Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec4315d8f3210aef…

MALICIOUS

PDF

76.0 KB Created: 2021-05-15 15:24:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 9edf2b1c0385c5da37156fb0f9e6ecd3 SHA-1: 15396178f8792295519e241ed1ebf85e5d0edfab SHA-256: ec4315d8f3210aef9300425b2a3fa509fdd97c536ea454c2382763ce173decc5
126 Risk Score

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 0.9998

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://fokemale.ru/strik?utm_term=digital+marketing+jobs+ottawa PDF link annotation
    • http://newsportstechnology.ru/69013188688ed2vs.pdfIn PDF document text
    • https://cdn.sqhk.co/xasomegupur/eyx8hes/the_mummy_returns_wikia.pdfIn PDF document text
    • https://cdn.sqhk.co/xewafazuk/0HgdhR3/change_color_of_text_imovie_iphone.pdfIn PDF document text
    • http://nubolutlion.xyz/tarutasefutixyfii.pdfIn PDF document text
    • http://rastet-malysh.ru/zisunalghmd.pdfIn PDF document text
    • https://xojojesiz.weebly.com/uploads/1/3/4/2/134235357/siposagosuwitimuguwu.pdfIn PDF document text
    • https://moluxoket.weebly.com/uploads/1/3/2/6/132682852/naletuvageputegozaw.pdfIn PDF document text
    • http://cleaner-inn.club/giropewesopojumujk07o.pdfIn PDF document text
    • https://xijiruxexewige.weebly.com/uploads/1/3/4/7/134725886/6931722.pdfIn PDF document text
    • http://perevod24-card2card.site/84622158751a7n5o.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/donake/guxewaredorezozaregej.pdfIn PDF document text
    • https://5366dd3f-28a3-4342-b8e5-5bed86455aec.filesusr.com/ugd/a92322_c46873396e5a42c3b823bff81f3cc23a.pdf?index=trueIn PDF document text
    • https://d9e21584-559d-470c-b0e9-829a80f361fa.filesusr.com/ugd/989f82_8af1907fc1004ff38dc56ef26b52269a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mukutud/catalogo_natura_ciclo_15.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwamoxamo/funofurijixukelikuw.pdfIn PDF document text
    • https://s3.amazonaws.com/jivuxo/woluvezilofebefamaxeves.pdfIn PDF document text
    • https://s3.amazonaws.com/sutawowirosuvuv/47198642892.pdfIn PDF document text
    • https://ba789de2-c385-43ee-b32d-a34c698d1993.filesusr.com/ugd/b7082a_5aab994ca1634662abf6206a3585d2d9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zuwosil/elementary_spelling_inventory_scoring_spreadsheet.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_off0000ec50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC50 5376 bytes
SHA-256: 8d11300cccce80e5913742eaff82abd3d178d583c4d166e590d701a7b860b244
font_01_sfnt_off0000fe9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE9E 10716 bytes
SHA-256: 9b1105a3bf7deca0953abc3bfe346f0eaa2dc436080bd04a9cf52e9d43f9f742

Open this report in the interactive analyzer, or submit your own file for analysis.