Malicious PDF — malware analysis report

Static analysis result for SHA-256 260ae6d0af3ab5d2…

MALICIOUS

PDF

72.8 KB Created: 2021-04-04 01:09:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 136444d8e11e90b2a2390b31efbb8e9e SHA-1: c6e1ecf09e01c28c2d57d0bf0beec1fb77ccb822 SHA-256: 260ae6d0af3ab5d23f5b663df2eaa994935b39a1691451792e081a15d3a40cbf
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a machine learning classifier and ClamAV, indicating malicious intent. It contains numerous embedded URLs, with at least one pointing to a disposable hosting service, suggesting a link farm designed to redirect users to potentially malicious sites. The presence of external URIs and the 'link farm' heuristic strongly suggest an attempt to lure users to external resources, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 5

  • 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 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://druttle.ru/award?keyword=apostoles+de+la+palabra+libros+pdf PDF link annotation
    • https://cdn.sqhk.co/rajexizeba/gg89hbt/13195767674.pdfIn PDF document text
    • http://akfb.online/vusojexavamafovimegcnvl2.pdfIn PDF document text
    • https://cdn.sqhk.co/genopeno/gitAjcj/yeezy_500_utility_black_yeezy_supply.pdfIn PDF document text
    • https://cdn.sqhk.co/kopuzeginev/niejeji/39952496645.pdfIn PDF document text
    • http://lovechat24.club/one_summers_day_guitar_tab_sungha_jungb9xtx.pdfIn PDF document text
    • http://nakodinita.scienceontheweb.net/2019_ford_mustang_gt_premium_top_speed.pdfIn PDF document text
    • http://khareedforosh.com/what_is_english_10101xgz2.pdfIn PDF document text
    • https://cdn.sqhk.co/xakurusuk/gfjageE/gijop.pdfIn PDF document text
    • https://cdn.sqhk.co/boxoveru/ibDhhkG/xurijotuwurapesididaku.pdfIn PDF document text
    • http://amorexpo.com/citra_emulator_gamess1ucd.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://pabewuvuxaf.onlinewebshop.net/bayesian_reinforcement_learning.pdfIn PDF document text
    • https://s3.amazonaws.com/zifozujiwi/what_is_the_catholic_church_based_on.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02b8ea28-c2f9-4c72-add7-b87ab995bfe0/barawonuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ddf6b959-16f6-4dd5-9855-ad2c24b39d72/marbury_v._madison_definition_apush.pdfIn PDF document text
    • https://s3.amazonaws.com/jakujakula/bandook_chalegi_2_video_mein_mp4.pdfIn PDF document text
    • https://a49aa754-465e-4bbd-924e-b3d0e7b66bd4.filesusr.com/ugd/81d6a4_5dc609ea04e14bde8111326e55a0d333.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/befarekogol/fall_newsletter_templates_microsoft_word.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a527c55-648d-4624-80ef-e20a9e1e59a2/tudemuxumamukadur.pdfIn PDF document text
    • https://s3.amazonaws.com/vekodupiwarobi/20842347568.pdfIn PDF document text
    • https://1cf095b7-1d29-4152-b82c-7733cf7ba0c7.filesusr.com/ugd/c1de29_035d184b80204681b19162debd308b2e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/13f13482-7f14-4305-a16d-02de9eb3bf91/94618095006.pdfIn PDF document text
    • https://4e4301d6-cc9a-4939-960a-6b497c1efea6.filesusr.com/ugd/d78803_3ea30e86ff9746888cae8de57ec1ec17.pdf?index=trueIn PDF document text
    • https://434dcbc4-7bd9-40fe-99bf-e102daebf961.filesusr.com/ugd/07ef24_14d36be4180b4bc7962c5d4a9c8e901d.pdf?index=trueIn PDF document text
    • https://6b5d12f1-3bbc-48af-9ddb-5430d2fe15e7.filesusr.com/ugd/3bf302_29e1a3cbf3df408ab4bf18f4118a753d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dudurat/gumirixobosuvipufelivadiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24d6377b-eecd-4967-aff3-877a4759736b/90473844502.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_off0000ceb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEB3 4844 bytes
SHA-256: cbc9e73af6ce631186d016c22c8b5940ae627685c1077acd8526aa4ec9a6342a
font_01_sfnt_off0000df35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF35 11752 bytes
SHA-256: 6105a465bc216461609049d046924fe88afc75c92a0331be801001f84cc760e6
font_02_sfnt_off000105a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105A0 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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