Malicious PDF — malware analysis report

Static analysis result for SHA-256 40c228a4f2485974…

MALICIOUS

PDF

75.6 KB Created: 2021-02-16 12:38:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: ebe08571319bc1e7ae059ef6a46c0022 SHA-1: 57db4c4b45a1b3f3b563cf419b6f787be0932a9d SHA-256: 40c228a4f2485974afbea2f4a549fd8f7dde10a4f0c1a15ad415cb37cdf66165
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, suggesting a link farm or SEO manipulation tactic. While no scripts were explicitly extracted, the PDF structure and embedded URIs point towards potential malicious redirection or content delivery, possibly leveraging JavaScript for execution.

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 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.
  • 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://druttle.ru/wix?keyword=how+to+install+mods+pokemmo+android PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4385848/normal_5ffb94eb44971.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379485/normal_6004b27cd2d25.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383807/normal_5ff7641e76421.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460708/normal_5ff4031db3e97.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455659/normal_5fd6c44e9008d.pdfIn PDF document text
    • https://xofijenafoku.weebly.com/uploads/1/3/5/3/135349300/pagopazux_butolepowubu_duvote_dofavuvod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384640/normal_6011ed4a57bc9.pdfIn PDF document text
    • https://fajizaxaro.weebly.com/uploads/1/3/1/3/131381717/1834997.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393193/normal_60034f6a5cbc3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372399/normal_5fcc52deae1cb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455208/normal_5fefdcc8633b5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462982/normal_5ff76fc08c461.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463810/normal_5ffe6dbc751dc.pdfIn PDF document text
    • https://rezisepadas.weebly.com/uploads/1/3/4/2/134235668/tuwasi_tekaxabax_vivixosajinina_segisena.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418180/normal_5fd67ca2eaa0d.pdfIn PDF document text
    • http://befakupamexi.iblogger.org/langage_des_signes_francais.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465018/normal_5fee1af2d532b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zekakodususebu.epizy.com/82342175362.pdfIn PDF document text
    • http://kimufigekufeta.rf.gd/8931558044.pdfIn PDF document text
    • http://gisesufuxezemud.epizy.com/esophageal_cancer_powerpoint_template.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_off0000e18e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE18E 5220 bytes
SHA-256: 99409a8b573d9beb4d929f83d325424bc98cb279ff6b075aebd84be23c0ce605
font_01_sfnt_off0000f349.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF349 14736 bytes
SHA-256: bf260d7493f678179ee63e279f40a8236849751147ea8c7a9dd3fb7dee4025ee

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