Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dc661c226622440…

MALICIOUS

PDF

84.9 KB Created: 2021-03-06 18:38:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ecccb86bf910fcf7aa4122a0765e685d SHA-1: 9ef6cac8dabfd3cf8507ea1a7e32999190ed83ac SHA-256: 0dc661c226622440bfbb80a20ba6dedfcee1c844def71a2a5c914ddca8e8ebe9
156 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 0.9992

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 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.
  • 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/wix?keyword=movavi+plus+2020+crackeado PDF link annotation
    • https://surinulijo.weebly.com/uploads/1/3/4/6/134648677/gotetiwetulumejixu.pdfIn PDF document text
    • http://dawuxapi.iblogger.org/superstore_episode_guide_season_3.pdfIn PDF document text
    • https://mesopivupezuna.weebly.com/uploads/1/3/5/3/135311967/vilopigatemunowefezi.pdfIn PDF document text
    • https://mojapilujo.weebly.com/uploads/1/3/0/9/130969316/5374535.pdfIn PDF document text
    • http://vowufijetapiko.sportsontheweb.net/fagumi.pdfIn PDF document text
    • http://wegaturagifo.getenjoyment.net/what_is_quantum_efficiency_in_photochemistry.pdfIn PDF document text
    • https://ladufuvugekowek.weebly.com/uploads/1/3/4/1/134108614/leganu_fimuzije_fejuduxelutijuw.pdfIn PDF document text
    • http://bizowokare.getenjoyment.net/patevamadexegutesafiv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dimonejoxu.rf.gd/brs_pathology_5th_ed.pdfIn PDF document text
    • http://woruzuxolalov.rf.gd/the_avalanches_wildflower_rar.pdfIn PDF document text
    • https://54957a25-093b-4cbd-a4f0-8eb5fea931f0.filesusr.com/ugd/8ba634_145bfa0de32848b683cbdf84adef77b2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zalomi/78732797017.pdfIn PDF document text
    • https://s3.amazonaws.com/nigimul/grace_kelly_mika_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/gofilafixu/metformin_500_mg_tablet_leg.pdfIn PDF document text
    • https://af30af13-e0b7-4de0-aca7-7783c01eade2.filesusr.com/ugd/9757e7_0bee38edb8864306ad458875fd4bdbc9.pdf?index=trueIn PDF document text
    • http://paruwegugu.rf.gd/proforma_invoice_template_xls.pdfIn PDF document text
    • https://s3.amazonaws.com/tedowafomaru/android_developer_salary_in_india_for_freshers.pdfIn PDF document text
    • https://aa6d2f86-95e2-42cc-897e-6bbd71c3a116.filesusr.com/ugd/78daac_c7f0c7db4eaf4ae3a5ff93adebacc924.pdf?index=trueIn PDF document text
    • http://gimusatis.rf.gd/vomeporositututamijavir.pdfIn PDF document text
    • https://ab60d57a-1f92-408f-9079-0b325776b613.filesusr.com/ugd/724fb5_55150859bedf494d85dcd6c508425c6d.pdf?index=trueIn PDF document text
    • https://33c7e2ec-32fc-4676-a642-9d95a4379e01.filesusr.com/ugd/622218_e5b4946afcbf4c47947c4ff32f96e43f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/badodemebo/vezurev.pdfIn PDF document text
    • https://1a9cd40a-f0d6-44d4-a143-19288280ca2b.filesusr.com/ugd/7a13df_6658469de5b14a0f9bc8de9d706484e0.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_off00010d2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D2F 5468 bytes
SHA-256: a310fd5daed3274a289202346e62c9a2e3f3b836e653bdf889f94a47ae1e62bd
font_01_sfnt_off00011feb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FEB 11108 bytes
SHA-256: 999cc76f8836c5348417388c9486317867d63743369666e1905eb6118b7d07d5

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