Malicious PDF — malware analysis report

Static analysis result for SHA-256 55bdf3ba0d4a0ed6…

MALICIOUS

PDF

97.4 KB Created: 2021-04-04 00:18:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 1ee1412fdc2fa9d2167083fffa4fdd0f SHA-1: a457c48f275ceb9b3b97638a8384122ce318dce5 SHA-256: 55bdf3ba0d4a0ed609c4c3a47b93d21edcaf39e14d628fddaacb81d20c2f438b
136 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains an embedded URI and an image lure that redirects to the URL https://dugedepap.ru/strik?utm_term=bhaja+govindam+pdf+gujarati. This indicates a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://dugedepap.ru/strik?utm_term=bhaja+govindam+pdf+gujarati PDF link annotation
    • http://lamovingcompany.com/scene_definition_literatureyrot1.pdfIn PDF document text
    • http://mastera-saydinga.ru/2gig_programming_manualet9vy.pdfIn PDF document text
    • http://odebayitrafikhizmeti.com/la_la_land_ukulele_chordskjmpe.pdfIn PDF document text
    • http://koolmaxt.online/96490596749jytn4.pdfIn PDF document text
    • http://karaulovlife.site/how_to_put_baby_in_graco_snugride_35q61bt.pdfIn PDF document text
    • http://zavodtriumf.com/jeep_grand_cherokee_srt8_2008_specs5sr1d.pdfIn PDF document text
    • http://reactivaperu-viabcpi.com/montgomery_ward_sewing_machine_manual_freetqt48.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412380/normal_6031576266354.pdfIn PDF document text
    • http://www-sfr-fr-monespace.com/les_noces_de_figaro_beaumarchaisaphhn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403689/normal_60250e7b82039.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448341/normal_605d8dcec9d73.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458827/normal_5fd03b017ae17.pdfIn PDF document text
    • http://sibuvre.com/wechat_payment_integration2b44l.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381978/normal_603571bb3d759.pdfIn PDF document text
    • http://remastacer.com/numerical_methods_using_matlab_john_h._mathews_kurtis_d._finkf0k94.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.indictrans.orgIn PDF document text
    • https://c0b8f06b-4e98-4d3d-89ef-2f08caba629a.filesusr.com/ugd/0c8cc8_54e63fd6bd944f7f8ed03a2675144bba.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/figidireki/vokejizo.pdfIn PDF document text
    • https://s3.amazonaws.com/sitozi/suwopifexak.pdfIn PDF document text
    • https://2eb5e741-fe40-4e13-9a70-20af0821b154.filesusr.com/ugd/6cf56c_f77b5d440c4e41e886b4918c4d86d4f7.pdf?index=trueIn PDF document text
    • https://931f52e6-cb68-4a93-8e02-54808d33f8b6.filesusr.com/ugd/6290de_0f6f238de4e74ca4a0a4fb24b8bc0efb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kitakilesa/audio_choice_c100_manual.pdfIn PDF document text
    • https://ad5375d1-0dc8-447d-a54b-f1659eeba1ba.filesusr.com/ugd/a4ba79_638fb328d2c84a10a363c159162bad99.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/daniwodug/how_to_fix_a_car_cd_player_that_wont_load_or_eject_discs.pdfIn PDF document text
    • https://s3.amazonaws.com/fadupazageraf/aao_aao_na_baby_ringtone.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://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010053.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10053 5432 bytes
SHA-256: 035737d6f284eea11d6017499c3e80546293c88534bd5ce332c18b009e423ab6
font_01_sfnt_off000112b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112B8 3772 bytes
SHA-256: 4cd60777e265fafd80a6c4ac8a8f541642313e2b1c6670a3899fdf55b12f51bc
font_02_sfnt_off00011e5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E5C 16296 bytes
SHA-256: a43fa1278752a1f46f7b09f817eda3a4246aa15a98bc66dcc936e674000d26c5
font_03_sfnt_off00015142.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15142 10392 bytes
SHA-256: 9f16b1b7ab28f8644923aef202f814096c18c90b20b91ce880595f2c4e874d3f