezimuluf.rf.gd/14130363026.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_off0000d77b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD77B 5284 bytes
SHA-256: 2a671ac52080b02afa541ba9181acf85af7e10549525f752e8b43d342f005760
font_01_sfnt_off0000e94b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE94B 12756 bytes
SHA-256: e58ba196e6183dc5741dd68d25a18611f2137960b826609e0002cb1322326f2d

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