Malicious PDF — malware analysis report

Static analysis result for SHA-256 6065650a70c0cc01…

MALICIOUS

PDF

96.0 KB Created: 2021-04-04 16:45:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 870a875dd1f03200eea6f8cbdebc0700 SHA-1: b2d02bb41210b4b35fa3e1e6f258c89f5b32ec39 SHA-256: 6065650a70c0cc01461f1c38b3c0617699c0b888bbf9d77b7e156faccbd3bc2c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9987

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 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.
  • 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/wix?keyword=mla+citation+worksheet+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369629/normal_6052e77ce3137.pdfIn PDF document text
    • http://mosivenatekes.22web.org/jewufutona.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486206/normal_6060624bce06d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445331/normal_605a287840ba4.pdfIn PDF document text
    • http://xamakag.iblogger.org/xiwumidogelava.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/tutapaxi/13128938612.pdfIn PDF document text
    • https://s3.amazonaws.com/lupebesu/cbre_retail_report_2017.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcd98519-b3bb-4073-81d0-7422bfe3c2f1/56332872005.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d66b6109-5d93-4210-a3c5-d643a5fb2542/full_bhagavad_gita_in_gujarati.pdfIn PDF document text
    • http://natizat.epizy.com/acronis_true_image_2015_kuyhaa.pdfIn PDF document text
    • http://lexaxixamu.rf.gd/fedoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/092ed817-db60-4f74-a451-729d6d8e0334/tawoxokekugevufebowikupi.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/nazomijurebexul.pdfIn PDF document text
    • http://golokelu.rf.gd/detutaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3560d22b-2686-4a33-8eaf-2e7a65da132b/85612694076.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52267b62-0e45-4ad4-928a-030babe15407/what_is_the_difference_between_apple_airport_express_and_extreme.pdfIn PDF document text
    • https://s3.amazonaws.com/rekorewexidiwo/90256347183.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b400c64-8332-4fcd-acca-1d4be61426df/raxatorinosalefakevu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fceef44a-142f-4d78-af23-c636867e6a5c/98625046669.pdfIn PDF document text
    • https://s3.amazonaws.com/tugumeb/36581187341.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de97e2cf-0fe4-42cf-9b3b-4c9f9a6fa9a0/nursing_theories_for_family_nurse_practitioners.pdfIn PDF document text
    • https://s3.amazonaws.com/mivokozibu/course_2_chapter_1_ratios_and_proportional_reasoning_test.pdfIn PDF document text
    • https://s3.amazonaws.com/nosepevozux/char-_broil_performance_seriestm_340b_test.pdfIn PDF document text
    • https://s3.amazonaws.com/tedowafomaru/traducir_de_ingles_a_espaol_reverso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b618312-8078-4a1c-ad8a-798fb0b9af52/80862964460.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001211a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1211A 5048 bytes
SHA-256: 8b6b1d0019a087cebf97d0a1d85436cbe076791bf97bb99944bb7b1d21225cc5
font_01_sfnt_off0001325d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1325D 12052 bytes
SHA-256: 1505112690b54969cbd9913636d6150a0c791e3657e3785eed6cea346e388a72
font_02_sfnt_off00015a8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A8B 16276 bytes
SHA-256: 6f66f3acf8eda7f40e9ddf0d0527e6be871bee33fc628b613c2d5e1ffd3ea4f3