Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac1d39bb2195abad…

MALICIOUS

PDF

77.5 KB Created: 2020-11-23 08:36:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b87afd2bd8fa83c3acaf9353e987470c SHA-1: 1148861abfacddf2deffb908af3eea1d05747b86 SHA-256: ac1d39bb2195abada9eb7a88d8c0e84575ae3db00eb6e7a78b7182a96459ec72
96 Risk Score

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, specifically as a phishing trojan. The embedded URL points to a domain that appears to be involved in phishing activities, likely to harvest user credentials. The document body, though heavily obfuscated, contains text related to 'Consumer reports login username password', reinforcing the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffset.ru/aws?utm_term=consumer+reports+login+username+password
    • https://cdn-cms.f-static.net/uploads/4367631/normal_5f875f0fb8201.pdf
    • https://cdn-cms.f-static.net/uploads/4370270/normal_5f8ac727ca35e.pdf
    • https://cdn-cms.f-static.net/uploads/4370285/normal_5f89bb91e506b.pdf
    • https://cdn-cms.f-static.net/uploads/4446492/normal_5faa79965a6d0.pdf
    • https://cdn-cms.f-static.net/uploads/4393026/normal_5f9bca1e9d067.pdf
    • https://cdn-cms.f-static.net/uploads/4392668/normal_5f9c96dfa4638.pdf
    • https://cdn-cms.f-static.net/uploads/4485695/normal_5fb6023df3bdf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/a1db1713-883f-473e-a288-958b0b2e57fa/cannibalism_in_the_cars_satire.pdf
    • https://uploads.strikinglycdn.com/files/ac6d3bf6-a69c-419b-8a70-2229f498cf4c/6847688157.pdf
    • https://s3.amazonaws.com/xabalaru/free_2003_saturn_ion_owners_manual.pdf
    • https://uploads.strikinglycdn.com/files/71d785a2-a555-4848-a5d1-96c1e948b522/wotujapowibifijexu.pdf
    • https://s3.amazonaws.com/tamobalasu/axeda_iot_platform.pdf
    • https://s3.amazonaws.com/biwubeleba/hoodie_template_illustrator_free.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d512.bin
3847fbc041fc23d47217c5c75d3d9dee419abdeeff961d66b797dd8cca962ff0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD512 5276 bytes
font_01_sfnt_off0000e6ef.bin
2d1c02d7faeb7dad5af5d103f135926a0d4fd4e69f3a7da8959d46cf8e88466d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE6EF 3120 bytes
font_02_sfnt_off0000f372.bin
680d5fbebfc24bbbf3b23a6713e26f90587973dcef918c9b12982a828ca03978		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF372 11488 bytes
font_03_sfnt_off00011a76.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11A76 4324 bytes

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