Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f34a2d1b55a88ec…

MALICIOUS

PDF

76.4 KB Created: 2021-04-18 05:19:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 6fa1e21763a4358080ff6c3217fa65f9 SHA-1: c396fde63d9795cc7a3a3e9a23b1965d997bfc81 SHA-256: 4f34a2d1b55a88ec35765a8ddd03135e7e07d3c43f1a156e6d03565e30f1caf8
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 0.9997

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 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://lozipotod.ru/strik?utm_term=can+you+take+apart+a+nordictrack+treadmill+to+move PDF link annotation
    • https://jajibesuwazigix.weebly.com/uploads/1/3/1/3/131383486/jalafogaboboxiguven.pdfIn PDF document text
    • https://mejotowud.weebly.com/uploads/1/3/0/9/130969644/6749573.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500665/normal_606c92e55baa9.pdfIn PDF document text
    • https://rajiketuwomap.weebly.com/uploads/1/3/5/9/135957261/fujebedemixow_vedizibivite_juxexutitu.pdfIn PDF document text
    • https://vokijovagugudis.weebly.com/uploads/1/3/0/7/130776016/7977978.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443598/normal_600849e8938e4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448328/normal_5ff167a1354ee.pdfIn PDF document text
    • https://buwofapakudo.weebly.com/uploads/1/3/5/3/135316190/1fe67.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/xowasosuf/how_to_install_chicco_keyfit_car_seat.pdfIn PDF document text
    • https://s3.amazonaws.com/dinisemowoge/jajeguletaxef.pdfIn PDF document text
    • https://s3.amazonaws.com/rujimidujek/zukowivixapubuduxabiz.pdfIn PDF document text
    • https://6afed14e-2b01-442b-8c2e-11a8a6f39965.filesusr.com/ugd/46a5ae_33319f1144a74e7d9bc38f816606b7f7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/jennett_s_park_ofsted_report.pdfIn PDF document text
    • https://s3.amazonaws.com/ponivotigegepub/13573520643.pdfIn PDF document text
    • https://f33d1b56-f518-462b-b61f-c1b5c1ba661c.filesusr.com/ugd/1c44ce_cfcbd58849f44773810f5e6e1aec28f4.pdf?index=trueIn PDF document text
    • https://2df275fc-a8dd-466e-be95-33fe0afe7bed.filesusr.com/ugd/9b6d1e_a57f93a7cf164c88b16b5621f5741296.pdf?index=trueIn PDF document text
    • https://36622f5a-5a1b-41a5-aa98-965156e47ac2.filesusr.com/ugd/804ff6_e77b90381fa74015a8f5f5542d1d95fa.pdf?index=trueIn PDF document text
    • https://5f8b0e40-2141-4341-98ab-6145db4b8156.filesusr.com/ugd/2072cd_12091eba1dfc4d4780a9dadecf07e567.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vinejivunitego/nj_dmv_motorcycle_road_test_locations.pdfIn PDF document text
    • https://s3.amazonaws.com/mefonevimimix/58458645037.pdfIn PDF document text
    • https://s3.amazonaws.com/vavebufevodutob/channel_8_thailand_tv_guide.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eccd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECCD 5172 bytes
SHA-256: 543ead1a700350b694b8db2e41c67ad8702b1f2e07bb373c67b19ed3dc6e314b
font_01_sfnt_off0000fe61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE61 10416 bytes
SHA-256: 0fb10c7661b18348309aa91d2e902ef249006e3b5f8acebf896acd063bbcc9fc

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