Malicious PDF — malware analysis report

Static analysis result for SHA-256 a59d15ad3b4ed2d1…

MALICIOUS

PDF

89.4 KB Created: 2021-04-02 08:04:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6e68c02868691ea35b7851cc2ac733ea SHA-1: 71fdfe96500c41de85fa8e3b6f0e1a008d9e7fac SHA-256: a59d15ad3b4ed2d11441895b7f08e5e17d14fa8f5e7774c97521b8059ea970d6
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a malicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The document body, though heavily obfuscated, suggests a lure related to 'reading compass study guide questions', indicating a phishing attempt. The presence of an external URI heuristic further supports the malicious intent of directing users to a potentially harmful website.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://ponafet.ru/wix?keyword=reading+compass+study+guide+questions
    • https://cdn.sqhk.co/rapawaferew/i3ghjdK/92223426789.pdf
    • https://wezenazuzive.weebly.com/uploads/1/3/4/7/134764498/8367276.pdf
    • https://gefivogixofix.weebly.com/uploads/1/3/0/9/130969648/1792236.pdf
    • http://diwejibazetar.iblogger.org/babapukolupov.pdf
    • http://gevowavu.22web.org/biolite_sunlight.pdf
    • http://noriwisisun.iblogger.org/ropexewulew.pdf
    • https://cdn.sqhk.co/xumesapaxoku/qidIjbX/1875101108.pdf
    • https://cdn.sqhk.co/xewafazuk/giawndS/wepakofelozezogifutizir.pdf
    • https://rikelakejif.weebly.com/uploads/1/3/4/8/134885243/801df378c7.pdf
    • https://wunurobi.weebly.com/uploads/1/3/4/8/134881210/leruke_tapub_wawonexapuvimat_lenuw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://gevivosesiz.epizy.com/melifazu.pdf
    • http://xutenasejubibe.atwebpages.com/21558484962.pdf
    • https://uploads.strikinglycdn.com/files/5f3caa70-8abb-46a2-8d1b-638344fb9479/22306998261.pdf
    • https://s3.amazonaws.com/futamo/twilight_new_moon_book_online.pdf
    • https://s3.amazonaws.com/sinadi/58268714932.pdf
    • http://vilepobafomunow.atwebpages.com/29047641637.pdf
    • https://uploads.strikinglycdn.com/files/61e7ea44-39b2-4946-bb77-3ae30634c593/fire_and_ice_movie_poster.pdf
    • https://s3.amazonaws.com/varolexexus/anti_malware_terbaik_free.pdf
    • https://s3.amazonaws.com/liwara/fijopinemiji.pdf
    • https://uploads.strikinglycdn.com/files/ad93acb7-0ebd-428c-9c9b-3ec346b42096/92840923058.pdf
    • http://bilofudako.onlinewebshop.net/ap_calculus_bc_2020_practice_exam.pdf
    • https://s3.amazonaws.com/pulujolatepuv/76222926264.pdf
    • https://uploads.strikinglycdn.com/files/3379be0b-6743-4354-a81a-bcdad05d94d1/black_diamond_storm_headlamp_battery_replacement.pdf
    • https://uploads.strikinglycdn.com/files/2ec1a756-5673-4a15-8eed-984dd7a03feb/sabilexir.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_off00011e40.bin
d45c0dbbdf01a0cfa47aa44a18b896fb1306fc91fecb86a3e67d763eeae2282e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E40 5500 bytes
font_01_sfnt_off000130f4.bin
e801ea68a5d359e22409aba9e97b8a9acc850c785cc6320b295c5e7c7370b715		 pdf-font-stream PDF embedded font (sfnt) at offset 0x130F4 11260 bytes

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