Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8b294d16be6d108…

MALICIOUS

PDF

93.2 KB Created: 2020-11-11 15:16:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: b3bae0f4f45b368af76c197368746834 SHA-1: b3edee44b050590f7a2cbf927fe32a2bd0df2cfb SHA-256: c8b294d16be6d108b0a3d607220a7a8f86d4014cfa295fda76efd01ce8c73180
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a heuristic indicating an external URI, specifically 'https://traffnew.ru/aws?utm_term=eclipse+must+declare+named+package'. This URL is presented in a context that suggests a phishing or social engineering attempt, aiming to trick the user into visiting the malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://traffnew.ru/aws?utm_term=eclipse+must+declare+named+package PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366324/normal_5f928f801c18f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370989/normal_5fa9e200e0829.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379231/normal_5f9462906fb81.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376380/normal_5f95c201dec0f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374951/normal_5f9ede6b32578.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/mipizaju/sased.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85a6bd50-006d-4739-acec-848aa85b8d58/microwave_ovens_lowe_s.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e850fea8-bc7d-4bb7-b677-365b4417327b/46737333865.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24be4b2a-623e-4ed1-8899-6c7b6912b0bb/nosonisukusogepapoxirifi.pdfIn PDF document text
    • https://s3.amazonaws.com/wejuvono/landscape_paintings_of_italy.pdfIn PDF document text
    • https://s3.amazonaws.com/wajibile/clash_of_clans_building_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81f62728-5067-4ad8-b5c2-b624d46c1b2d/98038455771.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b38c626d-1bba-497c-b40d-7d6f1880e1c6/us_constitution_crossword_puzzles_advanced_1.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA1B 2900 bytes
SHA-256: 68d094faf81d2ea9f62e68ee4e789e40b6192f27e323b9e50c58fbaa8f881837
font_01_sfnt_off0001045e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1045E 5416 bytes
SHA-256: 3546bf44bf11a555df4afaf898a3004f05c5c82dc26535020db7c9348b29865e
font_02_sfnt_off000116ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116AD 1648 bytes
SHA-256: 71ed7777df633bcdafb221e4b97748f029842b21a6b539cbd3a2681e07eb4123
font_03_sfnt_off00011eee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EEE 15544 bytes
SHA-256: 6a55916d808f3254e4acb4d4f1723b38a8e44fc1d2f3fdc31652d2029b2b908a
font_04_sfnt_off00014fbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FBE 16036 bytes
SHA-256: 149cab45689013e99d1aa520d2e5234663aa5d8577b6aae5e423b5d60aeda4c1

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