Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d8bac7ebd13a14a…

MALICIOUS

PDF

90.6 KB Created: 2021-03-08 08:37:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 8688f764a94f8654c7609de7fab1de1d SHA-1: 4b600921d18cacb0b577ae62fc58f84e9174481e SHA-256: 5d8bac7ebd13a14ae662ef028a39f603c41a54125bc0e83fa749221a671c093c
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links pointing to various domains, many of which appear to be disposable or used for SEO manipulation. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or distributing further malware. No scripts were extracted, but the structure suggests a link farm designed to lure users to malicious or deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://gimoguvi.ru/award?keyword=hoover+steamvac+repair+near+me PDF link annotation
    • https://bifekanivixu.weebly.com/uploads/1/3/1/4/131408854/3678420.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404990/normal_5feb0b8c1106e.pdfIn PDF document text
    • http://doucheapp.xyz/can_2_letter_words_be_used_in_scrabble77ssr.pdfIn PDF document text
    • https://cdn.sqhk.co/vumorumuvogi/ZU6Rehh/3d_wallpaper_for_computer_free_download.pdfIn PDF document text
    • http://halfraire.xyz/quorum_annual_report4pf1c.pdfIn PDF document text
    • http://nixuvukoda.iblogger.org/dojeburuveniwufubevuxi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489041/normal_603479e0cca90.pdfIn PDF document text
    • https://rawuwivusezorom.weebly.com/uploads/1/3/1/4/131406564/getubegozazu_busufamad_figusosu_wojak.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463006/normal_5ffc7303e4313.pdfIn PDF document text
    • https://cdn.sqhk.co/tinawegu/rgjYMih/vr_cinema_3d_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404124/normal_5fe6beb333750.pdfIn PDF document text
    • https://cdn.sqhk.co/mivoteloxip/39W2Ehb/91331742498.pdfIn PDF document text
    • https://cdn.sqhk.co/vilonunufuk/aGigSjb/windows_10_launcher_for_chromebook.pdfIn PDF document text
    • https://viwajojavejad.weebly.com/uploads/1/3/1/8/131858172/1e14fed.pdfIn PDF document text
    • https://cdn.sqhk.co/mamozinuba/GMhf5J1/65525834066.pdfIn PDF document text
    • https://cdn.sqhk.co/luxixumogez/Gicibhe/mountain_bike_accessories_for_sale.pdfIn PDF document text
    • https://cdn.sqhk.co/pugudanirav/pWjijfO/quiz_bingo_tv_show.pdfIn PDF document text
    • http://gujejimoge.iblogger.org/67428527161.pdfIn PDF document text
    • https://cdn.sqhk.co/jokawefezo/Ndfhahg/mt_rushmore_weather_in_december.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379859/normal_6035a5472bbc6.pdfIn PDF document text
    • https://ramakizuwag.weebly.com/uploads/1/3/4/3/134321509/6fa3d8.pdfIn PDF document text
    • http://reduslimitaly-official.website/coroner_s_inquest_reports_lancashirepgxmm.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://zebajufomig.epizy.com/78679318040.pdfIn PDF document text
    • http://zitagarutotegiv.rf.gd/introductory_mathematical_analysis_for_business_economics_13th_edition.pdfIn PDF document text
    • http://xawoforusur.epizy.com/aicc_session_full_form.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000119c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119C2 4856 bytes
SHA-256: fbe69e36e9412507eb5454e7cdb234e833734b42bfef39f49ece723dce5dd9dd
font_01_sfnt_off00012a25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A25 10704 bytes
SHA-256: 3bfb10c087054d7a3c9d7d6c30c5e7caa5831ddc683e3ba1f418a2664ab61773
font_02_sfnt_off00014ec0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EC0 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71