Malicious PDF — malware analysis report

Static analysis result for SHA-256 a553079a83c27eed…

MALICIOUS

PDF

70.5 KB Created: 2021-01-10 14:29:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: e0d4d5f9802df18db661b8a063f41218 SHA-1: e08d366c2c422a7a0d8878bc5bf8c43d9da3f2eb SHA-256: a553079a83c27eed0aab03fb63ee14e7dbfbd2b34b98518114f3fc3b83714782
104 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically identified as a phishing trojan. It contains an embedded URL pointing to 'traffine.ru', which is likely used to deliver a malicious payload, such as an APK. The presence of a visual download button further supports the phishing lure.

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffine.ru/123?utm_term=dragon+ball+z+unreal+apk+download PDF link annotation
    • https://cdn.sqhk.co/zupuguvawaj/rifgjhf/78484232396.pdfIn PDF document text
    • https://cdn.sqhk.co/pevelefotuve/dgOigbh/fefirevakafapodekovawowuz.pdfIn PDF document text
    • https://site-1172732.mozfiles.com/files/1172732/dolemukivonitipoxulegi.pdfIn PDF document text
    • https://site-1174368.mozfiles.com/files/1174368/loburomedaruvufajet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366676/normal_5f89f09bf0883.pdfIn PDF document text
    • https://cdn.sqhk.co/jegamaxegev/0jhiatC/neogeo_x_gold_limited_edition_console.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408463/normal_5fa39eef2ca56.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/kodipopujufipig/facility_maintenance_plan.pdfIn PDF document text
    • https://s3.amazonaws.com/defujo/visual_merchandising_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/45783285263.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/70505595364.pdfIn PDF document text
    • https://s3.amazonaws.com/kabisebax/montgomery_little_league_softball.pdfIn PDF document text
    • https://s3.amazonaws.com/jipowumat/4449893643.pdfIn PDF document text
    • https://s3.amazonaws.com/tumasun/love_boat_guest_star_template.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_off0000d71e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD71E 5296 bytes
SHA-256: c40344a86a410ed2cc039d70a1d0690fbaa56b3af0d7ee7b26febbc878d41c66
font_01_sfnt_off0000e94b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE94B 10632 bytes
SHA-256: 13b99c5469ad33b087a3c8883cc51ddbef119bd6ac2e54953912a4f3a119b8d3

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