Malicious PDF — malware analysis report

Static analysis result for SHA-256 4397330f9e261663…

MALICIOUS

PDF

111.7 KB Created: 2021-03-10 14:45:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: c9810a478728e369559d38ca7dd7b2d5 SHA-1: 21e1b8b3015e216c6a42106a9c4bc70b26faf789 SHA-256: 4397330f9e261663e5f212c0bf93cc8b6d203eaec6331f92acc766310976d019
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=cloudy+with+achance+of+meatballs+dad+eyes+gif'. This indicates the document's primary purpose is to lure the user to a potentially harmful website. The ML classifier and ClamAV detection further support its malicious nature. No scripts were extracted, but the embedded URL is sufficient evidence for a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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=cloudy+with+achance+of+meatballs+dad+eyes+gif In PDF document text
    • http://hookup750.website/mokutozapozanusadupara33n.pdfIn PDF document text
    • http://triple-doska3.club/lizagawegenebu9y6zp.pdfIn PDF document text
    • https://cdn.sqhk.co/mofosalamo/BjdYwhj/82977676979.pdfIn PDF document text
    • http://xeeewq.xyz/the_tale_of_the_unknown_island_ds0mrf.pdfIn PDF document text
    • https://cdn.sqhk.co/rijomawonuj/ibsPjhq/29478825504.pdfIn PDF document text
    • https://cdn.sqhk.co/netimawifes/0tjhejd/open_camera_premium_mod_apk.pdfIn PDF document text
    • http://bet-info.ru/ingles_basico_para_adultos_gratisez35i.pdfIn PDF document text
    • http://ketuzel.22web.org/how_to_show_data_table_in_excel_graph.pdfIn PDF document text
    • http://servicesforsupport.com/will_a_new_ipad_mini_be_released_in_2020q0zkq.pdfIn PDF document text
    • http://bullbananavannaone.xyz/97412706639ivxwo.pdfIn PDF document text
    • http://redpandarecycling.com/dictionary_english_spanish_translation_freens5my.pdfIn PDF document text
    • http://amorexpo.com/dyson_dc58_animal_handheldm0qso.pdfIn PDF document text
    • http://websecurer.tech/sezupotuzirog9o99n.pdfIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://putesedesupelo.epizy.com/lijegaxekavuvoridafekidur.pdfIn PDF document text
    • https://s3.amazonaws.com/vawoginele/transformers_bumblebee_helmet_voice_mixer.pdfIn PDF document text
    • http://nodibuxirojijok.epizy.com/values_education_curriculum_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/vixikumubebep.pdfIn PDF document text
    • https://s3.amazonaws.com/zulezov/air_pollution_in_kolkata_project.pdfIn PDF document text
    • http://fuvituze.epizy.com/dadiv.pdfIn PDF document text
    • http://vuwadiwotaja.rf.gd/79706820765.pdfIn PDF document text
    • http://nazewomufewe.rf.gd/14856106241.pdfIn PDF document text
    • http://kulinikono.epizy.com/alternating_current_machines_by_puchstein.pdfIn PDF document text
    • https://s3.amazonaws.com/lakadutof/compare_two_excel_sheets_online.pdfIn PDF document text
    • https://s3.amazonaws.com/gifiz/it_comes_at_night_imdb_parents_guide.pdfIn PDF document text
    • http://sirerig.epizy.com/92590875879.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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off000156e3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x156E3 14464 bytes
SHA-256: 73e3a53bb1482b0a12b26e61e34c8aad391fbca64bb3f4385be74c17859f9c56
font_00_sfnt_off000139bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139BD 2888 bytes
SHA-256: a34f6133241b0e53c3cfe1f853016e916a3d7180b6d3b88390408fd04f35e9f6
font_01_sfnt_off00014401.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14401 5576 bytes
SHA-256: 14c564931f0e377f5047bce9a4c7974291443c30bccf066e14b544b0e2478f3a
font_03_sfnt_off00017f45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17F45 16156 bytes
SHA-256: 9f4eb68957570708ddd1a5528014bc3eb3c56c6bd1ea76a0aa9012454fb5dae3

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