Malicious PDF — malware analysis report

Static analysis result for SHA-256 1473c15d9c145556…

MALICIOUS

PDF

78.9 KB Created: 2021-03-11 14:50:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 1b38bedbfefea94fcfd31af9f69e0e45 SHA-1: 52aabf319b8fee121fdce62de1ec0e3ea8367b39 SHA-256: 1473c15d9c1455565b4e1884f0bd6f74308add3b6216105abb24fa3a0e3733a3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file was flagged as malicious by multiple heuristics and an ML classifier, indicating a high likelihood of malicious intent. The PDF_SEO_LINK_FARM heuristic indicates the presence of a large number of external links, with the primary suspicious URL being https://soxebez.ru/award. This suggests the document is likely used for SEO manipulation or to distribute further malicious content, potentially exploiting PDF vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://soxebez.ru/award?keyword=amnesia+anterograda+y+retrograda+pdf PDF link annotation
    • https://cdn.sqhk.co/jisepozidis/ghhdicj/daily_planner_with_time_slots_uk.pdfIn PDF document text
    • https://cdn.sqhk.co/bibilofefi/pph1Wgj/mudding_four_wheelers_for_sale.pdfIn PDF document text
    • https://cdn.sqhk.co/zonigita/ugcBagc/shark_bites_fruit_snacks_90s.pdfIn PDF document text
    • http://lifolibi.sportsontheweb.net/how_do_i_change_the_battery_in_my_motorola_baby_monitor.pdfIn PDF document text
    • https://cdn.sqhk.co/malevevipali/0jcghic/skillmill_treadmill_benefits.pdfIn PDF document text
    • http://figimumagoko.mygamesonline.org/kaposedofobed.pdfIn PDF document text
    • https://cdn.sqhk.co/foropogajag/odFgdij/golf_practice_cage_diy.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sezebepit/disable_cell_broadcast_messages_in_android.pdfIn PDF document text
    • https://92fa68c6-d088-48c5-94d9-776fe0504fc0.filesusr.com/ugd/5a053b_65614ec495d94d34b455fb7bbbde9b28.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sutawowirosuvuv/does_universal_remote_work_on_toshiba_tv.pdfIn PDF document text
    • http://botuwosolu.rf.gd/terujituvimipalafake.pdfIn PDF document text
    • https://d25e5d79-f3dc-43ab-8538-58f2f4730235.filesusr.com/ugd/898300_67340512ed9746be8d683e3ac2528544.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/werowibovezoje/zojilataminenukomo.pdfIn PDF document text
    • https://s3.amazonaws.com/xajowu/nepoloxulex.pdfIn PDF document text
    • http://lasiliroba.epizy.com/zoxozizuvakur.pdfIn PDF document text
    • https://df256b98-640c-444d-885a-8195c7360722.filesusr.com/ugd/40b9e6_ffc7f9ff45dc4f18943bbd85b2556f75.pdf?index=trueIn PDF document text
    • http://siniligavaxuvul.onlinewebshop.net/nugav.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/cupid_s_bedmate.pdfIn PDF document text
    • https://ebba3e40-d49f-4cc8-b137-373bb1124918.filesusr.com/ugd/384ea4_ce05e9c6828d46ebb92aaef9444441bb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vavale/how_to_overcome_fear_of_pets.pdfIn PDF document text
    • https://s3.amazonaws.com/zasepo/91019779076.pdfIn PDF document text
    • https://s3.amazonaws.com/tabobujimo/parts_of_speech_worksheets_with_answers.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_off0000f3eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3EB 5420 bytes
SHA-256: 415b35ecb6a3af7e3e46ef4b5346c269bbc47ccc8bef12d05036f48cafcfe1ba
font_01_sfnt_off0001064e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1064E 11644 bytes
SHA-256: 62e96209cd1da11d49e92334f39ad64696a258fe0ee1321ebad396d13c136e30

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