Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e48697449429791…

MALICIOUS

PDF

72.1 KB Created: 2020-11-12 21:35:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 68fc70c18520b3e18de0a87d04089240 SHA-1: 5a9a232aae1978435fd4be2c7f10aa59b5cb34f5 SHA-256: 5e48697449429791bf211a88c3e5bf2ca93b1bece5407cb436147aeaa248e9d8
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 0.9996

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://traffine.ru/aws?utm_term=guided+meditation+sleep+rain PDF link annotation
    • https://vuzevarezevarot.weebly.com/uploads/1/3/0/7/130740461/5315003.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368777/normal_5f88000b6174a.pdfIn PDF document text
    • https://gukepofefefika.weebly.com/uploads/1/3/1/4/131437977/nugitufaz-kimabonudirelu-peleti.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369657/normal_5f9b05382abaa.pdfIn PDF document text
    • https://sifizebutu.weebly.com/uploads/1/3/0/8/130814914/pipigitazebulebuz.pdfIn PDF document text
    • https://lirabofopexile.weebly.com/uploads/1/3/4/3/134356775/bopiwajikifakosegafu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388274/normal_5f9b9e1ea95fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417531/normal_5f9c65606caea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403814/normal_5fa22b68c970b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/a9857fe7-c752-4c4e-bae4-2fdfa74257fc/barra_de_navidad_things_to_do.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04ff48dc-152c-4d3e-9fa7-613adeb92d95/shayna_punim_meaning.pdfIn PDF document text
    • https://s3.amazonaws.com/pisedij/podixiwidibuginuguzinu.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/sultans_of_swing_piano_sheet_music.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b7c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7C3 7652 bytes
SHA-256: 0e9aa32db61b599a47e5c033ce6169173d7a31a83e93964b8c821e5f90cdd016
font_01_sfnt_off0000d1cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1CB 5020 bytes
SHA-256: 372ebf2edb056806240debe66508d1e330fbbc3dc533fa99ad9609f51e498f47
font_02_sfnt_off0000e2b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2B8 9552 bytes
SHA-256: 530c17815f53058625e18d267864f94ec8ef56bdaec318f20cdfd5756029b160
font_03_sfnt_off00010371.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10371 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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