Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fe8cbb7c5f46388…

MALICIOUS

PDF

76.0 KB Created: 2021-03-06 01:56:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: c447081b7aeb8cb62502685a816e2ef0 SHA-1: b1bcb77c84c52eca199b4fd56f1f7d7fb93f3fdb SHA-256: 3fe8cbb7c5f463881518f88974254ffdfaf9aa20290cf17d6df2ac984c8d8344
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/123?utm_term=bedtime+stories+movie+2 PDF link annotation
    • https://dujizajep.weebly.com/uploads/1/3/4/7/134704211/zinadigajufave.pdfIn PDF document text
    • https://cdn.sqhk.co/zodunoxurob/fHvijUz/jekukujixemelibojurulan.pdfIn PDF document text
    • https://ruxibudowivuk.weebly.com/uploads/1/3/4/7/134728491/totodotusu_vixato_bumigudeboke.pdfIn PDF document text
    • https://wipowolulufobud.weebly.com/uploads/1/3/1/4/131437369/sileki.pdfIn PDF document text
    • http://vejefulolite.22web.org/hoa_board_of_directors_meeting_agenda_template.pdfIn PDF document text
    • https://devigafaviv.weebly.com/uploads/1/3/4/6/134698058/7ca6aa43c3e.pdfIn PDF document text
    • https://zegikawa.weebly.com/uploads/1/3/4/6/134640481/1610111.pdfIn PDF document text
    • https://cdn.sqhk.co/kawinojos/a8QEvtj/thumbelina_movie_1994.pdfIn PDF document text
    • https://rosokejasos.weebly.com/uploads/1/3/1/8/131871530/57608.pdfIn PDF document text
    • https://witowufagefalob.weebly.com/uploads/1/3/0/7/130738848/misigopofefazub-gezaw-sanivemuvag-sogeb.pdfIn PDF document text
    • https://cdn.sqhk.co/gixegusu/hjanQjf/pazunaje.pdfIn PDF document text
    • https://zuzilenew.weebly.com/uploads/1/3/4/5/134527977/3017535.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/jefazaxal/namodozifilatasalofopudod.pdfIn PDF document text
    • https://d4bcd744-2348-4fe3-9006-05b2fcbd3cbd.filesusr.com/ugd/704566_c628bc32316443e8958788e32086f5e0.pdf?index=trueIn PDF document text
    • https://625f08e2-3d8e-45b5-8e8c-b95d001c5c7c.filesusr.com/ugd/d94ae5_909a1569f6a845b49b1db78965389d38.pdf?index=trueIn PDF document text
    • http://wijijatalil.epizy.com/o_que__energia_estatica_na_informatica.pdfIn PDF document text
    • https://cb6d8354-940b-4e05-9f1d-0150973ab277.filesusr.com/ugd/882da0_64b76f53cd2441789722eb2fbd488f34.pdf?index=trueIn PDF document text
    • http://foripoj.epizy.com/acunetix_with_crack.pdfIn PDF document text
    • http://kotutuvotijol.rf.gd/what_the_bleep_do_we_know_down_the_rabbit_hole.pdfIn PDF document text
    • http://lolukojalima.epizy.com/zaganiso.pdfIn PDF document text
    • https://s3.amazonaws.com/gezejoputiwinu/application_letter_for_a_teaching_job_template.pdfIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/49860243837.pdfIn PDF document text
    • https://s3.amazonaws.com/jofunozuzof/75214609249.pdfIn PDF document text
    • https://2e81f42f-67f9-46a9-89e2-a5f3ab3b03ee.filesusr.com/ugd/f138f5_5d1d585fe1a643f4b0c24003df513c0c.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_off0000ea3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA3D 4972 bytes
SHA-256: cd4d635724526e6d2b18ff2855e9f78c662f6f717d8bf55a16d6de84dc662647
font_01_sfnt_off0000fb1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB1A 12344 bytes
SHA-256: 3db9f989099846c3e5215ad5f647137feadf56a8226d968527e2ea5879da7758

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