Malicious PDF — malware analysis report

Static analysis result for SHA-256 576a6d36860f760c…

MALICIOUS

PDF

94.7 KB Created: 2021-05-22 12:56:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: fcca2505a12b9e8a17cfb6cd7c79da79 SHA-1: df04d08864ba5ce4892095692b75223661172622 SHA-256: 576a6d36860f760cb929195dfcc8f421bb258ba532f925b98d5a2dfa57793423
136 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is a phishing lure, specifically using an image to redirect users to a malicious URL. The embedded URL, https://xezojetit.ru/strik?utm_term=allen+biology+notes+pdf+download, is identified as a redirector for phishing. ClamAV also detected this file as a phishing trojan.

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://xezojetit.ru/strik?utm_term=allen+biology+notes+pdf+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369150/normal_600a41f318a06.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477387/normal_5fddaf7e77a46.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500670/normal_5fe956f631650.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417306/normal_6011deb4e030b.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/datarofapakil/34800869977.pdfIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/how_to_setup_bryant_thermostat.pdfIn PDF document text
    • https://s3.amazonaws.com/viromibukoleliw/51522562118.pdfIn PDF document text
    • https://s3.amazonaws.com/tanapilamaxi/wojofi.pdfIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/autodesk_vault_client_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/palevijuj/what_food_can_you_eat_on_the_dash_diet.pdfIn PDF document text
    • https://s3.amazonaws.com/sepawi/estate_agent_marketing_plan_template.pdfIn PDF document text
    • https://s3.amazonaws.com/xetasif/aviwest_pro_380.pdfIn PDF document text
    • https://s3.amazonaws.com/banula/self_esteem_quiz_printable.pdfIn PDF document text
    • https://s3.amazonaws.com/sowirutelevolur/christmas_piano_solo_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/midnight_sun_part_2_movie_release_date.pdfIn PDF document text
    • https://s3.amazonaws.com/fajeloninesitel/1520372764.pdfIn PDF document text
    • https://s3.amazonaws.com/vukusa/caldera_forms_payment_processors.pdfIn PDF document text
    • https://s3.amazonaws.com/sonutopexaramuf/art_style_guide_video_game.pdfIn PDF document text
    • https://s3.amazonaws.com/nutanigonu/c._r._o_full_form.pdfIn PDF document text
    • https://s3.amazonaws.com/kujapomib/actividades_de_alimentacion_saludable_para_nios.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/how_to_sync_sharper_image_bluetooth_headphones.pdfIn PDF document text
    • https://s3.amazonaws.com/zamuriza/babbel_apk_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jokotaziweluge/satofudobin.pdfIn PDF document text
    • https://s3.amazonaws.com/ximupuv/pivimonix.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off000148f1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x148F1 11412 bytes
SHA-256: 0b91879ae964da53c6aeb4508653081a8c33185a43d7e618262a90e15cf0a215
font_00_sfnt_off0000f8a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8A2 5436 bytes
SHA-256: f1d2efa08f89c69c1a448ecb21f0e5b10f0acc9368b0734274d733ff3c80d34b
font_01_sfnt_off00010b50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B50 11788 bytes
SHA-256: 673b1ed757a95686229673460e3f2760c5ffc45667ce365844e2e43d6c22e125
font_02_sfnt_off00013386.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13386 16204 bytes
SHA-256: 541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501