Malicious PDF — malware analysis report

Static analysis result for SHA-256 70870c973cf42800…

MALICIOUS

PDF

78.8 KB Created: 2021-03-06 02:55:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: c991838b637516896de5cebe7490fa5e SHA-1: 5946ccc9e97923d5dc1b39a778a53b390790bae7 SHA-256: 70870c973cf4280038ba0d46a2030377c0e4af44e213dd8974564d1a2c241e25
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The document contains a large number of external links, many of which are likely part of a link farm designed to direct users to malicious sites. The embedded URLs suggest an attempt to lure users to phishing or malware distribution pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://nipisod.ru/strik?utm_term=how+to+connect+backbeat+fit+to+computer PDF link annotation
    • https://cdn.sqhk.co/genopeno/t4gjihd/millets_maize_maze_2020.pdfIn PDF document text
    • http://juligum.22web.org/14749785070.pdfIn PDF document text
    • http://lorozetuwivu.medianewsonline.com/gepowixof.pdfIn PDF document text
    • https://cdn.sqhk.co/kunimanujage/xjciaZe/license_plate_tracker_philippines.pdfIn PDF document text
    • https://cdn.sqhk.co/ketusugedi/qgfEbgh/sorogedakezabekibexawa.pdfIn PDF document text
    • http://rugegav.mywebcommunity.org/fallout_4_mods_without_bethesda_account.pdfIn PDF document text
    • https://cdn.sqhk.co/nokowifupe/j9ifzhj/heavenly_sword_and_dragon_slaying_sabre.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/satuja/hamlets_mill_free_download.pdfIn PDF document text
    • http://leperipuf.rf.gd/mebilotilemunubudoxezenin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a581dcdf-fe33-42c6-beb1-195c38f3d34c/26052138720.pdfIn PDF document text
    • https://s3.amazonaws.com/dazinibonofobi/the_art_of_persuasion_aristotles_rhetoric_for_everybody.pdfIn PDF document text
    • https://e3e1c2aa-7f41-47b0-8c2f-d823cb48b857.filesusr.com/ugd/7598fa_40cdf3c11da049c88f38b63dd247a985.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kavalukato/how_to_find_a_google_classroom_class_code.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad6ce9ec-2679-4b64-bf81-dc2c383fc0f2/xanapekojedetogisidol.pdfIn PDF document text
    • https://25f35837-e8ad-4357-b490-8f69bec4165a.filesusr.com/ugd/96c61c_c534195eb25842b2b3717daa5a4ca416.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lixuzo/30306842783.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81a67ef5-39bf-4562-972f-026e7d7e9150/wuwoliwu.pdfIn PDF document text
    • https://8ca15cf9-c5bf-4329-906a-32df3c7b5ab7.filesusr.com/ugd/4ca7f5_2c7577a4b8b14b3f8bc639b9d5dec6c6.pdf?index=trueIn PDF document text
    • https://989eff4c-946f-4221-9817-1a8d60f2082d.filesusr.com/ugd/7edf14_2159851fa5c8423ca864b56298afbaa6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1d6d11b-64b2-45e6-a64a-2137d9a712c2/5263779048.pdfIn PDF document text
    • https://s3.amazonaws.com/xebuvuwov/26596644379.pdfIn PDF document text
    • https://a2fe464c-28d1-4db8-bb2d-552ad9bc2f4d.filesusr.com/ugd/941bb1_096d17add2334dc29bffc6a8c5350470.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7BC 5092 bytes
SHA-256: ae965c8d565c36b535f019d251e4a605b35cfa41ace682381e78cf6ee4aae631
font_01_sfnt_off0000f8fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8FE 10816 bytes
SHA-256: 41a5b6aed496e534042f084bdeb933c43dbb1dce735c43d85ff89365ce4a5d65
font_02_sfnt_off00011dd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DD5 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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