Malicious PDF — malware analysis report

Static analysis result for SHA-256 556a18e0584035c3…

MALICIOUS

PDF

75.6 KB Created: 2020-12-27 01:44:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 3cd1c2202f4372774a1ef4aea6fd5d79 SHA-1: d3150cf49481c419a4f6c9f99a7c8ed3361efa63 SHA-256: 556a18e0584035c3e0021ea19f8198607613abb8f5e63076b05529a74fb94eec
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The document body, though heavily obfuscated, suggests a lure related to a 'Mighty Mule 502 manual'. No scripts were extracted from this sample.

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/123?utm_term=mighty+mule+502+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369330/normal_5fbfd74049bed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409238/normal_5fbf369b970b7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412183/normal_5fe142270aee1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369142/normal_5fd78678b5817.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377381/normal_5fd6987ab6042.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368977/normal_5fb8737d6b3d2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/27592150-4a9f-4eb2-9e0c-2c7d991935e3/monster_hunter_world_switch_release_date.pdfIn PDF document text
    • https://s3.amazonaws.com/nademopor/58019401910.pdfIn PDF document text
    • https://s3.amazonaws.com/bivanud/mortal_kombat_flash.pdfIn PDF document text
    • https://s3.amazonaws.com/fovezewi/38092231384.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/sniper_team_unblocked.pdfIn PDF document text
    • https://s3.amazonaws.com/xeropizuwe/nbc_directv_channel_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/bededuxotulapil/criminal_justice_reform_bill_singapore.pdfIn PDF document text
    • https://s3.amazonaws.com/nuruvapozixix/first_world_war_in_tamil_video.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_off0000e925.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE925 5328 bytes
SHA-256: 31108c2ad077c5d856c4724256f03446087c7caef48570bf80d280d3f0c7e952
font_01_sfnt_off0000fb3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB3C 11312 bytes
SHA-256: 09469b9d190691df35c256a25a7e9286b646228ad6b2c3e12557b9877e931198

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