Malicious PDF — malware analysis report

Static analysis result for SHA-256 f439f37006a22546…

MALICIOUS

PDF

76.0 KB Created: 2021-03-17 02:26:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: ed562b50cad431f0f69cee7bfe9f5024 SHA-1: 3d3af6fcf3d089ce8c30844bf856c06958fd75ef SHA-256: f439f37006a225467f9fab2326367fe2be842223665e88ec169aff002c94141f
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 0.9997

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://vilenefex.ru/wix?keyword=jigsaw+quotes+from+saw PDF link annotation
    • https://cdn.sqhk.co/kenipafitu/ggxNhcv/87412267422.pdfIn PDF document text
    • https://ladozazewuse.weebly.com/uploads/1/3/4/0/134095850/b943bd3.pdfIn PDF document text
    • https://jobawanajofuru.weebly.com/uploads/1/3/4/0/134042661/dajivivetik_pixapigetonese_kiwimikotinev.pdfIn PDF document text
    • https://toroborelap.weebly.com/uploads/1/3/4/8/134867907/7916177.pdfIn PDF document text
    • https://kolekidir.weebly.com/uploads/1/3/4/4/134441437/tududefusiwobe-wivikifo-mejaju.pdfIn PDF document text
    • https://fikuvigobe.weebly.com/uploads/1/3/4/5/134582673/5f8a35009e.pdfIn PDF document text
    • https://wesafave.weebly.com/uploads/1/3/4/3/134307961/ab91a8f.pdfIn PDF document text
    • https://valodoxajub.weebly.com/uploads/1/3/4/4/134435871/7003953.pdfIn PDF document text
    • https://karinavoru.weebly.com/uploads/1/3/4/0/134017817/9323196.pdfIn PDF document text
    • https://fuwefepitebu.weebly.com/uploads/1/3/4/7/134709748/rukiwul.pdfIn PDF document text
    • https://cdn.sqhk.co/tefozakozup/gfSheO1/top_40_french_songs_2020.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/robumuduluwise/just_2_words_plus_463.pdfIn PDF document text
    • https://s3.amazonaws.com/loneminovu/add_server_certificate_to_android_studio.pdfIn PDF document text
    • https://s3.amazonaws.com/nuruvapozixix/95981241906.pdfIn PDF document text
    • https://s3.amazonaws.com/megulu/16701818231.pdfIn PDF document text
    • https://s3.amazonaws.com/rafiralexezol/21972335190.pdfIn PDF document text
    • https://s3.amazonaws.com/xilasisefi/bowditch_method_of_adjusting_a_traverse.pdfIn PDF document text
    • https://s3.amazonaws.com/ropidadegaxut/64103283194.pdfIn PDF document text
    • https://s3.amazonaws.com/pululusodogi/chota_bheem_full_movie_bali.pdfIn PDF document text
    • https://s3.amazonaws.com/xarojapi/do_all_kitchenaid_mixer_bowls_fit.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB4C 5264 bytes
SHA-256: 3c043460104e482fc95ca4368373b9b84888530e1005162b74a93529f3e6f6f7
font_01_sfnt_off0000fd31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD31 10596 bytes
SHA-256: 07824ba5212961bb6424ce7a9e77ff01db61747d2f59c69c1674b1b8def8fd15

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