Malicious PDF — malware analysis report

Static analysis result for SHA-256 3352d11c111d2bde…

MALICIOUS

PDF

83.5 KB Created: 2021-03-30 13:03:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 821d3b2e137263fa244ed89a0271b962 SHA-1: d2df48d6ed9002aa67108b7aa1ffa76ba21d5994 SHA-256: 3352d11c111d2bde4b3ddf03c78c2910dfc32573662da48415c9cf2cfa058f3a
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which are hosted on disposable domains and are designed to appear as legitimate search results. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the heuristic firings suggest the PDF is structured as a link farm to redirect users to malicious sites.

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://druttle.ru/award?keyword=ap+grama+sachivalayam+results+pdf+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4420587/normal_605ba745b0c31.pdfIn PDF document text
    • http://pixxel.life/how_to_ease_lower_back_pain_while_pregnantewaee.pdfIn PDF document text
    • http://ponupofo.iblogger.org/70277254266.pdfIn PDF document text
    • http://faceit.su/bolivopavetotametmrw.pdfIn PDF document text
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdfIn PDF document text
    • http://getallcreditscores.info/absolute_value_review_answer_key5wm68.pdfIn PDF document text
    • http://cmb-accueil.com/bupogimobavekenosudivoje16rpl.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454289/normal_5ff01dede4986.pdfIn PDF document text
    • http://zugomujufofolum.iblogger.org/vozotezefisena.pdfIn PDF document text
    • http://businessoutsourcing.org/nuzunomunapegax1e0ir.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481408/normal_601a7d4e55ddf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://c779a0a5-5a96-4308-8c37-720837e0bdd2.filesusr.com/ugd/4f1d02_186dcb5c388a4e80be1e4387d691dd87.pdf?index=trueIn PDF document text
    • http://sitotozip.rf.gd/arduino_pro_mini_328_p_datasheet.pdfIn PDF document text
    • http://dofumuligo.rf.gd/sawizu.pdfIn PDF document text
    • https://bbaef297-c986-4b42-acb3-0fd65605e280.filesusr.com/ugd/e9fc71_c4daafea0ef246f587a6c482aa2ccbcb.pdf?index=trueIn PDF document text
    • https://234d5d8d-19c9-4cab-a884-dd0775662658.filesusr.com/ugd/fb7225_a82c6e9e58614092807d475606f3c439.pdf?index=trueIn PDF document text
    • http://wivonuwexewixir.rf.gd/calendario_da_liga_portuguesa_2019_20.pdfIn PDF document text
    • https://a97be2a3-bfb5-42de-bba9-b145341b31aa.filesusr.com/ugd/1f2860_47df5dffdc234fbd83cae31ba0054c6d.pdf?index=trueIn PDF document text
    • http://firuwasuwubo.epizy.com/dafobolozolimazevanuzo.pdfIn PDF document text
    • https://d45380bd-a93d-4ef2-b2bd-4c7806d1f6db.filesusr.com/ugd/5d2cf3_9b522bdd6cc74110ae408c03e2277946.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDDE 5692 bytes
SHA-256: 681c87397d4e3a9278ae6dc0610f91baf629f3209685016de9790ecfb79b0ca7
font_01_sfnt_off00010131.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10131 15156 bytes
SHA-256: 6c2f47e92e8c484339e369643c0e9c3a238f1e6bfb2274d7a0e58703cc5cd0f5
font_02_sfnt_off0001327d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1327D 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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