Malicious PDF — malware analysis report

Static analysis result for SHA-256 54fde203200302cb…

MALICIOUS

PDF

72.4 KB Created: 2021-02-19 22:43:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 03d944e861fabf195ba8012aefbec48e SHA-1: 21dd77f9c7f85fb9a4c2d316496d86792a16157c SHA-256: 54fde203200302cbe25ef74a5e3170d4a52d7a8628100a4d85fddf90c07e551f
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, indicating malicious intent. The PDF contains a large number of embedded URLs, many pointing to disposable hosting, suggesting a link farm designed to distribute malicious content or conduct phishing. While no scripts were explicitly extracted, the nature of the embedded links and the PDF structure strongly suggest it's part of a phishing or malware distribution campaign, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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://bologen.ru/strik?utm_term=graco+crib+screw+size PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4485801/normal_600f2cdf97f1b.pdfIn PDF document text
    • https://ludiwutigavas.weebly.com/uploads/1/3/4/6/134697468/rezipiwifok.pdfIn PDF document text
    • https://cdn.sqhk.co/sewadokoka/heLyjaQ/lokicraft_juego_gratis_para_pc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369775/normal_5fdc3ccd7413c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486552/normal_602088252312d.pdfIn PDF document text
    • http://mizarofu.22web.org/pokuwuxutuxomu.pdfIn PDF document text
    • https://dukifuti.weebly.com/uploads/1/3/1/4/131437117/5685411.pdfIn PDF document text
    • https://nogigeto.weebly.com/uploads/1/3/4/6/134665346/1eb299a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449992/normal_600219cb50c38.pdfIn PDF document text
    • http://mukatadirez.iblogger.org/dreamville_under_the_sun_mp4.pdfIn PDF document text
    • http://nadurejiw.22web.org/36011448030.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417145/normal_6004fe192b107.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424378/normal_602d9710c082a.pdfIn PDF document text
    • https://cdn.sqhk.co/zujijivopuju/huiajc7/guvobukofelexe.pdfIn PDF document text
    • https://cdn.sqhk.co/pemanunid/03hbgd2/99175133545.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gotuziput.epizy.com/best_lightweight_android_browser_2019.pdfIn PDF document text
    • http://simorunobulo.rf.gd/nafar.pdfIn PDF document text
    • http://mewivoxirogowe.rf.gd/chronicle_of_a_death_foretold_movie_trailer.pdfIn PDF document text
    • http://misibinebob.epizy.com/xojatunaxovubu.pdfIn PDF document text
    • http://tepojeno.epizy.com/simefom.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_off0000de4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE4A 5072 bytes
SHA-256: 0e28d72409838219d181ccd0abad1e3fc7271b2effe58b14e15dd07889305f9b
font_01_sfnt_off0000efb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB2 10760 bytes
SHA-256: f36db3f9f075790513a8234eea7a0b5f1e8cf83a05c1bd78d51d68fad42a872e

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