Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ed6aa2a7b25a081…

MALICIOUS

PDF

78.1 KB Created: 2021-05-21 15:49:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 85a90bb95588ef2aabf400087c55e6ec SHA-1: c9d8c1b199afaf02bef698cb33d481bdf30faae6 SHA-256: 4ed6aa2a7b25a0819145801a96832c702d86e87a9c3fb3497a8cf9daa904530f
164 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for PDF_SEO_LINK_FARM, indicating it is part of a link farm designed to distribute malicious files. The embedded URL 'https://pelibifir.ru/strik?utm_term=traffic+moto+3d+mod+apk+download' is likely the primary download lure. ClamAV also detected this file as 'Pdf.Phishing.Trojan'. The document body, though heavily obfuscated, contains text related to downloads, reinforcing the phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • 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://pelibifir.ru/strik?utm_term=traffic+moto+3d+mod+apk+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4413457/normal_5fe4d34fa9f99.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477386/normal_606a0a8d13c4d.pdfIn PDF document text
    • https://tifobavojosimiz.weebly.com/uploads/1/3/4/5/134505066/550138.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462697/normal_6047edc42487e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421460/normal_60228cbb31cb0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475741/normal_60551e27952aa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496146/normal_5ff5bdef0ae07.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501380/normal_5fe233ff758e3.pdfIn PDF document text
    • https://pogixadajunoje.weebly.com/uploads/1/3/4/6/134661749/nututudepo_sinidofedemepek_gideka_fopekalizefako.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456686/normal_602a76d0d2828.pdfIn PDF document text
    • https://pavofadibap.weebly.com/uploads/1/3/4/3/134370944/xukuku.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417140/normal_5fd8feb4d1a52.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486748/normal_600ae62472986.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/zonivezada/39457149930.pdfIn PDF document text
    • https://s3.amazonaws.com/zakunafu/salesforce_lightning_reports_vs_classic.pdfIn PDF document text
    • https://s3.amazonaws.com/wufujudisu/rokufetovanegekirafene.pdfIn PDF document text
    • https://s3.amazonaws.com/wibadinavosunom/vuterikeritumapuwixikut.pdfIn PDF document text
    • https://s3.amazonaws.com/pazatuv/wexixawosenejapidepo.pdfIn PDF document text
    • https://s3.amazonaws.com/lolaritemukole/4_as_protocol_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/xeponodij/wisodovuf.pdfIn PDF document text
    • https://s3.amazonaws.com/widetunipet/forms_needed_for_k1_adjustment_of_status.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_off0000e61b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE61B 5392 bytes
SHA-256: 429d60c296a5f6292e97886e115c899cf85edd73e464fd17fb1ba2a8621bfe7b
font_01_sfnt_off0000f875.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF875 21808 bytes
SHA-256: c6963feebb69e4a5b4664f94953052bfd0c589a1405811f352dca543e224ce9b

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