Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd54e314be6e48ae…

MALICIOUS

PDF

57.8 KB Created: 2020-11-24 02:40:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: f82f539f9c5e26b9a436327e3db91b72 SHA-1: 1f51b0f7c69e93c763bd9a4a0f10cf4857b7f25d SHA-256: fd54e314be6e48ae07bbb113a0d3d89e3a818d04acec1602bcd2b497dbd0a356
214 Risk Score

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 and routes users through malicious redirector infrastructure. 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/aws?utm_term=alter+ego+b1+cahier+d%2527+activit%25C3%25A9s+pdf In PDF document text
    • https://rewemekekebaz.weebly.com/uploads/1/3/1/4/131406535/4568181.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/sugaguxagu/55037899349.pdfIn PDF document text
    • https://s3.amazonaws.com/jolituzoji/61363210897.pdfIn PDF document text
    • https://s3.amazonaws.com/zamuriza/reticular_formation_definition.pdfIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/brighthouse_shield_annuity_performance.pdfIn PDF document text
    • https://s3.amazonaws.com/fofeguj/lenafedudulumulukirir.pdfIn PDF document text
    • https://s3.amazonaws.com/divelikubapiwaj/bacaan_sholat_latin.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/rise_of_the_reds.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/french_baroque_architecture.pdfIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/68303612674.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/que_es_la_psicologia_segun_autores.pdfIn PDF document text
    • https://s3.amazonaws.com/xifabilejilab/big_lots_umbrella_table.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_off0000a7cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA7CC 5832 bytes
SHA-256: 6aec31d7ff555f7306d29824d7190c21db2b2705e73032aeb656ea7347a267dc
font_01_sfnt_off0000bb76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB76 9024 bytes
SHA-256: f3ee258d59de2f7ca0bd9f96145c054c58783b7c2a2fa79ee2f455d9996ac230

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