Malicious PDF — malware analysis report

Static analysis result for SHA-256 47c2db4489172229…

MALICIOUS

PDF

73.7 KB Created: 2021-03-15 13:40:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 1f2f17623638d2a4967c5b10f26e5a50 SHA-1: 45938eaef586028f8a00f1b27daa7c2cc6a7cb77 SHA-256: 47c2db4489172229a226539a79a14bdb80b20cc1d9150f73c857754206306e69
126 Risk Score

Malware Insights

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

The sample is a PDF document that contains numerous embedded URLs, many of which point to disposable hosting or suspicious domains. The ML classifier and ClamAV detection strongly indicate maliciousness. The document body, though heavily obfuscated, suggests a lure related to an 'Amazon echo dot 3rd generation user guide', which is a common tactic for phishing or malware delivery. The presence of external URIs and a link farm heuristic further supports the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://nipisod.ru/wix?keyword=amazon+echo+dot+3rd+generation+user+guide+pdf PDF link annotation
    • https://mepokebifonamos.weebly.com/uploads/1/3/4/0/134096039/1854a5d02.pdfIn PDF document text
    • https://cdn.sqhk.co/disonixures/fibDid3/child_inflatable_alien_pick-_me-_up_costume.pdfIn PDF document text
    • http://zurujavurobe.scienceontheweb.net/did_grandma_get_run_over_by_a_reindeer.pdfIn PDF document text
    • https://cdn.sqhk.co/dikizumi/3Eigih8/funny_wedding_cake_topper_ideas.pdfIn PDF document text
    • http://zipafaxelati.sportsontheweb.net/echo_and_narcissus_painting_analysis.pdfIn PDF document text
    • http://nipizakevenuvis.scienceontheweb.net/59439909319.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387037/normal_5feccca29659a.pdfIn PDF document text
    • https://basixafonamolod.weebly.com/uploads/1/3/1/0/131069750/wenakadibenuxiz.pdfIn PDF document text
    • https://kerijifulonuf.weebly.com/uploads/1/3/5/3/135328136/e7847f655a81.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378410/normal_600d2a6240c58.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e6e723d-ef62-431a-8ef4-f596c461989b/1969_ford_mustang_mach_1_for_sale_south_africa.pdfIn PDF document text
    • https://s3.amazonaws.com/xapota/lewonelogunafeloge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12b61058-9031-4fbe-b6b2-d6756492bb7f/51517748551.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d40f5b66-d47c-4720-90ca-040d5b397578/who_wrote_the_dissenting_opinion_in_brown_v_board_of_education.pdfIn PDF document text
    • http://wazeniwemir.onlinewebshop.net/ff7_remake_length_vs_original.pdfIn PDF document text
    • https://s3.amazonaws.com/godoremitiwuja/sketchup_8_3d_warehouse_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b49e059b-7593-41ca-a97a-c26df9f5c97b/relative_clause_worksheet_with_answers.pdfIn PDF document text
    • http://nimanexobubibub.onlinewebshop.net/how_to_use_the_oster_bread_maker.pdfIn PDF document text
    • https://s3.amazonaws.com/xapijifas/18932481305.pdfIn PDF document text
    • https://s3.amazonaws.com/vexeliku/23728788109.pdfIn PDF document text
    • https://s3.amazonaws.com/numunenoji/wapking_new_movies_2019.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_off0000dfd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFD3 5740 bytes
SHA-256: 9922291aed0a8614c0e91eb6e60770f9a24796c887fc86b0ecb572a8a96557ac
font_01_sfnt_off0000f339.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF339 10616 bytes
SHA-256: 080c2c80d154648087b23ef4b9ec9557d08aa16977132ab323eda9a51e6099de

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