Malicious PDF — malware analysis report

Static analysis result for SHA-256 2af158d3dd96fe53…

MALICIOUS

PDF

76.1 KB Created: 2021-01-14 23:46:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 30814158062f0a6b6bbe65beb28f01ec SHA-1: 9abf3c8e3a20d9c7df5cd70c583c1391ce616bc7 SHA-256: 2af158d3dd96fe53d4b20c072f42aefa8733ec6b018a07cf30674f90710e2e38
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating high maliciousness. The PDF contains a large number of external links, forming a link farm, with the primary URL being 'https://traffset.ru/aws?utm_term=bob+marley+redemption+song+acoustic'. This suggests the document's purpose is to redirect users to a network of other PDF files, likely for SEO manipulation or to distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffset.ru/aws?utm_term=bob+marley+redemption+song+acoustic PDF link annotation
    • https://site-1168148.mozfiles.com/files/1168148/the_child_of_slendrina_hindustan_gamer.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450037/normal_5fc4e8f44d215.pdfIn PDF document text
    • https://kinijanara.weebly.com/uploads/1/3/4/5/134585029/920534.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447662/normal_5fc931ac1a5d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377908/normal_5fab828e449db.pdfIn PDF document text
    • https://site-1198644.mozfiles.com/files/1198644/sling_drift_apk_hile.pdfIn PDF document text
    • https://site-1166656.mozfiles.com/files/1166656/kart_stars_mod_apk_revdl.pdfIn PDF document text
    • https://site-1173584.mozfiles.com/files/1173584/robot_shark_2_mod_apk.pdfIn PDF document text
    • https://site-1168537.mozfiles.com/files/1168537/40603222774.pdfIn PDF document text
    • https://zasuzepomuban.weebly.com/uploads/1/3/4/6/134627511/wiguvapanifox.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371266/normal_5ff5216d30b40.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380380/normal_5feef8d8798dc.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/dinisemowoge/www.hotmail.com_login_mail.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB28 5684 bytes
SHA-256: 4c02f564f9970cf08d6dcde00b3c1181739a45753cfe343f1355580863019323
font_01_sfnt_off0000fe67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE67 10692 bytes
SHA-256: a2a55fdb45066f8e6384bd5abf8790506b8f2fc6c40097169142d2bc8893d635

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