Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d8d76259c3c950d…

MALICIOUS

PDF

84.8 KB Created: 2020-11-18 06:08:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 06e3cfbf74b327bd131993f1c25f325f SHA-1: d13532657e3f090626afb99ceeb00834783c465e SHA-256: 2d8d76259c3c950dc4d4f7fc1e1ee4bd4e1fb7804d621b0b6ce4f612e9705ac6
214 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document body's content, though partially obfuscated, suggests a lure related to 'My kundali review', which is used to disguise the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffmen.ru/strik?utm_term=my+kundali+review In PDF document text
    • https://mabudorowux.weebly.com/uploads/1/3/4/4/134458492/23e6ce5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376101/normal_5fad34cce0d13.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/c3d69292-b3ef-4cfb-b998-127b11e024c5/onko_Rolex_submariner_hyv_kello.pdfIn PDF document text
    • https://s3.amazonaws.com/devuxuzejozam/68971821434.pdfIn PDF document text
    • https://s3.amazonaws.com/tuletivotarupu/pukojawinob.pdfIn PDF document text
    • https://s3.amazonaws.com/nijudow/konica_bizhub_c224e_driver.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/descargar_libro_apicultura.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43366429-e76b-41de-880b-cc4d87f1fb95/vajenisuras.pdfIn PDF document text
    • https://s3.amazonaws.com/gidibesuxi/wiraladosefaruleronubof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f26155de-aa21-4dba-9012-998056344792/lofude.pdfIn PDF document text
    • https://s3.amazonaws.com/pazerogasarinu/31750070735.pdfIn PDF document text
    • https://s3.amazonaws.com/jiguwuzobozobaz/bsc_botany_syllabus.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9AE 4964 bytes
SHA-256: 34e62c89094eac4c89545c8f93a7f63f5f63b3f96a4afbb17ba1db506bfe7020
font_01_sfnt_off0000fabe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFABE 2844 bytes
SHA-256: 204006be06d5cfaad7451cd94b5d8e1478df1e6a3f079822cbddc439ea288b1b
font_02_sfnt_off00010682.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10682 10912 bytes
SHA-256: 879e4ff6e338031fb97eb6a39d6d0039d0ad3f2bd9ed82c4be18db1bdf28225e
font_03_sfnt_off00012b24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B24 17800 bytes
SHA-256: f1c15c8f81390422d10b3eaa17cd13e2399287e2a9a389c20754fb7449f70ca7

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