Malicious PDF — malware analysis report

Static analysis result for SHA-256 c34d835e9b3bfd14…

MALICIOUS

PDF

78.9 KB Created: 2021-05-04 00:18:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 4eb0cc78acf322dd1e48b7b96060276e SHA-1: ddfeaf53de14e536e1c5b22b9dde047aa047ef13 SHA-256: c34d835e9b3bfd147849476b65720975c6e030cb1ff708bc5d71a9eebbfb2970
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://midufefew.ru/strik?utm_term=boy+in+the+striped+pajamas+book+cover PDF link annotation
    • https://kepijiloxa.weebly.com/uploads/1/3/4/1/134108658/mavud-sezusu.pdfIn PDF document text
    • http://pakawuwujawo.getenjoyment.net/reasons_to_stay_alive_sample.pdfIn PDF document text
    • http://jeruwit.mygamesonline.org/types_of_cells_and_their_functions.pdfIn PDF document text
    • https://kodetinerimaguw.weebly.com/uploads/1/3/5/3/135347088/bavezaraz.pdfIn PDF document text
    • https://betufevu.weebly.com/uploads/1/3/4/0/134098732/divibe-pifexome-fibex-buxavezif.pdfIn PDF document text
    • https://pinobuni.weebly.com/uploads/1/3/0/9/130969003/1766b51bbed0.pdfIn PDF document text
    • https://pokumowudo.weebly.com/uploads/1/3/0/7/130740164/sowegiserak_divenelis_zevepazebanim_bepozosed.pdfIn PDF document text
    • http://zamuxodub.22web.org/jajifixuranipazubuzo.pdfIn PDF document text
    • http://merexazumebenag.medianewsonline.com/pathophysiology_of_disease_8th_edition.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/3365a1ac-36ad-4dae-a7b4-d9180448483f/aspiracion_de_secreciones_en_nios.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3442dbc5-4b75-4a8d-b2bb-89528b0e6e3c/woganevisojulijewetevume.pdfIn PDF document text
    • http://gumusimigogasuz.onlinewebshop.net/suwogupafunil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5e4efe7-442d-44e3-a1b6-4e98043fb249/99564285980.pdfIn PDF document text
    • http://podadanojiwa.epizy.com/syma_x5c-1_review.pdfIn PDF document text
    • https://c84ffda1-e72a-45fa-8ce8-a771970cf326.filesusr.com/ugd/9fd656_1f717b66d13a4b0986ae4b33fff4e116.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xakajoziwibi/ihs_global_methanol_report_2018.pdfIn PDF document text
    • http://fexewagesulel.epizy.com/65317291043.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d241d9be-4b23-4dcb-87c1-f8b2d273f29d/basic_kannada_words_in_english.pdfIn PDF document text
    • https://73a1781f-5c9f-4c76-8a11-a8e8c44f336a.filesusr.com/ugd/d9f7b5_340d7f23d45f45febf52ff544de6a8af.pdf?index=trueIn PDF document text
    • http://romevakamijoke.epizy.com/doxotisusejimimalavuji.pdfIn PDF document text
    • https://s3.amazonaws.com/gawabog/formula_para_convertir_de_mm_a_pulgadas.pdfIn PDF document text
    • https://s3.amazonaws.com/fowonaxul/31854728749.pdfIn PDF document text
    • https://ae0ecf71-49bb-4ac4-bba4-d0f2a20d1af9.filesusr.com/ugd/668a47_f79012c2762441b5a7f368e9cf616227.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3AE 5772 bytes
SHA-256: 8ab3db08e6cf05181e5daa0964e84f2fe367e28c14ea7c56fe5ae9bf97831274
font_01_sfnt_off00010730.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10730 11208 bytes
SHA-256: 8c08a7c40fcb64faf95620b7fa970a38ffa4a6f029159022d2815e27112021cd

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