Malicious PDF — malware analysis report

Static analysis result for SHA-256 1266259011cbb3e6…

MALICIOUS

PDF

75.2 KB Created: 2021-03-09 21:39:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 07d764b3da0a9d8cae38fc96d9c07874 SHA-1: 697ff5ce48d12ee157de9ee5aa2f8523a80449ef SHA-256: 1266259011cbb3e6dc3fe3708e7af3fbea708b974de21e9874668a914f800109
96 Risk Score

Malware Insights

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

The PDF file contains a heuristic indicating an external URI, which points to a suspicious domain. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The document body, though heavily obfuscated, contains text related to guitar backing tracks, serving as a lure to the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://jottigo.ru/123?utm_term=guitar+backing+tracks+with+vocals+free
    • https://cdn-cms.f-static.net/uploads/4413862/normal_601ec0b0791b6.pdf
    • http://lebedugipul.mywebcommunity.org/mary_rowlandson_puritan.pdf
    • https://cdn-cms.f-static.net/uploads/4484103/normal_60188c7be0197.pdf
    • https://cdn.sqhk.co/regisanozoxo/haWXhar/pottery_barn_christmas_plaid_pillows.pdf
    • https://cdn-cms.f-static.net/uploads/4451049/normal_6031b8b5ecba1.pdf
    • http://ruwemipuwev.mypressonline.com/pibomeder.pdf
    • http://mofonuf.medianewsonline.com/kazirij.pdf
    • https://static.s123-cdn-static.com/uploads/4371809/normal_5fddfac5bb664.pdf
    • https://cdn-cms.f-static.net/uploads/4388165/normal_5fd0b93c15b79.pdf
    • https://cdn-cms.f-static.net/uploads/4451753/normal_6015ec02c86ad.pdf
    • https://cdn.sqhk.co/bapisolel/haWLwDY/xudixov.pdf
    • https://static.s123-cdn-static.com/uploads/4477910/normal_5fe3f7749cfa5.pdf
    • https://cdn-cms.f-static.net/uploads/4455195/normal_6015d86c0f635.pdf
    • https://cdn.sqhk.co/pujapipiwat/fjaIgji/radio_flyer_scooter_ride_on.pdf
    • https://cdn.sqhk.co/perekowemo/qNjaLjc/kezuwenikasona.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/1b86ec2f-0f97-48d3-82c5-c467e4bc1ddf/kupowiwimosakaros.pdf
    • http://dapibudajemuk.atwebpages.com/how_many_questions_are_on_a_cdl_air_brake_test.pdf
    • https://uploads.strikinglycdn.com/files/785cba10-2548-4228-832c-51e19e94c8ea/78140129910.pdf
    • https://s3.amazonaws.com/xoguwavosuje/aimbot_gta_san_andreas_multiplayer.pdf
    • https://uploads.strikinglycdn.com/files/4ca5a288-1424-43b4-8f4a-121306371e0f/blank_100_chart_printable.pdf
    • https://s3.amazonaws.com/zalisujezajaje/hillsborough_schools_calendar_2020.pdf
    • https://uploads.strikinglycdn.com/files/d358ce2a-2489-4142-a712-3f6c7959e18f/how_to_connect_jbl_flip_3_with_laptop.pdf
    • https://uploads.strikinglycdn.com/files/ae2a4662-6a02-4985-b824-012928a4a294/8253814032.pdf
    • http://mewabetowa.myartsonline.com/gotiju.pdf
    • https://s3.amazonaws.com/gimisorixosu/padorekobegexugo.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e67a.bin
a7c9092d9f9c5100fdb61a54b9674c4be6ec438c2b45bf68b9e06623720d2695		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE67A 5532 bytes
font_01_sfnt_off0000f968.bin
a26c9fc16fcde91741f9c1dfa30e866c6251b8693ed53368effc2104ef5f476d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF968 11108 bytes

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