Malicious PDF — malware analysis report

Static analysis result for SHA-256 c678c88455e622a5…

MALICIOUS

PDF

74.2 KB Created: 2021-02-21 19:23:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 8a953e616ce7cccdae56d354776ac2db SHA-1: f1191f2fe9987e51444fda017bb6d705fc7c9e5e SHA-256: c678c88455e622a52b1a1be601a5f710872bf14df76a13b5f53ee52e85c78ec6
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a significant number of embedded URLs, with critical heuristics indicating it's a malicious redirector and a link farm. The primary malicious URLs identified are associated with redirecting users to potentially harmful content. The ML classifier and ClamAV detection strongly support the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://crophysi.ru/strik?utm_term=dnd+5e+homebrew+classes In PDF document text
    • https://vufuvato.weebly.com/uploads/1/3/4/7/134718288/mufimenapixepij_setixesupeni_lemirubono_lajomota.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421472/normal_5fcb02dd0f895.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416494/normal_5ffd7c708fa77.pdfIn PDF document text
    • http://bagadiwep.22web.org/fojevip.pdfIn PDF document text
    • http://imm-shoes2.club/13848425451g1arm.pdfIn PDF document text
    • http://dfahsdfgjsfg.online/nesn_bruins_scheduleprxcf.pdfIn PDF document text
    • https://sopoxovolofu.weebly.com/uploads/1/3/4/5/134509961/rirugenonev.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462376/normal_60066013ebb69.pdfIn PDF document text
    • http://wersita.fun/64917118609pa94.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370077/normal_5fce106b49a41.pdfIn PDF document text
    • http://gnatural.space/243658397050iqa9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466173/normal_60209c72b8bd6.pdfIn PDF document text
    • https://salovunuwav.weebly.com/uploads/1/3/0/9/130969923/5347092.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479925/normal_6027c4933ac6c.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/tujeviwakirawu/46007199729.pdfIn PDF document text
    • https://s3.amazonaws.com/vibuvomomuv/mekow.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/november_2018_calendar_printable_template.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_off0000e588.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE588 5532 bytes
SHA-256: 64085a0d95310c845ea165aa362cbfcda970d49b52e39864ebf96031b7d1bb8b
font_01_sfnt_off0000f83f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF83F 10632 bytes
SHA-256: fff3fd252efec0e142959de967dd8cd393c29e3af36918fadd71b7603a51c0d9

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