Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4d61ff89614e664…

MALICIOUS

PDF

82.4 KB Created: 2021-03-20 09:50:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: e30d4bd37df1d5e95d4c9f29d91a6bb6 SHA-1: 23bb7795b2be2c2e8310add5392b45d84cb57a4e SHA-256: b4d61ff89614e66428adde982221f146d49270e9da6363c50d8186377b100235
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://crophysi.ru/wix?keyword=dirt+devil+quick+flip+user+manual'. This indicates the document's primary purpose is to lure users to a potentially malicious site. The ML classifier and ClamAV detection further support its malicious nature. Although no scripts were explicitly extracted, the embedded URL is a strong indicator of a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://crophysi.ru/wix?keyword=dirt+devil+quick+flip+user+manual In PDF document text
    • http://trenolgia.buzz/tonight_west_side_story_piano_sheet_musickvnep.pdfIn PDF document text
    • http://itfamily.info/linear_graphs_worksheet_tesw1ydc.pdfIn PDF document text
    • http://kepukarob.sportsontheweb.net/pijirerezuzawile.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwefuxab/emGhjAJ/goodreads_giveaways_cost.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvexajamu/jgcicnw/cnc_machines_for_home_use.pdfIn PDF document text
    • https://cdn.sqhk.co/nuxegaxujifo/ySghhgQ/roja_naa_songs_ringtones_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/rotexopapi/Jifhjgn/hobby_lobby_bristol_ct.pdfIn PDF document text
    • http://sarkife.site/how_to_fix_an_hp_printer_that_is_offline5y8rb.pdfIn PDF document text
    • http://jojidasusesot.sportsontheweb.net/speed_learning_cartomancy_fortune_telling_with_playing_cards.pdfIn PDF document text
    • http://help-copyrightviolationhelpcenter.com/pufidewuwofijawitadizunowe5e.pdfIn PDF document text
    • http://meetsoda.club/botojikokiweboregezidam9mkkh.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/selivuvumepaveb/44778174569.pdfIn PDF document text
    • http://perexuwofogefo.onlinewebshop.net/91857175090.pdfIn PDF document text
    • https://s3.amazonaws.com/midipes/govowebajasumajo.pdfIn PDF document text
    • https://s3.amazonaws.com/sazariwapa/79510440968.pdfIn PDF document text
    • https://s3.amazonaws.com/pubopelej/71373911933.pdfIn PDF document text
    • https://s3.amazonaws.com/niporofez/the_lion_the_witch_and_the_wardrobe_character_symbolism.pdfIn PDF document text
    • https://s3.amazonaws.com/xurixado/29692435004.pdfIn PDF document text
    • https://s3.amazonaws.com/pekatikisuruki/begij.pdfIn PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/do_walmart_associates_get_a_discount_on_tires.pdfIn PDF document text
    • https://s3.amazonaws.com/xufujofaleki/finanzas_personales_para_dummies_vicente_hernndez.pdfIn PDF document text
    • https://s3.amazonaws.com/nilafafakem/aufklrung_literatur_merkmale.pdfIn PDF document text
    • http://mewabetowa.myartsonline.com/journal_el_watan.pdfIn PDF document text
    • https://s3.amazonaws.com/tiduro/costco_lasko_superfan_max.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_off000103b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103B2 5552 bytes
SHA-256: 7034b972f839cada9353c868a74c1f5016d14e4948d4292bd762bf71f786cec8
font_01_sfnt_off00011689.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11689 11424 bytes
SHA-256: 3fd5eb73346ff43fa3474591cc83ca5081f4b316be50a94c3841fd3c3c29f01f

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