Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee38d556b919ff8e…

MALICIOUS

PDF

78.1 KB Created: 2021-06-06 13:17:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 94cd904a2bf324993f84bc6b7c8efed7 SHA-1: d773f6bb318adb3b6b6c20f52c12dddb1e39fc2b SHA-256: ee38d556b919ff8e89efc4ff7e6ea20578e3ce5b9697110023d2c7eadf9ddcf2
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous external URLs, with one notable URL being https://queure.ru/pbw?utm_term=google+secret+hacks. The PDF structure and the presence of many external links suggest an attempt to redirect users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://queure.ru/pbw?utm_term=google+secret+hacks PDF link annotation
    • https://jodaxirijiv.weebly.com/uploads/1/3/0/7/130776114/c912254d.pdfIn PDF document text
    • https://fobopogukigu.weebly.com/uploads/1/3/4/3/134366855/kalilekafilij-degitebijetage.pdfIn PDF document text
    • https://fadapezak.weebly.com/uploads/1/3/0/7/130775088/gefaxerebozebix_zipapi.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4448995/normal_60b418b29d2af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416332/normal_60ba2c329279e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448096/normal_6035e70303aef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389127/normal_5fc76190f1f04.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459320/normal_60257ec0b3c97.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377647/normal_5ff3c9eb7fac0.pdfIn PDF document text
    • https://povarudoro.weebly.com/uploads/1/3/5/3/135324530/607091.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421048/normal_606ca4ae165f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379974/normal_600cb43db0ce4.pdfIn PDF document text
    • https://paboludozov.weebly.com/uploads/1/3/4/3/134333588/bikasakoj-girezusuteraf-fusewagasiku-lugekawar.pdfIn PDF document text
    • https://zivexipoter.weebly.com/uploads/1/3/1/4/131483036/zofazasiduvofed-ribabomisu-gebuxujizazil-gukaxisobokugev.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424630/normal_6064bafec54f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445550/normal_60604a6bed2cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407991/normal_606c70dab8e2f.pdfIn PDF document text
    • https://rikusinifo.weebly.com/uploads/1/3/4/0/134017093/tawenajefuj_zujizibipimax.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/1729e632-43f5-46ec-a41a-c80e6c5b2746/72514762427.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02fc005a-d7cb-4bf5-9f25-efd8b839a5a1/crown_audio_xti_4002_power_amplifier.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_off0000f491.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF491 5156 bytes
SHA-256: 9d2ada60352563ddece3fd40ca2f1c7311920986362145a64dd469df7408c255
font_01_sfnt_off00010622.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10622 10784 bytes
SHA-256: e69cfae183275517bcda9025f488d6e7a85c79b367415aec9873044352cf4607