Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae7d0be36d3246c9…

MALICIOUS

PDF

75.2 KB Created: 2021-03-24 11:28:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4bcc409908f3ee2a27cfabe308ef6e1a SHA-1: ddb9d57d67a996df7bf7ee5b2cf2dabe56e00474 SHA-256: ae7d0be36d3246c94e68c054e1834f8bb80d73497d77529ce74664656a4f48c2
96 Risk Score

Malware Insights

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

The file is a PDF that contains an embedded URL designed to trick users into downloading further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The primary attack vector appears to be social engineering, masquerading as a search result for a textbook to entice a download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://seumenha.ru/award?keyword=bailey+and+love+s+textbook+of+surgery+27th+edition+pdf
    • http://fastgetme.online/what_is_narrative_filmmaking7fs8e.pdf
    • https://tutuludoj.weebly.com/uploads/1/3/0/8/130874598/ac022c6105aa.pdf
    • https://segamivudafipem.weebly.com/uploads/1/3/2/7/132740242/solinevuwig.pdf
    • https://jipofaxinevafud.weebly.com/uploads/1/3/4/3/134350183/9aa36e3a02ff3.pdf
    • http://form-copyrightservices.com/85915431845iimu3.pdf
    • http://biwumani.mywebcommunity.org/arti_left_hand_path.pdf
    • https://vimosetadasosus.weebly.com/uploads/1/3/2/7/132740377/xarikuvavanaw.pdf
    • http://zekifafeter.scienceontheweb.net/45501645566.pdf
    • http://zikevamakag.mygamesonline.org/virekuziwupurujax.pdf
    • http://topstudy.fun/bekikenih1v5u.pdf
    • http://mufosubofamar.mywebcommunity.org/alistair_macleod_short_stories.pdf
    • http://kvadro63.ru/how_many_watts_does_the_jbl_xtreme_2_have49qgz.pdf
    • http://helps-lnstagramcopyrights-about.com/pengertian_obat_analgetik9dly7.pdf
    • http://podarokinsta.site/tom_sawyer_theme_song_tagalognydgc.pdf
    • http://usene.xyz/90379196162ntvnu.pdf
    • http://dodemul.mygamesonline.org/air_cooled_chiller_trane.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/e9ce318f-b893-45f1-94db-dfd5913c1d00/31846066477.pdf
    • https://uploads.strikinglycdn.com/files/be8197d6-e5e9-41c2-a06d-d5f9fe8e076c/ferrari_812_superfast_black_price.pdf
    • https://uploads.strikinglycdn.com/files/e490fd08-8675-413e-9f23-ebeb53d2c4ed/safe_haven_nicholas_sparks_summary.pdf
    • http://moxuzaridob.onlinewebshop.net/67390035777.pdf
    • http://jozobudesurarab.onlinewebshop.net/9225340622.pdf
    • http://kipazafar.atwebpages.com/zitujolopozubijif.pdf
    • https://uploads.strikinglycdn.com/files/9be0ef1e-0b3a-4286-84ca-d9dc09356c93/how_to_troubleshoot_home_thermostat.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_off0000e629.bin
d3956953bb5108a46e675c76a6d1b824aaf09e74b8ff47b8f1fda5892b8412af		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE629 6000 bytes
font_01_sfnt_off0000faa7.bin
64d1bcbbe7e66d14f25fd5977d6ae89ae475f4ae92234dcdc544d86b61c785e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFAA7 10652 bytes

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