Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ea6b29a6e26545e…

MALICIOUS

PDF

73.1 KB Created: 2020-11-19 15:22:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 3ebfefe31eb56121a9bc9c8b2d030256 SHA-1: 8dbcd1c441eb38e36990d4df9ed0df635a185ab1 SHA-256: 6ea6b29a6e26545e25bf1c6a6824b8cd988555893fa6ff475939346528814ebf
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a specific ClamAV detection name indicating it's a phishing trojan. The document body, though heavily obfuscated, contains references to 'Captain America cartoon images' and authoring information suggesting it's a PDF generated by wkhtmltopdf. The presence of an external URI pointing to 'trafficel.ru' suggests a potential phishing or command-and-control communication channel.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafficel.ru/aws?utm_term=captain+america+cartoon+images PDF link annotation
    • https://nuzixusimupe.weebly.com/uploads/1/3/4/3/134306281/dazov.pdfIn PDF document text
    • https://xazaguzomolak.weebly.com/uploads/1/3/4/3/134375957/dopodivawimulu.pdfIn PDF document text
    • https://sazunanul.weebly.com/uploads/1/3/4/4/134488017/d0f0f5b.pdfIn PDF document text
    • https://nurigefisigutip.weebly.com/uploads/1/3/4/6/134628418/840dc.pdfIn PDF document text
    • https://buliduxefexefux.weebly.com/uploads/1/3/1/6/131636978/vowuj_wiwaf_wubitenikutasuz.pdfIn PDF document text
    • https://nimomobef.weebly.com/uploads/1/3/4/4/134458394/zojumabadowa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/99998eeb-f483-4d62-b6a6-1de41da2bb48/72275397459.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b15f801-0ee1-417b-8009-52780ca55912/bed_wars_map.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73a01a21-5c1b-4687-8ab9-2cad5c4b0cb1/12385666085.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bba6f095-a3e4-4e3d-9297-905fd4bedf9d/lejinozujopig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/145a6252-f2b2-432e-aa3d-3feb1fd4243e/mijurosemef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0361fa13-0cd3-490c-9263-cf4163c7dbe8/mutax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/caa3de7f-0680-4f7c-8c0f-6996fa96c799/boy_scout_camp_boxwell.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d2cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2CB 5032 bytes
SHA-256: 56072f03dca427f510c29659dae9138cfca447accd6d7ba93e36c3687014e721
font_01_sfnt_off0000e3c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3C5 11088 bytes
SHA-256: 33df40a0d720171c82e78296fe476cbee11e7fd83153f680a0bcfc6b94b6a195
font_02_sfnt_off00010986.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10986 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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