Malicious PDF — malware analysis report

Static analysis result for SHA-256 41279e025e7c2af2…

MALICIOUS

PDF

75.8 KB Created: 2021-03-07 05:44:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: d4b8f02157094ab78a1d0c5930f45d24 SHA-1: 09790b5417148b101e0eaf8c562475464d3ddc51 SHA-256: 41279e025e7c2af2ce09c9d14816443f615207c423d9c8c276323a2ce237784a
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a significant number pointing to disposable domains, indicating a link farm or SEO manipulation tactic. 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 embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful sites.

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://botokaw.ru/wix?keyword=sichuan+pavilion+closed PDF link annotation
    • http://lorubuxetorifa.medianewsonline.com/remember_the_titans_movie_questions.pdfIn PDF document text
    • https://vigijamavo.weebly.com/uploads/1/3/0/9/130968937/mogizutogijez.pdfIn PDF document text
    • https://zolerowiz.weebly.com/uploads/1/3/4/6/134691656/videlojiten.pdfIn PDF document text
    • https://jatevabuxises.weebly.com/uploads/1/3/5/3/135382810/jefevanokuv_kabelobezag_jijuvoludogi.pdfIn PDF document text
    • http://dimopun.mywebcommunity.org/gurewaborijisosiganedite.pdfIn PDF document text
    • https://guxojifupu.weebly.com/uploads/1/3/1/4/131438233/pelujol-sazogidelon-nijivuz-tukimikun.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/774569ba-d173-4995-b853-9d76c7a239b9/busuki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/757309e7-8336-467f-bb5f-310a49712bf1/act_3_scene_1_macbeth_ambition_quotes.pdfIn PDF document text
    • https://0df6220b-9630-4647-aab6-0d9db69b9d59.filesusr.com/ugd/8b97dd_31f7c4558ac34382a4cfa897fac8940a.pdf?index=trueIn PDF document text
    • https://8ac5c8e1-9174-427d-95c2-90bebb9f105a.filesusr.com/ugd/44b221_9e5e51cebc0746adbfa1e1486e1bf4a0.pdf?index=trueIn PDF document text
    • https://99470c7d-c692-4648-a7b8-36ea19db2883.filesusr.com/ugd/ab059d_f29c14e627c34ce4abafb00b8d3ec19f.pdf?index=trueIn PDF document text
    • https://3e80c8bf-0031-4ca1-bfa9-4484641fefed.filesusr.com/ugd/08103e_67cd3ecd4e6544ffb97f8dfb597ddf41.pdf?index=trueIn PDF document text
    • https://4c2674ec-1430-4cec-a455-d6a35d10586e.filesusr.com/ugd/38955b_89f90d6eea774d1a80974c8a0f7d575a.pdf?index=trueIn PDF document text
    • https://5926284e-b61c-4ed0-95e5-27b9feedd2c3.filesusr.com/ugd/50c35f_437cbaad75c3464fb82c11a9ad719561.pdf?index=trueIn PDF document text
    • https://a819be37-316e-4347-83bc-b067fb6953c8.filesusr.com/ugd/d5662a_aece88c372cc4b3c8719e88f2c0935f4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/60a6faaa-c1b3-4d06-bf99-a88bb60e822a/fufite.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c666d8f-b4f5-459c-8856-cc211f770079/sigelei_150w_temperature_control.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7384040c-7010-476a-8769-d5493eb2c0d6/zazumajawa.pdfIn PDF document text
    • https://849bdae7-2456-4570-9e2a-fc769e7e49ad.filesusr.com/ugd/2074c9_b9183503920245b8b6f25d4927ff79ef.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_off0000ecca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECCA 5228 bytes
SHA-256: e761ade8e376a5aaf2dbe4db6af88a87db05890594290036da95e0dc5d548f9c
font_01_sfnt_off0000fe9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE9D 10396 bytes
SHA-256: 324d8d5945d08f7efc43e2d58c3accd5715b10a033d878ce8d38421fe63b8d1e