Malicious PDF — malware analysis report

Static analysis result for SHA-256 227d21ed62494c8c…

MALICIOUS

PDF

73.3 KB Created: 2021-03-31 20:46:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 3ccf011426e7b226bd6571ce253369dd SHA-1: c03d5cf4c8173c29681f752b92a4590c9056ef70 SHA-256: 227d21ed62494c8c0da46c5a3095831d5fe818ae0280fdc496e04f6532e42916
126 Risk Score

Malware Insights

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

The PDF document contains numerous external links, with one prominent URL suggesting a lure related to 'formability of sheet metal ppt'. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a non-clustered link farm on disposable hosting, and the ML classifier and ClamAV detection strongly suggest malicious intent. The presence of embedded URLs and the overall structure point towards a phishing or malware distribution attempt.

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://resalured.ru/123?utm_term=formability+of+sheet+metal+ppt PDF link annotation
    • http://mibikazut.mypressonline.com/pdf_antropologia_cultural.pdfIn PDF document text
    • https://cdn.sqhk.co/tefulobesa/1hdWZii/morningsave_customer_reviews.pdfIn PDF document text
    • http://zebiripu.mygamesonline.org/murachs_c_2015_solutions.pdfIn PDF document text
    • http://wikotimu.scienceontheweb.net/book_scavenger.pdfIn PDF document text
    • http://subejewumo.scienceontheweb.net/68052391666.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412778/normal_5fe309fdbdc8c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379969/normal_601b26ecd0fff.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405946/normal_6006e1c9c6e0d.pdfIn PDF document text
    • http://vufiwopader.medianewsonline.com/92314476620.pdfIn PDF document text
    • http://lorezagosuvese.scienceontheweb.net/sandvik_turning_catalog.pdfIn PDF document text
    • http://gekenig.mywebcommunity.org/how_to_restart_netgear_nighthawk_router.pdfIn PDF document text
    • https://cdn.sqhk.co/boxoveru/jiwZoqG/wubakomuzonalo.pdfIn PDF document text
    • http://kusukeluwabe.mywebcommunity.org/44625096817.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468554/normal_601ef92082324.pdfIn PDF document text
    • http://kibesamifi.getenjoyment.net/applied_science_lab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://furunes.onlinewebshop.net/56376890260.pdfIn PDF document text
    • https://s3.amazonaws.com/dikobepibelun/how_to_talk_to_a_live_person_at_twc.pdfIn PDF document text
    • https://s3.amazonaws.com/doxifuba/71910611735.pdfIn PDF document text
    • https://s3.amazonaws.com/dazawojob/2019_toyota_camry_hybrid_xle_for_sale_near_me.pdfIn PDF document text
    • https://s3.amazonaws.com/xijalovelokolep/20864152800.pdfIn PDF document text
    • https://s3.amazonaws.com/zemunomipazikez/thematic_apperception_test_tat.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_off0000e1e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1E2 5340 bytes
SHA-256: 7eb367b86f74978facfb1ff48e9020809d672f27d822d80c5871ce9749a161ca
font_01_sfnt_off0000f3e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E1 10640 bytes
SHA-256: 8fad8c068e765494ffd318eb4bf602cfeb02a9bf8aa6a0b8481182b9e32a51f0

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