Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce9b33ed91803551…

MALICIOUS

PDF

73.8 KB Created: 2021-03-22 15:41:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 4178226cb48cffde61d6c2aa46b78ec6 SHA-1: 58486c2d536e19fb4f4b63889617aaef48871cee SHA-256: ce9b33ed9180355151cfbb4d0ad75962b39848c17ebba522ed6a196b224f745d
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, with one heuristic specifically identifying a 'PDF_SEO_LINK_FARM' pointing to a suspicious URL. The presence of these links suggests the document's purpose is to redirect users to potentially harmful websites, possibly for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://midufefew.ru/wix?keyword=sim+taxi+2016 PDF link annotation
    • http://jakor.pro/guxakosi9eeui.pdfIn PDF document text
    • https://zuwubusonelab.weebly.com/uploads/1/3/0/7/130739898/rakitawajamewe.pdfIn PDF document text
    • https://cdn.sqhk.co/livukigelo/Ohdjiih/19337080301.pdfIn PDF document text
    • https://vosilidasum.weebly.com/uploads/1/3/2/7/132740263/5172113.pdfIn PDF document text
    • https://pomapufawupufus.weebly.com/uploads/1/3/5/3/135397804/lilunulazo.pdfIn PDF document text
    • https://cdn.sqhk.co/dasisogi/hiSrOja/lilugepipelirom.pdfIn PDF document text
    • https://riwaxetonebena.weebly.com/uploads/1/3/4/3/134363930/0caf9afc445.pdfIn PDF document text
    • https://cdn.sqhk.co/raxulaxesob/WGifWhd/piano_play_and_learn_music_mod_apk.pdfIn PDF document text
    • http://wtia.space/65470203979dy18v.pdfIn PDF document text
    • https://mexobuvuxe.weebly.com/uploads/1/3/4/3/134369937/tizepaper.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/palevijuj/rusixubewoxuvufuzet.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/how_long_will_non_filers_have_to_wait_for_stimulus_check.pdfIn PDF document text
    • https://s3.amazonaws.com/lonozote/63524924282.pdfIn PDF document text
    • https://s3.amazonaws.com/debiwelof/60345730666.pdfIn PDF document text
    • https://s3.amazonaws.com/wipotegadodorek/79519199943.pdfIn PDF document text
    • https://s3.amazonaws.com/gavapozalilup/harry_potter_and_the_philosophers_stone_very_short_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/busutafitufe/narration_exercises_for_class_10_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/bogijexu/cercanias_map_madrid.pdfIn PDF document text
    • https://s3.amazonaws.com/negonanopix/the_cask_of_amontillado_study_guide_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/international_trade_ppt_template.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_off0000e3a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3A3 5176 bytes
SHA-256: b45a1a16b2e33775fa66c2fdf1f66f3fd551ab4c296d11855ada6b570469a319
font_01_sfnt_off0000f537.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF537 10984 bytes
SHA-256: 654db4a9e4fce9bdc674d9fe29b49f4482d8578ec119853a5e13d378ddce5d9a

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