Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfa31f3d2c910fde…

MALICIOUS

PDF

81.8 KB Created: 2021-03-26 12:40:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3092cfb3b8b3d69cd52e6d8a00cfcf83 SHA-1: 8f577f13cc200fde9e7541175af24ca0256907f1 SHA-256: bfa31f3d2c910fde0fbdfd5522dd206c454f3d161936b6d74412c91a5d0d1df7
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 0.9964

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://nipisod.ru/wix?keyword=payday+loans+direct+lenders+not+brokers PDF link annotation
    • http://jovepodixowofow.mygamesonline.org/case_hardening_steels.pdfIn PDF document text
    • http://suvekitubexeso.getenjoyment.net/lajenadenuzisiroke.pdfIn PDF document text
    • http://pozuvixa.getenjoyment.net/zolapuvefugotadepikuranu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://depegiwisa.epizy.com/fewutafodubegokax.pdfIn PDF document text
    • http://lovagijikem.epizy.com/hannibal_full_movie_mp4.pdfIn PDF document text
    • http://suboxasolu.rf.gd/brain_aneurysm_screening_guidelines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee75aca5-2a07-43f4-861a-5d679dc2457d/folezexasup.pdfIn PDF document text
    • http://bodegifu.atwebpages.com/quality_management_certification_for_nurses.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/190f90a0-e6cc-4457-b221-d8bac813088e/44050862071.pdfIn PDF document text
    • https://s3.amazonaws.com/bibejovixapis/7602252072.pdfIn PDF document text
    • https://s3.amazonaws.com/sizadagazagaj/sedebopemopodu.pdfIn PDF document text
    • https://s3.amazonaws.com/dujepav/shadrach_meshach_and_abednego_coloring_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/safenalavojuwu/android_emulator_for_pc_android_studio.pdfIn PDF document text
    • https://6cdf8c5e-36a0-4b6d-987f-32d3d50030cd.filesusr.com/ugd/3c2e2e_2e06fdb87aa94eb7b9eefe959540534f.pdf?index=trueIn PDF document text
    • https://992bddda-184d-467f-a815-0165b41a2208.filesusr.com/ugd/69695d_94ca06a665f34bedaa48b5f44a9ca2ba.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/topipovikapari/22987069368.pdfIn PDF document text
    • https://s3.amazonaws.com/varoximu/55670577619.pdfIn PDF document text
    • http://newixisuzale.epizy.com/xulamakivapobirepuwema.pdfIn PDF document text
    • https://ded05c8b-f0d8-42bc-a64b-daa0b63394ca.filesusr.com/ugd/99afdc_128e7e650c2a4bdb9bb0567a65cf5f09.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tulosa/zariluxiromi.pdfIn PDF document text
    • https://s3.amazonaws.com/musoxifuvitalo/92317588414.pdfIn PDF document text
    • https://010f2e21-25ca-4560-806d-08cbbb7c7db1.filesusr.com/ugd/74a852_5b2acb36b5a84f3ba583d0d126fae53d.pdf?index=trueIn PDF document text
    • https://f9fc249e-2e6a-4908-9eb0-88005465a50d.filesusr.com/ugd/2530ee_71ea2c01994e4fee9be8eb7786e30e92.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/25705b08-6fad-403b-ad2d-690e6750af55/how_to_fix_wifi_not_showing_up_on_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/kotodur/15993994190.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a6ecc17-3515-4789-b7db-969e654b7e2b/81544995031.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb70a253-76a5-4c59-975c-10b50582ce4b/43196848113.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_off00010376.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10376 5240 bytes
SHA-256: 7ee8070b386c80b6861cd02c4a0ac94fac1716b6c6cbd1f308a373065a11a402
font_01_sfnt_off0001155e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1155E 10628 bytes
SHA-256: 69966921bdd67fdea4800c5e59f020913d520676516630daa7a0b7dfe776ee55

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