Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8bde1133e9c4428…

MALICIOUS

PDF

71.4 KB Created: 2021-03-22 03:20:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: b0e26feecf9b5c0d09ac02d469006b24 SHA-1: 2e8153a00a832b4f2f8d4bcf5aacaabe0fb935a1 SHA-256: f8bde1133e9c4428195d43bcd58aa7b8c3257924c1b6cebee64e907f6faa9e7a
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were directly extracted, the PDF structure and numerous external URLs point towards an attempt to redirect users to malicious content, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://kuzutuzo.ru/wix?keyword=poetic+devices+worksheet+1+pdf PDF link annotation
    • https://cdn.sqhk.co/tirekidifole/cVPhahj/gang_war_mafia_apk_uptodown.pdfIn PDF document text
    • https://cdn.sqhk.co/xulawajikigi/bwgf7i6/xezotorinisevevubegezaji.pdfIn PDF document text
    • https://jetesobamu.weebly.com/uploads/1/3/5/3/135323438/tefid-siwofurojelo-gutimem-nazupobu.pdfIn PDF document text
    • https://cdn.sqhk.co/fabozesemi/j652rhj/chat_rooms_app_for_android.pdfIn PDF document text
    • https://cdn.sqhk.co/vekuperik/eidt6hd/idle_heroes_private_server_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/josurowelimu/dpThfxI/do_u_know_facts_about_love.pdfIn PDF document text
    • https://cdn.sqhk.co/zejizoguzut/EhbMhf2/43006419117.pdfIn PDF document text
    • https://poxolegap.weebly.com/uploads/1/3/1/0/131069824/wotazefek-wejinam.pdfIn PDF document text
    • https://cdn.sqhk.co/someteku/njaVjfC/70634928147.pdfIn PDF document text
    • https://rozeravepirasaj.weebly.com/uploads/1/3/2/8/132816036/vomizovoravuki.pdfIn PDF document text
    • https://cdn.sqhk.co/remezebona/AgeJjiE/archery_bow_range_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/ratufewebu/jjghbR5/jeux_baby_hazel_halloween_party.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/30833880-a32f-4233-b566-7106d1236152/96422270048.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23d5b8d0-9dca-4e50-ad89-0ccf8d0f5ac6/safuninexekitax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1625b1e0-9692-4e6e-8e5b-6ff07e0d59d5/14084249111.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec6e8ae3-dcad-4c76-a330-74cca29c7f10/how_to_become_a_certified_medical_interpreter_in_washington_state.pdfIn PDF document text
    • https://ef90beaa-bca2-431e-862c-49c19dd94618.filesusr.com/ugd/06497e_342233b4b2294d479f0b8c2ffdfe7c3e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8f5ad4e-1bf7-46e2-b7fe-04127b6fce15/excellence_playa_mujeres_cancun_honeymoon.pdfIn PDF document text
    • https://86a9da1b-0b57-4b35-a77a-523886b904cd.filesusr.com/ugd/0d9a50_b2675df565f14f61a8291438d371b2f8.pdf?index=trueIn 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_off0000dbb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBB9 5268 bytes
SHA-256: 14ca5eb9ba193a384f285ecb0155664c8935c9f24019d136713f3aab975a2b35
font_01_sfnt_off0000edc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC1 10116 bytes
SHA-256: 52bc7f931ac2bca456a173b6242f881e96494aa028193cddcdb8484e2977cf46

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