Malicious PDF — malware analysis report

Static analysis result for SHA-256 613ee0dcbca3801a…

MALICIOUS

PDF

78.7 KB Created: 2021-03-26 09:03:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b19010ba0f18237b767080ade3b80332 SHA-1: 9fa568b915aa41cd6f7246cac2e2c05adba3d5cd SHA-256: 613ee0dcbca3801ae4304300e2ffe132095a8bc01002a3055462c7ab4b62e1e6
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are to other PDFs, suggesting a link farm for SEO manipulation. One of the primary external URIs, 'https://seumenha.ru/wix?keyword=finral+and+vanessa', is likely part of this malicious infrastructure. The ClamAV detection and ML classifier also indicate malicious intent, consistent with phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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/wix?keyword=finral+and+vanessa
    • http://mebotus.mypressonline.com/dujavodadesuxubur.pdf
    • https://ruzamugube.weebly.com/uploads/1/3/4/0/134040566/jotatu.pdf
    • https://tazegeravi.weebly.com/uploads/1/3/5/3/135390309/mabajogaxuxerep-tejaravugor.pdf
    • http://gajonedorebuko.mywebcommunity.org/advantages_and_disadvantages_of_time_series_analysis.pdf
    • http://gejejasofubi.mywebcommunity.org/sagegavilojisebekalo.pdf
    • https://cdn-cms.f-static.net/uploads/4388283/normal_6031ae86879e6.pdf
    • https://static.s123-cdn-static.com/uploads/4422145/normal_5fdd4a7e6de64.pdf
    • http://kugewezebuvigiw.mygamesonline.org/election_2020_list.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/6a98e6ba-920e-42c5-ae15-cdb757b978e8/harbor_breeze_ceiling_fan_light_kit_removal.pdf
    • https://a32e93c2-1aa3-4149-af29-aa5d163ab988.filesusr.com/ugd/40336e_74eef30bd8fa44209d3ec6423c7a9f55.pdf?index=true
    • https://584abdf6-e408-48d3-a53c-4313a8f82471.filesusr.com/ugd/18ee90_350946c5a0d74960a5a7b79ac57cc05d.pdf?index=true
    • https://4bd9ed84-c80b-4837-bb2f-b1353ebfd8aa.filesusr.com/ugd/5a1791_74ea034163274df0ac4de9f3284416d1.pdf?index=true
    • https://uploads.strikinglycdn.com/files/d0f20ac6-aaf7-4666-92b5-c3c674aa345d/vuzepasawususaraz.pdf
    • http://gupizamowakop.myartsonline.com/jira_bug_tracking_tool.pdf
    • http://jukasuxoseki.atwebpages.com/bmw_x1_preisliste_2020.pdf
    • https://74fc1a11-d445-4ffb-bc6b-7a79e5a65a18.filesusr.com/ugd/097bd5_11da6098b6a94a16a891a1eb4c14f71d.pdf?index=true
    • https://uploads.strikinglycdn.com/files/2f475c1a-02f2-4830-9cd6-d4d7b4bc1a73/what_is_history_economic_thought.pdf
    • https://uploads.strikinglycdn.com/files/1cad3bb8-abb3-4930-a564-0745af20a4a3/nespresso_lattissima_one_manual_espaol.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eba3.bin
c0579e360991e53ce1d2e97024330eac8254e93d705a44780a31c7b5e7f1c630		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA3 4836 bytes
font_01_sfnt_off0000fc1b.bin
0d99920604c987ea8e2d59508795b63e1d9eddc46f728d2906f6fb3d29e52a2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC1B 1872 bytes
font_02_sfnt_off00010507.bin
40ce67b05b1fba5c6c4a0a06aa7cb98ec9855e04b40e27686aab29e510d917ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10507 11620 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.