Malicious PDF — malware analysis report

Static analysis result for SHA-256 5203ab793fc7815a…

MALICIOUS

PDF

72.9 KB Created: 2020-12-27 15:40:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: fed904bed031d6f5f09f046fcbb58bad SHA-1: 1281623190a595127d852e0dfd369b4bd4c50d18 SHA-256: 5203ab793fc7815a526f57c23e9315a73474208d150b180cc2c329416d99fff3
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://traffnew.ru/123?utm_term=difficulty+offset+ark PDF link annotation
    • https://pexafibilo.weebly.com/uploads/1/3/4/4/134484824/duboserududimepa.pdfIn PDF document text
    • https://cdn.sqhk.co/vorowobenune/ogh3wlf/splendor_board_game_rules_nobles.pdfIn PDF document text
    • https://cdn.sqhk.co/gemadaruvow/hhdhhHK/suvolifuvemag.pdfIn PDF document text
    • https://rolewexuvuviwu.weebly.com/uploads/1/3/4/7/134742390/vifujokifun_nijifiton_buvus_zekedomomuzupa.pdfIn PDF document text
    • https://fotejisatowonu.weebly.com/uploads/1/3/2/3/132302873/dilozanuzebew_fujodako.pdfIn PDF document text
    • https://cdn.sqhk.co/minamojazi/KjggfKH/hillside_drive_shrewsbury_house_for_sale.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/simujix/xbox_360_wireless_controller_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/bubeto/panchtantra_ki_kahani_in_hindi_download.pdfIn PDF document text
    • https://s3.amazonaws.com/jidosatikim/sorerokoxosukexesutosigu.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxenipup/notesejurab.pdfIn PDF document text
    • https://s3.amazonaws.com/fajeloninesitel/kutapakesudobajot.pdfIn PDF document text
    • https://s3.amazonaws.com/mamibis/smart_chicken_sky_factory_3.pdfIn PDF document text
    • https://s3.amazonaws.com/bezutu/81578070439.pdfIn PDF document text
    • https://s3.amazonaws.com/podawakumepewez/maxavipo.pdfIn PDF document text
    • https://s3.amazonaws.com/mujesogi/69187700739.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_off0000df8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF8B 5040 bytes
SHA-256: 3dc48f355496dece676d3d29979a0e403f47f6aade5461c4dfda436bb85ca5ee
font_01_sfnt_off0000f0dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0DC 11088 bytes
SHA-256: 53529ffd4121adf42df64ceb01009978052f4ce8943f99ef38eb458bd87df591

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