Malicious PDF — malware analysis report

Static analysis result for SHA-256 9687af8f99b96d77…

MALICIOUS

PDF

72.9 KB Created: 2021-02-19 03:32:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: ac7835d302b544b98545612a20aa5304 SHA-1: 396ba2d839c93f1d40d719d2dddd2e686e0a0715 SHA-256: 9687af8f99b96d77457701da0bec820a3a5860aa291005495dd29b1762420728
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with critical heuristics indicating it redirects to known malicious infrastructure and functions as a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics point towards a phishing or credential harvesting attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/123?utm_term=pdf+preview+handler+error+outlook+2013 In PDF document text
    • https://jowidizikut.weebly.com/uploads/1/3/0/8/130874332/roledapufa.pdfIn PDF document text
    • https://japafapu.weebly.com/uploads/1/3/1/4/131437770/bcb27e15b1068b2.pdfIn PDF document text
    • https://famonusowofem.weebly.com/uploads/1/3/4/3/134349488/282b594cac.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450724/normal_5fc835e63fdf7.pdfIn PDF document text
    • https://zumokijux.weebly.com/uploads/1/3/5/9/135966910/000a0608ff.pdfIn PDF document text
    • https://dutebosolet.weebly.com/uploads/1/3/0/9/130969562/fatiten-rubozoluzoku-xobumebefapipig.pdfIn PDF document text
    • https://zoroxazug.weebly.com/uploads/1/3/4/6/134614170/1e51f.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/fosalizuzu/54423848864.pdfIn PDF document text
    • https://s3.amazonaws.com/kovezodepugov/fishing_guides_portland_or.pdfIn PDF document text
    • https://s3.amazonaws.com/rafiralexezol/78441104029.pdfIn PDF document text
    • http://famigobefil.epizy.com/umich_course_guide_eecs.pdfIn PDF document text
    • https://s3.amazonaws.com/taturi/54814155725.pdfIn PDF document text
    • https://s3.amazonaws.com/fixararololu/bella_lullaby_piano_music.pdfIn PDF document text
    • http://xuxivobanirug.epizy.com/acpi_atk0110_windows_7_driver.pdfIn PDF document text
    • https://s3.amazonaws.com/nonabafat/vasuzobuzesujagis.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_off0000ddd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDD6 5660 bytes
SHA-256: 677772126faa868b31f7f2e8589f248a22195eb7e6e005b5a2089a80405caac8
font_01_sfnt_off0000f130.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF130 11004 bytes
SHA-256: a1f93340a1e03dc4c3f0791ecc196f0a98c4e2d8eccfd7ad7ff9c31f6831cffe

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