Malicious PDF — malware analysis report

Static analysis result for SHA-256 e671b6247222ec8a…

MALICIOUS

PDF

76.6 KB Created: 2021-02-12 13:41:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 7c8c6c2dfec40066ec19fec586760792 SHA-1: b68a59f226e59cb2a1b1fc6858ff34ff684dec9c SHA-256: e671b6247222ec8a2cabd889e96900f1f49bae12175272546b2b9e5a1b45e051
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to disposable domains or cloud storage, suggesting a link farm or SEO manipulation tactic. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of numerous external links and the nature of the PDF heuristics suggest it is designed to redirect users to potentially malicious content, possibly for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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=vamos+rent+a+car+costa+rica PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4383917/normal_60155b53bc605.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445889/normal_600f07dbcb0c3.pdfIn PDF document text
    • https://derufobi.weebly.com/uploads/1/3/2/6/132682106/fusajibal_niximoziba_sakit.pdfIn PDF document text
    • https://cdn.sqhk.co/tilafukefuwe/TwjfieS/16192310475.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496146/normal_6002d17268db1.pdfIn PDF document text
    • https://cdn.sqhk.co/vowobupubuze/icjhsV4/10564236879.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369651/normal_5ffce1a159b18.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485301/normal_600a2650608aa.pdfIn PDF document text
    • http://nawogevimogagu.22web.org/voboduzazopumizu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375698/normal_5fd868589f8de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445731/normal_600d243240fa4.pdfIn PDF document text
    • https://vavaxomutiposev.weebly.com/uploads/1/3/0/7/130738712/3384561.pdfIn PDF document text
    • https://cdn.sqhk.co/kopuzeginev/FiWNogc/pinkfong_car_town_mod_apk.pdfIn PDF document text
    • https://nuvisinuxaxo.weebly.com/uploads/1/3/1/3/131383681/nepukomonu.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/saziwijaxodav/vosativatab.pdfIn PDF document text
    • http://zewipurorafe.epizy.com/fukaragijufigifupeduj.pdfIn PDF document text
    • https://s3.amazonaws.com/topipovikapari/loxavom.pdfIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/variso.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_off0000ed7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED7E 4876 bytes
SHA-256: 9d78942852623e9f8e93afaf0e982446185f0b73d8bfdbb62f1bf283c9ed82d9
font_01_sfnt_off0000fdff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDFF 10968 bytes
SHA-256: 18700b962e24cd89d782ff7007ce95b4c220d79ab207de1b7010f1bc534b7a80

Open this report in the interactive analyzer, or submit your own file for analysis.