Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c466a7f8662a587…

MALICIOUS

PDF

83.8 KB Created: 2021-04-19 04:05:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 6dffeccdca187c3f7ba0a5a102135b64 SHA-1: 54d1b7e516939190183f780d59f02e3c9ee61e06 SHA-256: 6c466a7f8662a58789e8f966a83d6aba7ac638ed65f0d248aa2404626a3440dd
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. The document body and embedded URLs suggest a lure for downloading content, likely malicious. The presence of external URIs and link farm heuristics points to a distribution mechanism designed to host and serve malicious files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://ponafet.ru/strik?utm_term=vedic+maths+tricks+pdf+free+download+in+telugu PDF link annotation
    • http://lenugaguv.medianewsonline.com/91125766143.pdfIn PDF document text
    • https://lexugorubu.weebly.com/uploads/1/3/0/7/130776619/9204821.pdfIn PDF document text
    • http://shortsomfj.space/20627240500x4ozt.pdfIn PDF document text
    • https://dukuvelawabuze.weebly.com/uploads/1/3/0/9/130969723/4e108e.pdfIn PDF document text
    • http://theplafond.xyz/2210136943ire60.pdfIn PDF document text
    • https://polopiwej.weebly.com/uploads/1/3/4/3/134353222/7347607.pdfIn PDF document text
    • https://fupuvoriru.weebly.com/uploads/1/3/4/4/134494751/takiw.pdfIn PDF document text
    • http://komumepusaxam.iblogger.org/banach_algebra.pdfIn PDF document text
    • https://riwozetamozu.weebly.com/uploads/1/3/4/3/134331456/ef9ff960727bf.pdfIn PDF document text
    • http://powajaxib.medianewsonline.com/66012280876.pdfIn PDF document text
    • http://ses-paypal.com/81542287993lm80c.pdfIn PDF document text
    • http://kikebumanexewuj.22web.org/spider_man_wallpaper_cave.pdfIn PDF document text
    • https://dixufewopirar.weebly.com/uploads/1/3/0/7/130775961/5854768.pdfIn PDF document text
    • http://promooffer.site/how_to_draw_cartoon_hair_step_by_step2hlng.pdfIn PDF document text
    • https://varipejat.weebly.com/uploads/1/3/0/7/130739080/9524674.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://penobugixova.atwebpages.com/branches_of_financial_accounting.pdfIn PDF document text
    • http://davepizu.rf.gd/nyu_occupational_health_services_one_park_avenue.pdfIn PDF document text
    • https://s3.amazonaws.com/mogedozara/crystal_report_for_visual_studio_2013_professional.pdfIn PDF document text
    • https://s3.amazonaws.com/nawuvud/51916688839.pdfIn PDF document text
    • https://s3.amazonaws.com/woneketelak/30103481149.pdfIn PDF document text
    • https://s3.amazonaws.com/mixanaz/55583444912.pdfIn PDF document text
    • http://pelebirepopo.onlinewebshop.net/lakixosaju.pdfIn PDF document text
    • https://s3.amazonaws.com/pilazi/how_to_erase_all_content_and_settings_on_iphone_4s_without_apple_id_password.pdfIn PDF document text
    • http://tijunejo.epizy.com/aha_guidelines_valvular_heart_disease_pregnancy.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_off000106be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106BE 5688 bytes
SHA-256: 5029c043d41479b63046a17145c7872f512b62a45df05db261bacd293f11dc91
font_01_sfnt_off00011a09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A09 11384 bytes
SHA-256: c7fdc2c32a87b18836a6640908642da5e886c87b3eea776ec7f252363fb5707b

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