Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e684a813004b500…

MALICIOUS

PDF

78.4 KB Created: 2021-05-18 19:11:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 342fad6bc3c6ccb79ae3fc3868798951 SHA-1: d6b0e50be874da4d8ce03ac44d9ed6af6755290e SHA-256: 5e684a813004b500d5ef1dfcd15672d89b7f41a55ba44be3c0502a31795412b3
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://mezovuduw.ru/strik?utm_term=counting+money+dollars+and+cents+worksheets PDF link annotation
    • https://jefiwoso.weebly.com/uploads/1/3/5/9/135996081/leded-dodasixobusiz-genopofoz-milipi.pdfIn PDF document text
    • https://mixozanuzobese.weebly.com/uploads/1/3/5/4/135400893/wodirilite.pdfIn PDF document text
    • https://vufufibujirefe.weebly.com/uploads/1/3/4/3/134355905/raveguxani.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413362/normal_60079833a3c40.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476427/normal_5fc63fe92df39.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408864/normal_5fe3e4aa0b274.pdfIn PDF document text
    • https://sesumevikenaful.weebly.com/uploads/1/3/5/3/135346106/xejoratesag.pdfIn PDF document text
    • http://noxopadorilu.iblogger.org/ccna_data_center_study_guide_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491686/normal_605cfe9006fd8.pdfIn PDF document text
    • https://gijedilegin.weebly.com/uploads/1/3/1/3/131380969/xusesawibezozom-ziwodironaxo-nowudewanepalat-jixalonaze.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kuzelewekupe.epizy.com/wikikemari.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06489ced-cd10-41c7-a216-a6f009b4e034/funumugizo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/990394f7-a258-4554-b202-9a83444ac938/90252191882.pdfIn PDF document text
    • http://ximawefab.epizy.com/13162026842.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55d21b82-4f3d-4651-9c7c-215d2445685b/canciones_cristianas_con_acordes_de_piano.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea4e5882-b113-446a-bbbb-72d2862e32e9/ps_vita_2020_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c962d709-271f-4ba2-88fe-5e18c93c351d/a_second_declaration_of_independence_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b37d5bb-badc-48fc-a4fc-0a76169c197b/jovifolefexodif.pdfIn PDF document text
    • http://zadaxuro.rf.gd/bi_ht_thiu_nhi_c_vng_bi_trong_b_nc.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_off0000f452.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF452 5516 bytes
SHA-256: b5d3d7e51d9552c4aab83ea03c6db71da0b937485c6f1242df8d086d672db3b9
font_01_sfnt_off000106f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106F9 10756 bytes
SHA-256: c5fad16824e2e2c007f00476a6055a4d5698e78cfafaf363fcd7ff59ceb4b73a

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