Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7f6e6b71c9aaf87…

MALICIOUS

PDF

79.2 KB Created: 2021-03-11 01:42:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: aa94c905be0b8b6c3bb74b272533cdd0 SHA-1: 517db951dc138d89107e104a919c64a68b1f89e5 SHA-256: d7f6e6b71c9aaf87235b604f33cb735c6ef9c726c7f8dc2a301773e96256cd95
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a link farm, with the primary purpose of directing users to potentially malicious websites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to exploit users through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://jacksth.ru/strik?utm_term=nancy+drew+season+1+episode+10 PDF link annotation
    • http://lenugaguv.medianewsonline.com/the_book_of_angel_raziel_in_english.pdfIn PDF document text
    • http://kazimibi.getenjoyment.net/as_a_man_thinketh_number_of_pages.pdfIn PDF document text
    • https://dokegofixak.weebly.com/uploads/1/3/0/8/130873830/4f911badb750.pdfIn PDF document text
    • http://modozadubop.mywebcommunity.org/bewipogewawo.pdfIn PDF document text
    • http://zunuruxeguxifi.mygamesonline.org/ropix.pdfIn PDF document text
    • http://byt-upak.ru/furniture_design_portfoliog15ca.pdfIn PDF document text
    • http://bivoliku.mywebcommunity.org/74274914736.pdfIn PDF document text
    • https://nipixejewawowe.weebly.com/uploads/1/3/0/8/130874539/ef6aacc.pdfIn PDF document text
    • https://kekixulup.weebly.com/uploads/1/3/1/4/131407102/divetum.pdfIn PDF document text
    • http://nikaold.site/bugawisuwisij6779x.pdfIn PDF document text
    • http://it50disconto.info/clicker_keypad_does_not_working_on_iphone70c2v.pdfIn PDF document text
    • http://dektesheff.xyz/bare_necessities_sheet_music_flute8thv4.pdfIn PDF document text
    • https://bigadamedoje.weebly.com/uploads/1/3/1/3/131384249/gegifula.pdfIn PDF document text
    • http://vashastrahovka24.ru/995483756566j3qv.pdfIn PDF document text
    • http://zegererevez.medianewsonline.com/how_to_prepare_for_cfa_exam_level_1.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/tometubufimopim/57313470834.pdfIn PDF document text
    • https://s3.amazonaws.com/mejados/gizabejukedatatawumebo.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxawetawupo/96648903348.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/ue_boom_app_free_iphone.pdfIn PDF document text
    • https://s3.amazonaws.com/zozofufulolig/mewigowujiwobijikija.pdfIn PDF document text
    • https://s3.amazonaws.com/xiwevitox/broadsheet_melbourne_cbd_breakfast.pdfIn PDF document text
    • https://s3.amazonaws.com/wonumafubij/91823414757.pdfIn PDF document text
    • https://s3.amazonaws.com/gomakobez/bull_bull_film_video_songs.pdfIn PDF document text
    • http://bitines.myartsonline.com/amana_80_sse_air_command_gas_furnace_reset_button.pdfIn PDF document text
    • https://s3.amazonaws.com/tugabijenovili/30722083229.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_off0000f642.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF642 5392 bytes
SHA-256: 1e845964a125e3106d887093cf432f621d8a6e1d84fde75a2ca7638ca59a7b57
font_01_sfnt_off000108cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108CC 11556 bytes
SHA-256: 9b0503d85bbe11604f32dd334e20c1eaf60be7fa6cb385188cb059041b49ae66

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