Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbd052fd61519862…

MALICIOUS

PDF

81.0 KB Created: 2021-03-20 23:19:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9fd4bd2bec80eee83f663dfe146cc7e9 SHA-1: 979841df384296a9e3152114a31ab04ee6edc576 SHA-256: fbd052fd61519862b43210b2162fd8a6be7ad0929d17800784c3b145b711f445
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9993

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://jottigo.ru/aws?utm_term=american+history+x+movie+summary PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4422627/normal_6024a14309ce7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454807/normal_5fda2c840c3c5.pdfIn PDF document text
    • https://gigiwejube.weebly.com/uploads/1/3/5/9/135984489/tikolebewodisi.pdfIn PDF document text
    • https://dikekivex.weebly.com/uploads/1/3/0/7/130775400/zifubunawekisakemodu.pdfIn PDF document text
    • https://pomaripo.weebly.com/uploads/1/3/0/9/130969966/gojax.pdfIn PDF document text
    • http://tewazezila.66ghz.com/how_to_copy_words_on_instagram.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385859/normal_603a446da9c80.pdfIn PDF document text
    • http://foluxokifoni.22web.org/nagurewi.pdfIn PDF document text
    • https://zakepanitug.weebly.com/uploads/1/3/5/9/135977879/suxuwareboxum.pdfIn PDF document text
    • http://xuvaguwanolinu.66ghz.com/sembaruthi_sembaruthi_video_song.pdfIn PDF document text
    • https://fupefodomixeja.weebly.com/uploads/1/3/4/8/134889506/wexutitiralib-govog.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8ee4d174-735f-4cd7-9396-c3a65dbcc337.filesusr.com/ugd/5ac313_09c1e30b56824b178a21097688e6ed76.pdf?index=trueIn PDF document text
    • http://sobibuxasegisun.rf.gd/berger_paints_exterior_colour_combination.pdfIn PDF document text
    • http://zokazeza.rf.gd/39978578358.pdfIn PDF document text
    • https://s3.amazonaws.com/bipepezuwed/90351769983.pdfIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/55213882853.pdfIn PDF document text
    • http://bepinutarefe.rf.gd/xoros.pdfIn PDF document text
    • http://ketunetu.rf.gd/visual_bcd_editor_free.pdfIn PDF document text
    • http://zenerunikojovo.epizy.com/marvel_super_war_apkpure.pdfIn PDF document text
    • https://2f8a6ab9-e864-4757-b083-6627a13f4c48.filesusr.com/ugd/405339_c265f5b03fcf4720aca2f64db11fe291.pdf?index=trueIn PDF document text
    • http://fofanab.epizy.com/grandfather_s_clock_sheet_music_piano.pdfIn PDF document text
    • https://6f12065f-c45d-410c-b048-6ec23fb2b810.filesusr.com/ugd/02ccf7_107b6a6e00384068be9984e4276910ab.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gavobawum/history_questions_and_answers_app.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ffec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFEC 5224 bytes
SHA-256: e33e41cfed505270c09950c707f55132ce528485170243406169b8a441a71a28
font_01_sfnt_off00011191.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11191 11116 bytes
SHA-256: 2105285f54b3e8fb54624c383b0d65bc53c3476af9248db9d1f6034045520174

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