Malicious PDF — malware analysis report

Static analysis result for SHA-256 da164409ad8e561d…

MALICIOUS

PDF

80.6 KB Created: 2021-03-24 05:16:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 3862c0c629a68a04526bf42c8fd70c0c SHA-1: f48cea1e41ebccb869a90b6ac26eb6b07ddb43af SHA-256: da164409ad8e561dc8f90e2601776600cf4473c9f589acb6c5b7d4f9195c6b38
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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. 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 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/strik?utm_term=chuck+palahniuk+lullaby+movie PDF link annotation
    • https://bafuselowazela.weebly.com/uploads/1/3/5/3/135318440/8462770.pdfIn PDF document text
    • http://bokazisenu.22web.org/58676165107.pdfIn PDF document text
    • http://bubokap.iblogger.org/formal_letter_template_subject_line.pdfIn PDF document text
    • https://kosukanawator.weebly.com/uploads/1/3/5/3/135304621/kikobuxoz.pdfIn PDF document text
    • https://larulevi.weebly.com/uploads/1/3/6/0/136004384/98a7d144ac4d755.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/wurivuve/mail_merge_labels_excel_spreadsheet.pdfIn PDF document text
    • https://s3.amazonaws.com/kujesulad/edhelper_thanksgiving_crossword_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/makixibawumebol/the_bane_chronicles_book_order.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b6bcc32-3e16-44e8-a1cd-8af2f6b8bd6c/onn_bluetooth_earbuds_wont_charge.pdfIn PDF document text
    • http://talidarufuji.epizy.com/lspdfr_callouts_crash.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af60e07e-ac1f-4217-b5ad-20bccad69169/dovazovuwosov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47fe64a6-8e52-4a38-aad2-2ad4f405528e/how_to_know_what_size_sewing_machine_needle_to_use.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54b0961b-12ed-4c75-8d71-47c70f4f238b/xuvujaxumamatutemapom.pdfIn PDF document text
    • https://s3.amazonaws.com/xidulumexi/xegexeginixemub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dae9928f-2adf-4d69-9c33-a7518135a89f/49335381797.pdfIn PDF document text
    • http://tiwawaja.epizy.com/fluke_dtx_1800_usb_driver.pdfIn PDF document text
    • http://sabenimuzu.rf.gd/facebook_lite_for_java_mobile.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwuzerijofa/gafoduvigagigutegosefi.pdfIn PDF document text
    • https://s3.amazonaws.com/novifamigot/wusuziwar.pdfIn PDF document text
    • https://s3.amazonaws.com/jevopemosod/31504676744.pdfIn PDF document text
    • https://s3.amazonaws.com/gudukupir/garijo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29d075f2-f623-4f2e-b33a-4d7e042dbebc/75935498528.pdfIn PDF document text
    • https://s3.amazonaws.com/woneketelak/unspecified_adjunctive_procedure_by_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5dbb64c2-9610-438d-b361-cb760cd512b3/73478107112.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fdf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDF8 5168 bytes
SHA-256: 19c62ed2afe81533c5aacd73e77562a8c70e2b6ae67d3b4bf73369cc1582f17d
font_01_sfnt_off00010f78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F78 11016 bytes
SHA-256: f426102d5782cee4abb268d80ace086a9c3d38b84fe078c3e0d827a38e8c9789

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