Malicious PDF — malware analysis report

Static analysis result for SHA-256 746579f13c9f8291…

MALICIOUS

PDF

96.1 KB Created: 2021-04-19 08:10:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 5b92fb24fe0b5db58b9bebbbce994c2d SHA-1: 558cfc64485b7cf1c014cbb737f104d74187a101 SHA-256: 746579f13c9f8291c254c80f33542cb99c482acad03555b96894c046625444e5
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jacksth.ru/strik?utm_term=indian+cookery+books+pdf%252Bfree+download PDF link annotation
    • http://arboozfilm.com/arcade_machines_phoenix_azi6hd4.pdfIn PDF document text
    • https://cdn.sqhk.co/sofuxizago/fghyjaC/luwepobog.pdfIn PDF document text
    • http://veronaital.space/sopodecld7s.pdfIn PDF document text
    • https://cdn.sqhk.co/benibavagoge/33HE7hf/theodor_adorno_on_popular_music.pdfIn PDF document text
    • https://soregoba.weebly.com/uploads/1/3/0/7/130739918/rorusutexo.pdfIn PDF document text
    • http://wumiwuzigimo.mywebcommunity.org/nakodotawinos.pdfIn PDF document text
    • http://hookup666.site/linux_shell_scripting_tutorial_free_downloadpup8z.pdfIn PDF document text
    • http://micrometerdigital.xyz/states_of_matter_and_phase_changes_worksheet_answer_key1v3vd.pdfIn PDF document text
    • http://gmetry.online/la_divina_commedia_di_dante_alighieri_inferno9z0ui.pdfIn PDF document text
    • https://jufopikigon.weebly.com/uploads/1/3/4/3/134309667/2122161.pdfIn PDF document text
    • https://cdn.sqhk.co/ninivaxibab/yJzjaie/moorcroft_pottery_artist_signatures.pdfIn PDF document text
    • http://mebevevi.mywebcommunity.org/97882854524.pdfIn PDF document text
    • https://xowiwive.weebly.com/uploads/1/3/1/3/131398234/bc9a19d60154.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/mibiwivanetuj/53252852155.pdfIn PDF document text
    • https://s3.amazonaws.com/fulosobezur/finoken.pdfIn PDF document text
    • http://gapoxuvopa.onlinewebshop.net/effects_of_bullying_on_students_academic_performance.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/microsoft_powerpoint_jeopardy_game_template.pdfIn PDF document text
    • https://s3.amazonaws.com/midizaxopazeji/24771805668.pdfIn PDF document text
    • https://s3.amazonaws.com/sakaburepagase/resumen_del_captulo_7_del_libro_rebelin_en_la_granja.pdfIn PDF document text
    • https://s3.amazonaws.com/sajezife/joraxevezawonazekibapuka.pdfIn PDF document text
    • https://s3.amazonaws.com/gebukil/97019366507.pdfIn PDF document text
    • http://nufiwimuzobo.onlinewebshop.net/what_is_english_composition_2_in_college.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000125c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125C4 5528 bytes
SHA-256: 8c9123a31aaff8e227b8061ad872ef70f1928c4e553b426670e2337a9ddd9699
font_01_sfnt_off000138d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138D7 5484 bytes
SHA-256: bfd45eab15b45f4c6059b4cc5d9b565d4ce5cf1e680c0fc2a8fc9ba19df1c9f6
font_02_sfnt_off00014ba7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BA7 11620 bytes
SHA-256: 8f7502a7ae6a27ae58759163ce408dd0f02061da26b0c25aabc5749a43fdc82a

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