Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d2eed055b9ae62d…

MALICIOUS

PDF

86.7 KB Created: 2020-12-08 08:23:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 4d8affbf0c05451895128a3e41fd984c SHA-1: eb464bc10caaf46c6095ece675be79efc267f84b SHA-256: 5d2eed055b9ae62d771830f990766c9567e47b0b64ee55a85bbd2ba918e5dd78
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as a PDF link farm. One of the primary external URIs points to 'trafftec.ru', which is associated with a keyword search for 'devotional songs free in tamil', suggesting a deceptive lure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

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://trafftec.ru/wb?keyword=devotional%20songs%20free%20%20in%20tamil PDF link annotation
    • https://pumutetigowon.weebly.com/uploads/1/3/4/6/134699291/jinejebovesoduk-dipunozep-vuzuv.pdfIn PDF document text
    • https://vemewibikem.weebly.com/uploads/1/3/0/7/130776349/masaweguwi.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/nerugiraxura/zununikuzelizafufix.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd03a764a3cc4058a57d0b/1606222760622/28757960197.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcfa033ca23154c95b3d2a/1606220292990/87723779444.pdfIn PDF document text
    • https://s3.amazonaws.com/jadere/kumpulan_game_android_apk_obb_offline.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1c3d140f1034a5caf136a/t/5fc2baf7145a8629dc0a6732/1606597368060/the_book_thief_activities.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0cf3a5e8e827d428d5c84/t/5fc1a9905147b14804718f64/1606527376629/walt_disney_world_logo_transparent.pdfIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/24415254019.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe07e33c6ccf69f325a514/1606289379094/75224331478.pdfIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/46615732507.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/calcutta_university_migration_form.pdfIn PDF document text
    • https://s3.amazonaws.com/tadevewuju/copper_complex_ions_chemguide.pdfIn PDF document text
    • https://s3.amazonaws.com/widuxade/solefufe.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_off000114b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114B9 5148 bytes
SHA-256: 9959e93912a75b3897e8e5a9c52d61f605610b1d3bd094cb335a3604e0b9030f
font_01_sfnt_off00012635.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12635 11460 bytes
SHA-256: 93ca155daca9ab43dd006a8a38821aafded830a9055f852c014fcaa23c5d5d2c

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