Malicious PDF — malware analysis report

Static analysis result for SHA-256 d58e7373dbec3261…

MALICIOUS

PDF

71.7 KB Created: 2021-02-16 21:33:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 5696c4fe5b55620f74105b6f07898009 SHA-1: 14befca2ba4258427b61def1363d2ff5d7492728 SHA-256: d58e7373dbec326199c25c9105aee699d854706379df2b3cb4b57a0275417895
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • 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://crophysi.ru/strik?utm_term=la+culpa+es+de+la+vaca+1+pdf+descargar PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4469863/normal_6001e22523907.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368474/normal_5fedf776563d1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389792/normal_5fe4a45677678.pdfIn PDF document text
    • https://lajexupizad.weebly.com/uploads/1/3/0/7/130775806/zivubipejifaxujofaka.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443357/normal_5ffdae0e8e289.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444875/normal_5fdd616ef3def.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378608/normal_601f996ecebc9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379732/normal_5fe1299b74d8c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418184/normal_5fcd43d8de2d9.pdfIn PDF document text
    • http://gexafozo.22web.org/ph_e_o_meio_ambiente.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zetulinug.rf.gd/xesunejaparadel.pdfIn PDF document text
    • http://jufakoxageponuz.rf.gd/manualidades_para_nios.pdfIn PDF document text
    • http://xasonivuk.epizy.com/jobsdb_compensation_benefits_survey_report_2018.pdfIn PDF document text
    • http://fomigidaxek.epizy.com/35433797353.pdfIn PDF document text
    • http://bajofot.epizy.com/poziwuwurawibobeduvinejaj.pdfIn PDF document text
    • http://lutesugobomo.epizy.com/69636073919.pdfIn PDF document text
    • http://gexaforagugozen.rf.gd/15219064940.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_off0000d01b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD01B 5376 bytes
SHA-256: 8748440fa8e52707295490bebe6a9a4c2d3518fe0d019846ddf9859ffae1ac34
font_01_sfnt_off0000e285.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE285 14884 bytes
SHA-256: b1e0fed94e8fc872a78f5f0d13864be7e3e1f3cb36d23ad370a54e3f4be93800

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