Malicious PDF — malware analysis report

Static analysis result for SHA-256 29b4cf9b98b987fe…

MALICIOUS

PDF

89.1 KB Created: 2021-04-05 18:08:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 1bd798b851fda5079aabf838253eaa34 SHA-1: cb79d64d761246a5339a0fbeccba77bd60eb79f7 SHA-256: 29b4cf9b98b987fe8f8d79360e8423f8e166555178692499595e1a3f7bb65d18
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a significant number of external links, identified as a link farm, suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier further support its malicious nature. The embedded URLs are likely intended to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jacksth.ru/award?keyword=the+swan+cello+and+piano+sheet+music+pdf+free PDF link annotation
    • https://cdn.sqhk.co/toviranevu/cgjifgJ/wunedelaxitutituvibomaseg.pdfIn PDF document text
    • http://123dutch.com/bevajaredozoxabukapc26ox.pdfIn PDF document text
    • http://bufovapafiwew.22web.org/how_to_read_the_financials_of_a_company.pdfIn PDF document text
    • http://springtea.space/burezatiziduwumisir6w5b.pdfIn PDF document text
    • https://cdn.sqhk.co/zowolanazew/hiS3lgf/superbike_drag_race_tesla_f1_car_fighter_jet.pdfIn PDF document text
    • https://cdn.sqhk.co/gadukupuwe/caSjabu/63826541315.pdfIn PDF document text
    • https://cdn.sqhk.co/tupujokuz/UichbTC/dilapidation_report_cost_sydney.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kadekosaraf.epizy.com/67221510240.pdfIn PDF document text
    • https://ccd4a2e6-63e2-4dcb-a02e-1ae1253dabcc.filesusr.com/ugd/059ff1_32319642472e4c4180600b2106a03f77.pdf?index=trueIn PDF document text
    • https://c7e723d0-7712-45a3-a8dd-8d8935e7c5e2.filesusr.com/ugd/c4f451_af54c00fc9fc4698af00ff9dce4c5be3.pdf?index=trueIn PDF document text
    • https://a21f0d7d-5fe0-4a99-a381-3b18266e0880.filesusr.com/ugd/6c313a_f182f804b6974ac597f63eabb55277c7.pdf?index=trueIn PDF document text
    • https://2dcb0092-dd22-4cef-90c1-8c398f802bb7.filesusr.com/ugd/ff3115_0e5965bb9fad440bb7021f0dd65e67c4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a232ea6c-7d52-4c84-8a70-6bf3fdbce642/62284307915.pdfIn PDF document text
    • https://6f2fb29c-15f2-4b08-b525-3eb91a7f0a41.filesusr.com/ugd/c3548c_da81fd0ab9f5437f909f3b2ef15e197c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d847a430-3f53-4190-a623-f6bbd5d644dc/traducir_recoleccin_de_datos_a_ingles.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2645eb5-3f29-4996-9f0a-51397cd1f245/90154086143.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010837.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10837 5436 bytes
SHA-256: ea5bbb6efc8c74af54074e536c9b3cab11dbf62dd67535cdf3125db40683d0b8
font_01_sfnt_off00011a9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A9B 11736 bytes
SHA-256: 072e8f9428d99a5c7940d569cd8e2012290eae23c151eca7b155e242845aa127
font_02_sfnt_off00014215.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14215 16100 bytes
SHA-256: 84650fe671c70ac66f3af0994468c9b9feb42d01905b0f030d5781e095ef8e52

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