Malicious PDF — malware analysis report

Static analysis result for SHA-256 3045519bbb7dcb2a…

MALICIOUS

PDF

122.4 KB Created: 2020-12-17 14:18:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: a18437be6827b1f4f9de189fcdec12d5 SHA-1: 170c6c62048779c711c0e85fa747e7816a806f2b SHA-256: 3045519bbb7dcb2ae3ecb39758e25c1c6d13ad8f56d11ac3e57fd4d8503252f4
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a critical heuristic identifying it as a malicious redirector link farm. The primary URL leads to a known malicious redirector, and another points to a large collection of PDFs, suggesting a coordinated effort to manipulate search engine results or distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent.

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
  • 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://traffking.ru/strik?utm_term=isaac+newton+va+the+gioia In PDF document text
    • https://dopijixofovaje.weebly.com/uploads/1/3/4/6/134692352/ziwafofu-waxitanowajas-kazafitobamo-zujowebozavimat.pdfIn PDF document text
    • https://bunemevomuw.weebly.com/uploads/1/3/4/7/134733911/3186800.pdfIn PDF document text
    • https://xizuzesujebowu.weebly.com/uploads/1/3/4/6/134666185/4660001.pdfIn PDF document text
    • https://faturigazed.weebly.com/uploads/1/3/4/8/134859690/xeluwadenure.pdfIn PDF document text
    • https://pasezarovatif.weebly.com/uploads/1/3/4/8/134858127/313416.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc717bec39fde0238a7ff67/t/5fc8c2b38bd779356758dfb0/1606992563493/zosasapisa.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc174bfa5bc066edfa992ec/t/5fc530ce61e25426e1df9b44/1606758608982/wapukip.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcef362a633b27d3ae57931/t/5fd12d93e14a7f39edbc1a79/1607544213149/59568747496.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1b53fc6229360ecb2a747/t/5fc7b7fcefc65c5b7a4d4e30/1606924284742/91560283487.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5968840f1034a5cc8ba68/t/5fd73348034a586a4f5de9df/1607938890416/apa_6th_edition_title_page_template.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc30710bda9c57a97cc117d/t/5fd1b343fec2791e31053f80/1607578435512/dissidia_final_fantasy_opera_omnia_review.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1a7ea16f6d44b07c4161b/t/5fc5ad0f173fb5383b6759f3/1606790415921/the_elder_wand_explained.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_off0001a0bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A0BB 5020 bytes
SHA-256: 194806be3d7e8cb35d292cf464876d4618ce85b79ce3b3619a63b5bc7b9ab6b0
font_01_sfnt_off0001b1ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B1EC 12588 bytes
SHA-256: ca6ad17bab4a09c59435ae9958e0d71badd63eafc148ad534e6ed9b200c19c01

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