Malicious PDF — malware analysis report

Static analysis result for SHA-256 68eda3497bfe6931…

MALICIOUS

PDF

81.0 KB Created: 2021-05-28 06:53:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: de521ba8739c182246cb3a8e86c0cb0f SHA-1: c8f5f69695d3bb938b23bdb474188a305938b857 SHA-256: 68eda3497bfe6931dd88d5fb106ee7ea29ec2241bdf4fba55db41f413102bafc
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 0.9998

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://jumiwimov.ru/strik?utm_term=la+melanc%25C3%25B3lica+muerte+del+chico+ostra+pdf+gratis PDF link annotation
    • https://vatanivirasuta.weebly.com/uploads/1/3/5/3/135387760/sivotitedo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375890/normal_600da52393e28.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489722/normal_5fd205e736aff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370284/normal_601155fb5a34a.pdfIn PDF document text
    • https://rizitutidu.weebly.com/uploads/1/3/1/8/131856545/zurodosifexigu_lisijebapak_fawavidax.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369164/normal_5ff000e8e5af4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470385/normal_5ffc01570c505.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393635/normal_601dc7a1ec7c3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469349/normal_5ffd6f5da08b5.pdfIn PDF document text
    • https://fuketuxe.weebly.com/uploads/1/3/4/4/134495293/9e63eef37.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470975/normal_5fe3c803d6944.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480743/normal_601f0cc7daf48.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489850/normal_5ff342a09a54c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369660/normal_602c43f1cf5b3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd4d31c1-53b7-4315-8a4c-b258fce30710/remington_700_adl_varmint_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf97bb42-f51b-4564-9b65-24b32c48da23/human_computer_interaction_degree.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23a1d2a4-f4b5-4e05-8b8d-4940e5ea52e8/how_much_weight_can_i_lose_with_intermittent_fasting_16_8.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5693a1be-ce4f-45cf-ab79-79009e0dd06d/good_wood_joints.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_off0000e338.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE338 5648 bytes
SHA-256: 91f48bc9a6681365581a871a53401ce211985c3eb75cfe696a0d18d36984c2fa
font_01_sfnt_off0000f604.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF604 12408 bytes
SHA-256: 9eebc7f9d4f7856a42f0d8ddbb72099452df02f1eed56dcf54492717d4bf0509
font_02_sfnt_off00011e99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E99 16140 bytes
SHA-256: 5bfda07072dd2e1b0df7f1680a75ba616774ec51e1a09c257f000ba239241e1c

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