Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d3da781def33b01…

MALICIOUS

PDF

73.1 KB Created: 2021-01-14 11:34:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 30f58bf7b0e87b9a67d13919fc08be04 SHA-1: 721c754b08524392214a2c013fd377be4f19a65a SHA-256: 6d3da781def33b01a28f2c36af605f7ad6aadedb4bb92d95d202c36a198ad15e
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, likely intended for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to 'business card format software free'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafffe.ru/aws?utm_term=business+card+format+software+free
    • https://cdn.sqhk.co/xasomegupur/huWhh3m/keretodologonakagunawafi.pdf
    • https://static.s123-cdn-static.com/uploads/4417670/normal_5ffed3a52204d.pdf
    • https://cdn.sqhk.co/gafisasiwu/hdOKcQM/streets_of_rage_1_gameplay.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/ropidadegaxut/pasemovarozaxijem.pdf
    • https://s3.amazonaws.com/lupuvogotog/excel_vba_worksheetfunction_count_range.pdf
    • https://s3.amazonaws.com/kumasala/96697395757.pdf
    • https://s3.amazonaws.com/gotijejaj/display_base64_encoded_in_html.pdf
    • https://s3.amazonaws.com/pasawe/verb_simple_present_tense_worksheets.pdf
    • https://s3.amazonaws.com/befarekogol/61075020900.pdf
    • https://s3.amazonaws.com/pozokimepe/xatemake.pdf
    • https://s3.amazonaws.com/vuterijoze/wapipolukuvivunubixorimew.pdf
    • https://s3.amazonaws.com/xupovobejanam/xifumatejatige.pdf
    • https://s3.amazonaws.com/tezude/82709711918.pdf
    • https://s3.amazonaws.com/mijumomub/72118726870.pdf
    • https://s3.amazonaws.com/vasofirida/olx_app_from_google_play_store.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e106.bin
7a653de631920014b4e8d5ed3792c9d5f4a68bfe6ba412714a1227d1316c4992		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE106 5276 bytes
font_01_sfnt_off0000f2f6.bin
a17e6ef612565b1d2b290db250edf4d7a837b250879bd2cfaac5fbfb62049e66		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F6 10648 bytes

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