Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc1232ece9651c10…

MALICIOUS

PDF

78.0 KB Created: 2020-12-27 19:48:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 1790869e2643aeef18e249a9ba344bba SHA-1: ab83a3ccaa48a20645ea5b290d6ec2085b6868f2 SHA-256: fc1232ece9651c10ea60d7c4cf1281f956622f5b12b24692bd06a6f95b61a235
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically as a phishing or trojan distribution attempt. It contains a large number of external links, many pointing to PDF files hosted on services like Weebly and F-static, suggesting a link farm or redirection mechanism. The primary URL, 'https://trafffe.ru/strik?utm_term=pregnancy+week+by+week+belly+progression+triplets', is likely used to redirect users to malicious content. No scripts were extracted, but the PDF structure itself is used to host and present these malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://trafffe.ru/strik?utm_term=pregnancy+week+by+week+belly+progression+triplets PDF link annotation
    • https://tiluzapibijodok.weebly.com/uploads/1/3/4/2/134265907/fokebamezi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390350/normal_5fb9a6819c5b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453721/normal_5fd8f3efde9e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463263/normal_5fd98fbd4758c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409806/normal_5fa002713602f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381748/normal_5fac3edace40e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366000/normal_5f8714b03d785.pdfIn PDF document text
    • https://duxakezise.weebly.com/uploads/1/3/4/7/134713437/3715218.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478133/normal_5fc65f35eb2a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450158/normal_5fc2165c147f3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e836.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE836 5500 bytes
SHA-256: 57982a4dd8a128f11985ea91c44197e181c3e16f0a2a63da1aa609011961f456
font_01_sfnt_off0000fb14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB14 3720 bytes
SHA-256: 6539b129c5cd894636dc8f40f53a156c00c8f46378ab4f137c96d687a1cff6ed
font_02_sfnt_off00010677.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10677 10544 bytes
SHA-256: 42105f57297dfa43dc7ef3d472406d91898d8f38e792ba822208fbadc4b26d94

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