Malicious PDF — malware analysis report

Static analysis result for SHA-256 266f63b0ba6192d0…

MALICIOUS

PDF

66.5 KB Created: 2021-02-09 23:56:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 71fbc3250e67feea2f6f2bdf180e7c89 SHA-1: e25849204b00eb73a220fd9f9b1a80e177416052 SHA-256: 266f63b0ba6192d09342cfbe6025e57db3ca2f1ae9b28e738d1731a9f30796c9
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 ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous external URIs pointing to other PDF files hosted on disposable domains, such as http://datulosuwila.iblogger.org/walexagiwinexolesit.pdf. The primary purpose appears to be directing users to potentially malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jottigo.ru/123?utm_term=melisandre+costume+uk PDF link annotation
    • http://datulosuwila.iblogger.org/walexagiwinexolesit.pdfIn PDF document text
    • http://roman-holidays.shop/crab_rave_saxophone_sheet_musicsj5tc.pdfIn PDF document text
    • https://viremekim.weebly.com/uploads/1/3/1/4/131407965/08a4d6da320e61.pdfIn PDF document text
    • https://cdn.sqhk.co/bigulikexupa/Xegi0ha/gexopevafol.pdfIn PDF document text
    • https://fukimeremunosav.weebly.com/uploads/1/3/1/3/131379236/jilulom-suxofufone-lidufakupape-notir.pdfIn PDF document text
    • http://yudekor.ru/samoridagotekitusaznes.pdfIn PDF document text
    • https://voxonororipesap.weebly.com/uploads/1/3/5/3/135383222/1952453.pdfIn PDF document text
    • https://mesasijodise.weebly.com/uploads/1/3/5/3/135315214/suxif_kalolim_ribozesitebaxa_sarisulaz.pdfIn PDF document text
    • https://wigabededonekan.weebly.com/uploads/1/3/0/7/130740374/bozumolevam_tolifufasugonub_daxidixikefiz_fopopinina.pdfIn PDF document text
    • https://cdn.sqhk.co/bufomofa/gfnmhhe/picsart_photo_studio_old_app_download.pdfIn PDF document text
    • http://medway24.com/12660407893wxfgf.pdfIn PDF document text
    • http://fisogik.iblogger.org/zitemadigakubowitak.pdfIn PDF document text
    • http://trokot-online.xyz/febikulujafevepuruzatipiqnre1.pdfIn PDF document text
    • https://tavebesu.weebly.com/uploads/1/3/1/3/131381332/7ebf3d523a.pdfIn PDF document text
    • https://nurufumetexode.weebly.com/uploads/1/3/5/3/135323779/zonibeze.pdfIn PDF document text
    • https://cdn.sqhk.co/povuguzuloga/hhapjfO/my_talking_tom_2_game_download_apkpure.pdfIn PDF document text
    • https://vugawijop.weebly.com/uploads/1/3/4/5/134594760/migigifila_pelevapawatos_vakogo_nebugapiso.pdfIn PDF document text
    • https://gikesusemu.weebly.com/uploads/1/3/4/7/134775173/54d6f6b5fa.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/jujadodedaruxix/wesejipidewiraralutasixo.pdfIn PDF document text
    • http://xelilurezo.epizy.com/biogenetic_law.pdfIn PDF document text
    • https://s3.amazonaws.com/vunizi/sanenabalaselexibenobo.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_off0000c598.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC598 5156 bytes
SHA-256: 953157808b37465134b4ecd26bbd7ad1f6269c1dcc8710ce34f9d9693673eef3
font_01_sfnt_off0000d715.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD715 11088 bytes
SHA-256: b318d7ab15dd82f341f8a5af98b6401034d1c0dfb595c97c2ad7ed4d4cf155b2