Malicious PDF — malware analysis report

Static analysis result for SHA-256 c806be30c02a67ca…

MALICIOUS

PDF

70.4 KB Created: 2021-02-09 00:17:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: de519db8900db4b4694d20b654ab41e1 SHA-1: 9f5d19220ff35536fff34105e461ab9da59d69b4 SHA-256: c806be30c02a67ca935e758d2966d5b836895ddcdf1fea208039d1b329ad7f33
96 Risk Score

Malware Insights

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

The file is a PDF document detected as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. The document body's obfuscated content and the presence of external URIs suggest an attempt to trick the user into visiting a malicious resource, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://crophysi.ru/aws?utm_term=web+store+chrome+app PDF link annotation
    • http://money-team.site/creo_parametric_4._0_tutorial_roger_toogoodegs29.pdfIn PDF document text
    • http://thecaffeinatedstudent.com/movie_songs_trivia_questionsdzjqm.pdfIn PDF document text
    • http://idealica-italiaofficial.site/hotels_near_chattanooga_tn_pet_friendlykqjyg.pdfIn PDF document text
    • http://edayafar.xyz/jijekakevubokiminewudx2ln.pdfIn PDF document text
    • http://gufutaca3.xyz/square_feet_to_square_meter_converter74pmc.pdfIn PDF document text
    • http://nnorm-id.com/voverigazoxarbhiz.pdfIn PDF document text
    • http://kurs1.xyz/56816074647xgs82.pdfIn PDF document text
    • http://milanomoda-italy.site/efe_koy_entel_koye_kars_2_full_izlesrdn3.pdfIn PDF document text
    • http://omshop.space/sefabelamakoperet5bev.pdfIn PDF document text
    • http://euromarket.pro/tanewirar04t1.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/rewepalazamiso/31495182500.pdfIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/72414256322.pdfIn PDF document text
    • https://s3.amazonaws.com/kelukakeb/expanded_polystyrene_foam_sheets_home_depot.pdfIn PDF document text
    • https://s3.amazonaws.com/suximawo/mcgraw_hill_education_answers_economics.pdfIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/72880375676.pdfIn PDF document text
    • https://s3.amazonaws.com/piradi/13818845148.pdfIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/bhikkhu_nanamoli.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_off0000d59f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD59F 5296 bytes
SHA-256: fc7a1d05d9abed9237c6f7a61c1fc4c62b637138054df73f1126b9ce635e80a3
font_01_sfnt_off0000e77f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE77F 10960 bytes
SHA-256: 0f02df8e71df8d7940543275eafa50d2e0b30c3d4af2583d62f6cfa593d76629

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