Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f1671090293f809…

MALICIOUS

PDF

84.0 KB Created: 2021-03-11 08:45:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 343e3afdacfe29fd2a16885dc800a5b5 SHA-1: 0a7185585e80b9b2a3bebb1829d5dd44d41fdd72 SHA-256: 5f1671090293f809f03f86ab2b8512f3d66369369accf14dbe8f8bf063d8a869
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/strik?utm_term=equivalencia+de+250+gramos+de+harina+a+tazas'. This indicates an attempt to lure the user to a potentially harmful site. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of malicious URLs suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/strik?utm_term=equivalencia+de+250+gramos+de+harina+a+tazas In PDF document text
    • http://fortysgjdk.fun/74994954209svpr9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378604/normal_603072c5dafdd.pdfIn PDF document text
    • http://fabulouss.space/86541003809ph0cg.pdfIn PDF document text
    • http://tanirexelobixo.iblogger.org/how_did_rebecca_die_daphne_du_maurier.pdfIn PDF document text
    • http://lonumawewexupo.22web.org/71310469163.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384851/normal_6022b239210d9.pdfIn PDF document text
    • http://moneymaya.site/whats_another_word_for_left_out58nm3.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/feliso/ashampoo_burning_studio_2013_completo_crackeado.pdfIn PDF document text
    • https://s3.amazonaws.com/kiremefegonar/will_blue_exorcist_the_movie_be_on_netflix.pdfIn PDF document text
    • https://s3.amazonaws.com/xifabilejilab/mapufurotafuz.pdfIn PDF document text
    • https://s3.amazonaws.com/posaxugidut/because_the_internet_album_zip_sharebeast.pdfIn PDF document text
    • https://s3.amazonaws.com/juwofuxufijup/excel_macros_tutorial_for_beginners.pdfIn PDF document text
    • https://s3.amazonaws.com/jevedijadiki/flywheel_experiment_viva_questions_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/sikuva/word_formation_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/67746129275.pdfIn PDF document text
    • https://s3.amazonaws.com/temujonuwu/l_encyclopdie_de_la_charcuterie.pdfIn PDF document text
    • https://s3.amazonaws.com/dopugaxelelema/what_is_the_easiest_bts_song_to_play_on_the_piano.pdfIn PDF document text
    • https://s3.amazonaws.com/kugelilizibuwum/miwuropifukikonero.pdfIn PDF document text
    • http://livofos.epizy.com/62562860284.pdfIn PDF document text
    • https://s3.amazonaws.com/mefovu/2018_blank_calendar_template_australia.pdfIn PDF document text
    • https://s3.amazonaws.com/zamuriza/does_davids_bridal_sell_suits.pdfIn PDF document text
    • http://jixepewix.epizy.com/apple_tv_model_number_a1392.pdfIn PDF document text
    • https://s3.amazonaws.com/wuzalugiseto/familia_blattidae.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e65f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE65F 5944 bytes
SHA-256: 918310aa4a6e9425fb971c7796380c89689dfa8122a048ea70f7c801fecbfe3f
font_01_sfnt_off0000fa82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA82 15088 bytes
SHA-256: fbacd9743429ff87531c5691f0939b9a68193fbd5b4d340e95ae758f0f783118
font_02_sfnt_off000129f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129F9 16888 bytes
SHA-256: e82286c80fa58fa53e09321315efd7b1a9c61fa8433ab3758975296c80702584

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