Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a60a815712d8488…

MALICIOUS

PDF

75.5 KB Created: 2021-03-09 04:43:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 06bd94ceaf8a7b2d635f886b6f30b224 SHA-1: 45f85bbac429e708b8c7898406bc536e096c69a1 SHA-256: 0a60a815712d8488e82e35e61796e1ccb567464fdefa4f157ba05ed5a1240e47
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous external links to other PDF documents, likely for SEO manipulation or to distribute further malicious content. The presence of many external links, some on disposable hosting, suggests a phishing or spamming campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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/award?keyword=asme+b31+3+pdf+2020 PDF link annotation
    • https://xedawazusaxe.weebly.com/uploads/1/3/2/3/132303108/2655688.pdfIn PDF document text
    • https://cdn.sqhk.co/tibidimewako/bcImdmp/2020_olympics_mascot_plush.pdfIn PDF document text
    • https://cdn.sqhk.co/wujozuzewed/a69yQqa/streamer_sim_tycoon_apkpure.pdfIn PDF document text
    • https://cdn.sqhk.co/vedisaso/xjijikX/jawawomawuw.pdfIn PDF document text
    • https://fejevudud.weebly.com/uploads/1/3/2/6/132695511/0c6037ffdcb.pdfIn PDF document text
    • https://zobojosapez.weebly.com/uploads/1/3/1/4/131483592/d02468d09ed.pdfIn PDF document text
    • https://wekowegalovu.weebly.com/uploads/1/3/4/6/134668649/eb671a3ce.pdfIn PDF document text
    • https://xekotoruwogobib.weebly.com/uploads/1/3/1/6/131606212/bagoxixan.pdfIn PDF document text
    • https://cdn.sqhk.co/tejilunuf/l7NibKo/guidebook_app_download_for_android.pdfIn PDF document text
    • https://cdn.sqhk.co/sugezigo/qCfghBj/notification_email_format.pdfIn PDF document text
    • https://cdn.sqhk.co/vefapatape/gjZU7du/50363973719.pdfIn PDF document text
    • https://wuxorazaw.weebly.com/uploads/1/3/2/7/132712222/jijufexagafiwo.pdfIn PDF document text
    • https://cdn.sqhk.co/xuzuvazol/Dgdhgjj/46939314892.pdfIn PDF document text
    • https://mafobosapufi.weebly.com/uploads/1/3/4/5/134505980/pewojisip-biradiritak-babopawis-wegupedinagut.pdfIn PDF document text
    • https://cdn.sqhk.co/junikesiza/dja73id/76133305368.pdfIn PDF document text
    • https://fawesilabe.weebly.com/uploads/1/3/2/6/132680990/57a7ff.pdfIn PDF document text
    • https://cdn.sqhk.co/zejejofe/akgeEhs/rubusixijagiw.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/waxapoz/aha_endocarditis_guidelines_2016.pdfIn PDF document text
    • https://0efdb04f-128a-4c0d-ace4-8b312723ebcc.filesusr.com/ugd/5508f4_3c8b31f5dcd34ca48022b739390e7205.pdf?index=trueIn PDF document text
    • https://99470c7d-c692-4648-a7b8-36ea19db2883.filesusr.com/ugd/ab059d_58ea248397fc437ba9cc5149f177fb54.pdf?index=trueIn PDF document text
    • https://3cd6846c-369c-4875-9c63-132df726a2dd.filesusr.com/ugd/7ab50f_07466904a6a6444cb7cae8c9643028b1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/niwotipugonuvoz/consumer_reports_one_cup_coffee_makers.pdfIn PDF document text
    • https://s3.amazonaws.com/jalasilunaz/google_chrome_free_latest_version.pdfIn PDF document text
    • https://b32521b7-32ca-447e-9967-d27d0dce683d.filesusr.com/ugd/800b88_ef363837bdad4115be13edb3650631d4.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_off0000e96a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE96A 5468 bytes
SHA-256: 7b7396519fe02e613fc191c21809eeb92f24ed6e8a10253f48c76ff00cea8bb5
font_01_sfnt_off0000fbf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF6 10288 bytes
SHA-256: 9f8be92663d5a50b3f24bd18a031aef75f85467596b7c6633eb55f01704f8ef5