Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdd7683845556189…

MALICIOUS

PDF

77.0 KB Created: 2021-03-23 05:46:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8699958d8f16f43bab5508d2d07ce98e SHA-1: d08c4fbb7b18b7ff5dd12f71fd043fa11720b343 SHA-256: bdd7683845556189847b0c4adc6293fae2ac165254d3171c928f85acb5175aad
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used for SEO link farms or to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it's designed to lead the user to a compromised or malicious domain for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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.
  • 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://vilenefex.ru/award?keyword=definition+of+learning+in+psychology+pdf
    • https://cdn.sqhk.co/letarezetap/iihhef5/96373328558.pdf
    • http://storeyou.store/dusokejabjutu.pdf
    • https://diwekivoveludu.weebly.com/uploads/1/3/5/3/135313391/c9e7f.pdf
    • https://cdn.sqhk.co/kinemefuwa/Ngfggsk/zazevemibe.pdf
    • http://sluzhba1.net/jelaskan_konsep_cash_flow_quadrant_dari_robert_t_kiyosakifj5pj.pdf
    • http://jobs-ingenieur.best/environmental_impact_assessment_templateuf510.pdf
    • https://cdn.sqhk.co/jogeguzotire/cNlB7Ph/22058181175.pdf
    • https://lozibojugor.weebly.com/uploads/1/3/1/0/131069840/xedinukani.pdf
    • https://busozovamifolak.weebly.com/uploads/1/3/4/2/134235369/7483129.pdf
    • https://cdn.sqhk.co/tirabipati/ggchbhc/89837805384.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zumomasugipeno/currency_slope_strength_indicator.pdf
    • https://d0bf7e8b-5449-41c0-93e9-161603c0719f.filesusr.com/ugd/197ed4_e417ba12fe934891837c00da2792cdf9.pdf?index=true
    • https://b6086c54-8ef4-40f3-ba18-bbbb993b339e.filesusr.com/ugd/36e927_bdf8924b914944dda5ca3ccbbf9bfc57.pdf?index=true
    • https://5fdaa9e0-ad6d-443b-8779-beb8e45026dc.filesusr.com/ugd/05301a_db895eecd0ab4a2ba0dd05b80b959141.pdf?index=true
    • https://fa3f2985-242d-4a4c-93c0-6adbfb259eaf.filesusr.com/ugd/8dbe7a_051f097a1ea54ac68dcd0154276a235c.pdf?index=true
    • https://s3.amazonaws.com/tipikaxe/sap_crystal_reports_viewer_2013.pdf
    • https://c480cc3d-c044-45b7-a7fa-747782367dcd.filesusr.com/ugd/a26f59_dc746f3e87254200b119d29bfeb13f5c.pdf?index=true
    • https://0dd4521b-3e41-4083-9bcc-807cce03ae78.filesusr.com/ugd/cfe2e9_50e4b42dbc0a4704911c4d8413335f73.pdf?index=true
    • https://625f08e2-3d8e-45b5-8e8c-b95d001c5c7c.filesusr.com/ugd/d94ae5_21679a46e2ae4f239e0493f4624d28be.pdf?index=true
    • https://s3.amazonaws.com/xugigabitulu/89392529938.pdf
    • https://s3.amazonaws.com/remuv/how_to_identify_ezgo_golf_cart_model.pdf
    • https://6f672a44-e16c-4921-a0f1-e3781c0647c5.filesusr.com/ugd/bda22a_8d7aa879298441ce9ee6c07220cc7cf9.pdf?index=true
    • https://b2fc43c4-60ab-4dc1-a1c8-84833fda4e2a.filesusr.com/ugd/37321e_1fcc89af51134b3ea08622ca9d7ea1df.pdf?index=true
    • 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_off0000ee7f.bin
8e44136bf5e9fa636250d05bbf41b480693ea4a51fa15c713fcb0ffde67ac597		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE7F 5516 bytes
font_01_sfnt_off00010151.bin
52c80a2a843684f9b76b94e189324fcfa54cb6827bb4c96843448ada9b05dad8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10151 10980 bytes

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