Malicious PDF — malware analysis report

Static analysis result for SHA-256 29a5653468b30e22…

MALICIOUS

PDF

69.8 KB Created: 2021-01-21 01:18:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 19a3cb9b2a4658a1ebff25b9f37dc8f7 SHA-1: e7ecb248352362a01400036f9a1bc18fcdaae7f4 SHA-256: 29a5653468b30e22a576c72add9ed3ee0ce1c1edae15e62a61e23bb3f9b40e68
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The embedded URL points to a suspicious domain, likely intended to host a malicious payload or redirect the user to a phishing site. No scripts were extracted, but the PDF structure and embedded URI suggest a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/123?utm_term=thanh+cung+13+tri%25E1%25BB%2581u+audio PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4502245/normal_5fb7a369b8add.pdfIn PDF document text
    • https://site-1171989.mozfiles.com/files/1171989/tugijegelama.pdfIn PDF document text
    • https://site-1083679.mozfiles.com/files/1083679/zerolu.pdfIn PDF document text
    • https://site-1245906.mozfiles.com/files/1245906/sociology_upsc_optional_notes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381541/normal_5f944f3c5fed6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488330/normal_5fc56a7c3a6c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422640/normal_5fd239dfd2a0f.pdfIn PDF document text
    • http://wivejudotimog.22web.org/acute_coronary_syndrome_ppt_free.pdfIn PDF document text
    • https://site-1178066.mozfiles.com/files/1178066/67373603334.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413454/normal_5ff28218363a1.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/gupojakami/66835270633.pdfIn PDF document text
    • https://s3.amazonaws.com/mipizaju/subodebevidijixuj.pdfIn PDF document text
    • https://s3.amazonaws.com/mujevubutukoxu/dexej.pdfIn PDF document text
    • https://s3.amazonaws.com/rolefosiju/mole_concept_chemistry_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/leteraxewe/99422357666.pdfIn PDF document text
    • https://s3.amazonaws.com/tafogusegabomu/cmos_4001_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/baxadelefofibuz/6739699605.pdfIn PDF document text
    • https://s3.amazonaws.com/bokelur/org._apache._hive._jdbc._hivedriver_jar_file.pdfIn PDF document text
    • https://s3.amazonaws.com/jirebonudur/alaska_movie_1996.pdfIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/vutorupawunumakofuzoxale.pdfIn PDF document text
    • https://s3.amazonaws.com/nowonovege/animal_crossing_hair_color_guide_city_folk.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_off0000c767.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC767 5324 bytes
SHA-256: e2d5f99a09e2f878f6e9598c52d58775a5839ea7554e492c6804273506d19628
font_01_sfnt_off0000d943.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD943 21504 bytes
SHA-256: 6f91319e825810c0889658cc58b409bf571a7afe0cf81b43bc73c028498b1403

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