Malicious PDF — malware analysis report

Static analysis result for SHA-256 36df7af14c4117a5…

MALICIOUS

PDF

105.5 KB Created: 2021-02-23 13:05:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: ff76dfc7f740779dd201883fe5ed6409 SHA-1: ae617ddd31b9802716daa226728f787a3a9da9ae SHA-256: 36df7af14c4117a5a261a99462cf5d8ee46e2f597a8acc7d544e9fd3c678dfd8
214 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical finding for a redirector link and a PDF link farm. The presence of numerous embedded URLs, such as https://yafferge.ru/123?utm_term=polaroid+sx-70+camera+bag, strongly suggests a phishing or malware distribution attempt. The ML classifier also provided a high confidence score for maliciousness.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/123?utm_term=polaroid+sx-70+camera+bag In PDF document text
    • https://cdn.sqhk.co/ferobisuw/2CWFngf/94789241575.pdfIn PDF document text
    • https://cdn.sqhk.co/josurowelimu/bBl7hjM/2020_election_dates_massachusetts.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375700/normal_600562ad0dac7.pdfIn PDF document text
    • https://cdn.sqhk.co/tugitajusow/ifjeuif/44367563957.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451737/normal_5ffa78ef289e5.pdfIn PDF document text
    • https://xazepobuzu.weebly.com/uploads/1/3/4/5/134582826/xaduxozujosuk-meviromexop.pdfIn PDF document text
    • https://cdn.sqhk.co/xaveredero/h7pgeMd/press_to_push.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426945/normal_60257007eb65a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411500/normal_5fdd09fec3e7d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479707/normal_5fdd326fae835.pdfIn PDF document text
    • https://gupufema.weebly.com/uploads/1/3/4/4/134456882/2298289.pdfIn PDF document text
    • https://cdn.sqhk.co/nozelenid/gQuEjpj/tip_top_nails_medford_nj.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016087.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16087 5720 bytes
SHA-256: ba3276ba691a363032684baa31846953282325c82096f83ebef0cb166e3bc6e9
font_01_sfnt_off000173f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x173F5 10776 bytes
SHA-256: 936c709ce232aa7b01dba179a96b8d6b7fe651c4d7f3fd70570fb500300862cc

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