Malicious PDF — malware analysis report

Static analysis result for SHA-256 10692c5bcd6fd39d…

MALICIOUS

PDF

75.5 KB Created: 2021-03-16 06:37:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 6d8ded9e1a23a096fb160283fb1243d6 SHA-1: 555ec0a4d10e00d98709b6ce75bf7850110e9b2f SHA-256: 10692c5bcd6fd39d6bebc30ff15142f6e2999de3eac5796e0b638cba1aacfe82
194 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an invoice-themed lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://maypoin.ru/aws?utm_term=corey+p+smith+business+credit PDF link annotation
    • https://cdn.sqhk.co/vuzowadijavu/highscN/neon_rider_game_download.pdfIn PDF document text
    • https://wizudagusosok.weebly.com/uploads/1/3/5/3/135317744/rujuv.pdfIn PDF document text
    • https://cdn.sqhk.co/boduzapun/iioOOjf/violin_and_cello_duets_pop_sheet_music.pdfIn PDF document text
    • https://visofebofoxofub.weebly.com/uploads/1/3/0/8/130814652/6b9c59564e16.pdfIn PDF document text
    • https://xomijati.weebly.com/uploads/1/3/5/3/135329577/574477.pdfIn PDF document text
    • http://gafavow.22web.org/hiv_guidelines_2018_jamaica.pdfIn PDF document text
    • https://cdn.sqhk.co/tekuligote/wvhg2ig/69131377052.pdfIn PDF document text
    • http://sepoxudozixo.sportsontheweb.net/the_book_of_job_in_the_bible.pdfIn PDF document text
    • https://benuwefijazom.weebly.com/uploads/1/3/4/8/134897428/fasikozipepada.pdfIn PDF document text
    • http://ritixibetono.mygamesonline.org/sotizudabaxexuwugusefefi.pdfIn PDF document text
    • https://namoturobiro.weebly.com/uploads/1/3/0/7/130739164/4932845.pdfIn PDF document text
    • https://cdn.sqhk.co/runudori/cHVgh4b/11426252386.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d497f082-4895-42de-a72c-038d9367c8a3.filesusr.com/ugd/8e727b_038f539fa64f45d885f20f151bb8ed7a.pdf?index=trueIn PDF document text
    • https://a35aa970-3e4e-4c20-be1f-53d10001bce9.filesusr.com/ugd/af4e73_99b096c764b64e6b96925d13038b8f26.pdf?index=trueIn PDF document text
    • https://a3c35cc3-4a3f-4d41-ab51-8b3e4b114d30.filesusr.com/ugd/2b25b5_939ee0988bc949b0a0d04efc984fc995.pdf?index=trueIn PDF document text
    • http://wazeniwemir.onlinewebshop.net/technical_analysis_of_the_financial_markets_download.pdfIn PDF document text
    • https://c5ee87e3-0a33-4977-aa5c-57820a25ff6a.filesusr.com/ugd/455f95_ad942f3f6bd942c7931cbeeffb4d99c3.pdf?index=trueIn PDF document text
    • http://mewizokefa.rf.gd/ocado_group_plc_annual_report_2014.pdfIn PDF document text
    • http://retiziwo.myartsonline.com/cable_current_carrying_capacity.pdfIn PDF document text
    • https://459ec6dd-5b69-4322-a182-74abbfaa0e48.filesusr.com/ugd/221eaa_235bce1f4ecf40f59b03fffbe7b89802.pdf?index=trueIn PDF document text
    • https://b20aee1f-b1b7-4e4e-be5e-d884e4ece670.filesusr.com/ugd/10e3af_54f8ac27889a4817a07694912e529326.pdf?index=trueIn PDF document text
    • https://9f349447-249b-4747-956a-316fe86e371b.filesusr.com/ugd/d2b720_6ec3d355bb844db39e1a925a0b47cb93.pdf?index=trueIn PDF document text
    • http://nazijomibak.epizy.com/beloved_script_basic_bold_font_free_download.pdfIn PDF document text
    • https://a121017b-3fb3-450c-9156-48dd71a9bf80.filesusr.com/ugd/07625c_db11abd1a9364e2dbec2b7afe37b1957.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9CC 5220 bytes
SHA-256: 252b9e025fd2fbf446d05538179abe6f4f880f250dfb2df5ff444bd4dbcb428b
font_01_sfnt_off0000fb5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB5F 10972 bytes
SHA-256: 524121389bd55099469a87e6317554834388ab5a9951f561f6cc42e79909811d