Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee41d7df3ebee42b…

MALICIOUS

PDF

75.2 KB Created: 2021-05-29 07:23:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 9fe7e84098032634490d95ede1609899 SHA-1: 7795c6f5e8f7dd24db58e01baec7d12716378b36 SHA-256: ee41d7df3ebee42bf64d026be846579f42d9dc702139405f884e3f3d97b7693c
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a link farm with numerous external URLs, including one pointing to 'xezojetit.ru', suggesting a phishing or malware distribution scheme. The PDF structure and embedded links are indicative of a tactic to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://xezojetit.ru/strik?utm_term=ample+guitar+m+lite+32+bit PDF link annotation
    • https://juwarojolajekol.weebly.com/uploads/1/3/4/1/134108785/6311451.pdfIn PDF document text
    • https://jujoxetanilodav.weebly.com/uploads/1/3/5/3/135397559/benuzegolazofon.pdfIn PDF document text
    • https://jilanuma.weebly.com/uploads/1/3/4/5/134522828/c29c97e.pdfIn PDF document text
    • https://biweworu.weebly.com/uploads/1/3/4/5/134525234/goletitu.pdfIn PDF document text
    • https://pujezifug.weebly.com/uploads/1/3/0/7/130738771/rofiwakugu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4394072/normal_5fff750bbf17c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382621/normal_6044f87712e09.pdfIn PDF document text
    • https://tetaretutu.weebly.com/uploads/1/3/4/8/134872422/482369.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464869/normal_600fd12f07f41.pdfIn PDF document text
    • https://misurabize.weebly.com/uploads/1/3/4/6/134666879/xavijoxu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417128/normal_5fd03744aaf3e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415322/normal_602da959bcef5.pdfIn PDF document text
    • https://wiwufupa.weebly.com/uploads/1/3/2/8/132814928/mopis.pdfIn PDF document text
    • https://senuwisaf.weebly.com/uploads/1/3/4/0/134018119/1139099.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b98236b3-f640-4e7d-a69d-81082886a0e7/35255652996.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb0dcf6c-68b9-48cc-ba74-004d4aea8460/80699397151.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d72b03d-a328-42a9-a6a3-0506226aa11d/computer_repair_flowchart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d61ab88f-f5f2-4954-b9a9-a06d40fd2475/foxifewi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1be33f7-cf79-47b8-a382-54737c523ac0/monkey_business_meaning_in_hindi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63f05e35-b7a6-4e67-8db8-d6863b781461/dexobudikagesew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aefadbe1-99f6-42a0-8674-e68912bc0f3d/72538814618.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18453c2c-d7d8-4b4f-aeca-fce9b519182d/99066834469.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_off0000e813.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE813 5384 bytes
SHA-256: 0d88ffbe744a79389b57db9aafbd93e7ec4d187d22a28a4480805232033db84f
font_01_sfnt_off0000fa51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA51 11012 bytes
SHA-256: 194d8fc466593e598cbb81340d4f146f6fc7eba0653ccd4e852115be32f3d0c1