Malicious PDF — malware analysis report

Static analysis result for SHA-256 f673d55107bf36a0…

MALICIOUS

PDF

68.2 KB Created: 2021-01-19 18:54:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 652c52223550b8fb175c195247334409 SHA-1: 4743cf97adf0d5753a150a0944cd6f1f77abd5de SHA-256: f673d55107bf36a0ed6857f08080b097112cc022534339d4f8bda96fad972992
96 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an external URI pointing to 'traffking.ru', likely a command and control server or phishing site. The document body is heavily obfuscated, but the presence of embedded URLs and the overall detection suggest it's designed to trick users into visiting malicious sites, potentially leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffking.ru/aws?utm_term=dementia+management+guidelines+australia PDF link annotation
    • https://cdn.sqhk.co/wunokebewoz/VZpABZV/wipanekatigopevabuxa.pdfIn PDF document text
    • https://cdn.sqhk.co/firumefetev/SxA3Die/descargar_tasty_planet_forever_para_pc_mediaf_re.pdfIn PDF document text
    • https://cdn.sqhk.co/dodamewope/jghjbia/48218099864.pdfIn PDF document text
    • https://cdn.sqhk.co/guwuweri/jepicqw/likoridifabupevejifajim.pdfIn PDF document text
    • https://cdn.sqhk.co/zezoxomop/iYjb8P6/gisodomukumer.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406793/normal_5fbfe66fef6b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412408/normal_5fab6630e66ef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425227/normal_5ffa61a8cd7e7.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/rubidokezive/sinusoidal_waveform_definition.pdfIn PDF document text
    • https://s3.amazonaws.com/muvojugejoxip/4944558407.pdfIn PDF document text
    • https://s3.amazonaws.com/tuletivotarupu/1357382136.pdfIn PDF document text
    • https://s3.amazonaws.com/jiguwuzobozobaz/38090702940.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabisura/73384843966.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_off0000d052.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD052 5144 bytes
SHA-256: 628f2f810752165d3dbb4889cc5e252152deab0dd137184c77d6c5fa4b753003
font_01_sfnt_off0000e1b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1B8 10176 bytes
SHA-256: 106cecc19871b61da8517fccf04416126f6e2ac50accc76359a40e2ec8167a88