Malicious PDF — malware analysis report

Static analysis result for SHA-256 850eb4d9eeb6ebdd…

MALICIOUS

PDF

69.8 KB Created: 2020-12-20 17:57:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 4497231a0e5d7eb80871cac72479bfc9 SHA-1: 97f274afea5dc04ff720c94e33ba959e23bd9404 SHA-256: 850eb4d9eeb6ebdddcc080b60ef88d8a9ea2a629d4abbb079e49b47565362036
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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://traffking.ru/strik?utm_term=amtlib.framework+cs6+mac PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4376382/normal_5f8b67eb20b38.pdfIn PDF document text
    • https://komuwewolidixat.weebly.com/uploads/1/3/4/8/134871085/fabikowane.pdfIn PDF document text
    • https://surejijal.weebly.com/uploads/1/3/4/5/134525532/rikero-sewisun-wonamafokuz-tokak.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbfd18111f6a419847f67ca/t/5fc292c7f3de5e49b5b848cd/1606587081889/minecraft_cracked_apk_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/zokojaxawefirilopi.pdfIn PDF document text
    • https://s3.amazonaws.com/suxugipipolazog/12210488653.pdfIn PDF document text
    • https://s3.amazonaws.com/novifamigot/16434556870.pdfIn PDF document text
    • https://s3.amazonaws.com/fibesezati/crowdfunding_que_es.pdfIn PDF document text
    • https://s3.amazonaws.com/nuvukivaxiren/halohydrin_formation_of_alkenes.pdfIn PDF document text
    • https://s3.amazonaws.com/pegebunov/saxophone_all_in_one_pro_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/gitipelut/birthday_balloon_png.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c107.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC107 5500 bytes
SHA-256: b5d30c9df44e7a001f0bec5c14b1baa0549452cf814fcd9ed28468d0a7fd89fa
font_01_sfnt_off0000d3bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3BB 3720 bytes
SHA-256: b91f3c26f37c28538ed09035cbea6f9221827f1e30b50c452f08cc820bcc167b
font_02_sfnt_off0000df1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF1E 16032 bytes
SHA-256: b090b6d0a3aa9382f0f2aab2dab9edd4abeb002738783b8eab86b990b5c3f3d8

Open this report in the interactive analyzer, or submit your own file for analysis.