Malicious PDF — malware analysis report

Static analysis result for SHA-256 4644ca5b62b5ad2b…

MALICIOUS

PDF

73.6 KB Created: 2020-12-04 12:28:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 19b6dd3232472ed75628be0fac0d5837 SHA-1: 1f064c08d27f05d142383c8fac5016bb39211586 SHA-256: 4644ca5b62b5ad2b606cc18c0a703f4be98e840da307962f9c739d245eae3757
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 a machine learning classifier and ClamAV as malicious, with a high risk score. It contains an embedded URI pointing to 'trafftec.ru', which is likely part of a phishing or scam campaign. The document body, though heavily obfuscated, contains text related to 'breakfast ideas' and the authoring application, suggesting a lure to a malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafftec.ru/strik?utm_term=ww+simply+filling+breakfast+ideas PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4446635/normal_5fad9a955574f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414701/normal_5fba87408a266.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446634/normal_5fa703a3e8b19.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373755/normal_5f91dbf0395b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402949/normal_5fa68ef638ba3.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/xifabilejilab/hbogo_activate_computer.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5b8d58ef7301f8b31fd81/t/5fc6c6cf0791337046cf16cc/1606862546442/xulololikunub.pdfIn PDF document text
    • https://s3.amazonaws.com/baritexovopa/46610150185.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f3af1c8c741314320bf8/t/5fc26f8308845d0924d8b3f5/1606578052739/51032724528.pdfIn PDF document text
    • https://s3.amazonaws.com/rejiner/catalogo_cuentas_sat.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/30588249693.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0b544c89e1c4b8fbd6471/t/5fc3c21b3485235c863956b3/1606664736210/mesopotamian_civilization_political_system.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e110403f5353fd95a22f/t/5fc10063f81c9a2a0cc5c3f8/1606484067101/zibaka.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc598d9c89e1c4b8fde8ecc/t/5fc99bf1887b444c61504bf8/1607048177739/10730288824.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ace0698c-2a73-4a22-a11e-51157c2a21c4/dodazoxavexabules.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c575997b-219a-41e8-9e16-83f13efa3bf4/red_flags_card_game_review.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA7E 5772 bytes
SHA-256: d4fd675047a428ccbb974720a8325e746bd99ac67d6c3671ad171b9707f91bc9
font_01_sfnt_off0000de30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE30 10864 bytes
SHA-256: 7d33fbb41bfb1914adc9703a562f6207b6d58a9c15ab28dfe19a6e64dd513acc
font_02_sfnt_off00010353.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10353 16376 bytes
SHA-256: f267a97a42ed964490c0c36cf8d24d30f5cfc386ee24850e75bb3a4991f11828

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