Malicious PDF — malware analysis report

Static analysis result for SHA-256 163e371d5819e0bd…

MALICIOUS

PDF

58.5 KB Created: 2020-12-16 04:14:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 0ec23c9ac8e898e667e4a9930bb0ed46 SHA-1: 140b40b252642174ad6fc01dc13b2ec834dda2e4 SHA-256: 163e371d5819e0bdfad0d3e7bfeb5f21eda4255174e08350caaa3fb56336d87e
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one prominent URL suggesting a lure related to 'Pokemon go text generator'. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, often used for SEO manipulation or to distribute malicious content. ClamAV detection and ML classification confirm the malicious nature, likely involving phishing or malware delivery via the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffnew.ru/123?utm_term=pokemon+go+text+generator PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368751/normal_5fd6e069ecf50.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466146/normal_5fd660b9b7e63.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391954/normal_5fa5486e3c7ac.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417519/normal_5fc4dc814cfa9.pdfIn PDF document text
    • https://geguromivakof.weebly.com/uploads/1/3/4/3/134332909/dodilagapirevex.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382196/normal_5fc7ee87d20cb.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/vifusupegiza/reliance_infrastructure_limited_annual_report_2017-_18.pdfIn PDF document text
    • https://s3.amazonaws.com/tokudapele/wetarelatubeburoluw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f11cd3e2-5bb7-403a-924f-165fbac955fc/maya_angelou_graduation_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/vogubivajavofu/kezabirefi.pdfIn PDF document text
    • https://s3.amazonaws.com/tomamujuf/votikoxokanusodakeluzegob.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_off0000aaee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAAEE 4928 bytes
SHA-256: 45cace5e574726b3e1487a9b48d8ad0b2b5fbf44899a943502f04a475b77eac7
font_01_sfnt_off0000bba7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBA7 10164 bytes
SHA-256: 38625ff26796cc107f94b2e80d0cf01ae162fdd16fa7ce6ddc66040ead5044b2

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