Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ec3efbf9b669113…

MALICIOUS

PDF

102.2 KB Created: 2021-05-03 10:41:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 50f8a1aa305d3701ac11798c3fd5ea05 SHA-1: def33e37136c07a9d403a5b7029cbfb92460573a SHA-256: 0ec3efbf9b6691137b4666145a5d9b4c9ead97b5bd14e626ea56c96cfb509403
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 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xajibur.ru/strik?utm_term=cambridge+a+levels+chemistry+past+papers PDF link annotation
    • http://kimokabif.medianewsonline.com/gekododeza.pdfIn PDF document text
    • http://luziniwanemek.sportsontheweb.net/15087241813.pdfIn PDF document text
    • http://mevolufasizi.22web.org/87178761177.pdfIn PDF document text
    • http://detobusukited.iblogger.org/adyaksha_kannada_movie_free.pdfIn PDF document text
    • http://vuwusud.iblogger.org/90264169340.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gadoxijumulop.epizy.com/monthly_income_expenditure_spreadsheet.pdfIn PDF document text
    • http://kotasivira.rf.gd/39528384374.pdfIn PDF document text
    • http://lodakakurozakod.epizy.com/gisebarusetewumo.pdfIn PDF document text
    • https://s3.amazonaws.com/zafirawit/tawijesaximedi.pdfIn PDF document text
    • https://5663e088-3595-439c-971a-5873693bee35.filesusr.com/ugd/e98895_3085436feab64b76925a41af89a127ee.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3fca38d-9a07-433b-bde4-d9f161a4e451/remibumiwebipiwetasowa.pdfIn PDF document text
    • https://d0275d90-c5b4-4c72-b581-d0e2b62fc6dd.filesusr.com/ugd/ee54da_e380425802c7487cadad490843341591.pdf?index=trueIn PDF document text
    • https://ed0f7819-48b4-4c0d-9119-93de03d81b9c.filesusr.com/ugd/e481ce_b29440534bbf4df2a4e628e5dc4769e7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bitizopovopaso/4369132531.pdfIn PDF document text
    • http://rovoviniv.rf.gd/pdf_to_dwg_converter_free_download_with_crack.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7982b20-3260-4434-8091-08492c5147d1/kaguzipaxowezirot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/439814b3-7543-425e-8b81-741ac7a64ce5/kagadiwimumalir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73ee7167-4ca2-42c7-9d3f-270556fb18d1/malayalam_movie_screenplay_books.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f764001-3d6f-4fb8-bb3d-fff55b1ccae2/programmable_logic_controller_plc_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/jedaxopopuko/84732565208.pdfIn PDF document text
    • https://c534e673-b245-4a6d-8787-855fe96db707.filesusr.com/ugd/e19215_f2c0d702dcb84a3a99b52a7571f61023.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dinigugaxej/husqvarna_weed_eater_223l_parts.pdfIn PDF document text
    • https://03df18d0-0a94-4077-8b44-1f3cf8b7c870.filesusr.com/ugd/23a6c3_3f475c9a410d4b7bb7488aea6e0c00bd.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_off00015066.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15066 5696 bytes
SHA-256: 40afab3af51e954ef3efb124391757412a5ac48f2ad9db5fc9b7919f2739eea1
font_01_sfnt_off0001639c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1639C 11560 bytes
SHA-256: 905ebec2f940d2307f125e244550be78d714d3b3a66a48a760f63de861de7e7b

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