Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2b84e97d6374a7b…

MALICIOUS

PDF

72.2 KB Created: 2020-12-22 01:02:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: f42e19e9abd304194141647425e044b5 SHA-1: e50d6690ecf0f58956d7dbb26ed7f4602dec7553 SHA-256: b2b84e97d6374a7b6e29e8f0f12e84ea42c0ab23202cd0591bc4ea9ed6a3c851
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a lure related to a popular game soundtrack, directing users to a suspicious URL. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, suggesting a link farm or phishing operation. ClamAV detection and ML classification confirm the malicious nature of the file.

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://traffine.ru/aws?utm_term=assassins+creed+2+soundtrack++mega PDF link annotation
    • https://poperetaro.weebly.com/uploads/1/3/4/8/134893078/bb1221.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/b2c67b49-237a-489c-9971-e5f84f9368ae/18436006371.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f66be1d2-f095-4789-95b4-e5baa0321279/tus_zonas_erroneas_libro_completo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a06512bf-923f-45e2-b610-a6296bd5c4e3/15292327144.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7cfc1f9-95b9-4e74-a36d-21db4e6eda8f/47977302791.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0836b527-3caf-455f-8305-1eaf00e326e1/75818327078.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/107bb840-f74a-48dd-8e9c-e769dd1a9b18/directv_error_code_818.pdfIn PDF document text
    • https://s3.amazonaws.com/febopa/gsa_alliant_2_ordering_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/pobixedele/xuwanarul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be578872-1b4e-4a84-9326-affaca49e360/agile_mind_algebra_2_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b064bce-012c-445e-b99b-a8627b5d97a0/rear_window_1998_trailer.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_off0000c2b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2B9 5412 bytes
SHA-256: fdc5bcfb8cb55d7c5e3446f6e07953d0d9466a970e0120c64865fd608fd585b5
font_01_sfnt_off0000d50a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD50A 11808 bytes
SHA-256: 508132228a5414c3e86bd074ba58c47fcc7c97ab4a264b0dbf7b78586db48554
font_02_sfnt_off0000fd51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD51 16528 bytes
SHA-256: 3448b264b4fa7ce4b17c2d66ed359b05582f422f64b294a780e5bc4cdf22d95c

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