Malicious PDF — malware analysis report

Static analysis result for SHA-256 9be46b4904ad21ea…

MALICIOUS

PDF

75.9 KB Created: 2021-03-05 21:14:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 46107fa898cfa10602b780a6af98c227 SHA-1: 058f9e4f291f7f661b3fc7c96f61dac48a476297 SHA-256: 9be46b4904ad21ea05f4205d52a22c01bca51537a22c22b7b26ee3478ec5492b
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 0.9991

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://gimoguvi.ru/strik?utm_term=if+he+hollers+let+him+go+audiobook PDF link annotation
    • http://quickstore.pro/sutufiraxkam.pdfIn PDF document text
    • http://prizinsta.online/summary_of_cajas_de_cartonztsir.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455898/normal_603d759731738.pdfIn PDF document text
    • http://flathead.us/discuss_the_history_of_science_education_in_nigeria_till_dateypem8.pdfIn PDF document text
    • http://doucheop.xyz/88424337440mb0hm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471948/normal_600e08c51f8e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418170/normal_603b997627c94.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388422/normal_602c12521ee2a.pdfIn PDF document text
    • http://velesvoyage.ru/causative_form_exercises_have_something_done0zz8r.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375694/normal_6005e412069da.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/zuponefi/64043569030.pdfIn PDF document text
    • https://4b0cdf75-2e42-4830-99f1-bbdbaec3f661.filesusr.com/ugd/891219_fa8bcf9925384754b1c1aca24a4e5cdd.pdf?index=trueIn PDF document text
    • https://8ed62699-7d02-4439-b935-4286882ef7d4.filesusr.com/ugd/229b11_54c9b773e7e74ec6a960f8a556a292b1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e42611dd-203f-426a-8b71-e8e12d34fb38/10531659293.pdfIn PDF document text
    • https://s3.amazonaws.com/neporezofov/11196596474.pdfIn PDF document text
    • https://s3.amazonaws.com/likadojivivofu/berelefegubutur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0878f7f-3cc6-4151-b4af-c29646f0a8e8/how_much_does_a_yamaha_r6_cost.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6c98939-7838-43a9-8cc7-750b37ee1613/gijiridasinekesegi.pdfIn PDF document text
    • https://s3.amazonaws.com/jikopot/56589875689.pdfIn PDF document text
    • https://s3.amazonaws.com/dazovosugev/manuale_stampante_hp_photosmart_c3180.pdfIn PDF document text
    • https://s3.amazonaws.com/wulagisi/81695449205.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a47f9bb-8391-4d26-8960-6b449df4debf/harry_potter_6_movie_wiki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d09bf229-90d8-419a-aaa1-556c74b3cb97/ridgeway_grandfather_clock_maintenance.pdfIn PDF document text
    • https://s3.amazonaws.com/xijuxosisomuna/milosevobi.pdfIn PDF document text
    • https://b3a1a1c9-4f8f-4fb8-b7cc-7339030cc889.filesusr.com/ugd/162fe6_06c661aa9a42455c95ed3b2e6c83694e.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_off0000e8fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8FA 5460 bytes
SHA-256: c15b1dfc406a01f9149ed63c33148b8a3d1d14b69f5cd2f6aa04a54893391d63
font_01_sfnt_off0000fb5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB5D 11668 bytes
SHA-256: dfe28b5269f13976cd78385e160a7eefe440703c4ecce831e6f656fc2e009619

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