Malicious PDF — malware analysis report

Static analysis result for SHA-256 3aaba15f55ce6501…

MALICIOUS

PDF

131.2 KB Created: 2020-12-25 06:52:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 2819032d66598298fdd89125075e3815 SHA-1: 6f64c51eb7709d431d19307253c58c559e08a96e SHA-256: 3aaba15f55ce6501942f10457d473a022037f9063b64f3e609821c0fde41125a
186 Risk Score

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 0.9997

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://traffking.ru/strik?utm_term=musica+italiana+famosa PDF link annotation
    • https://pudijeda.weebly.com/uploads/1/3/4/5/134586696/kowoferimi.pdfIn PDF document text
    • https://pilidikuvitas.weebly.com/uploads/1/3/4/7/134766888/8647715.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/8709547.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/divili_dapixi.pdfIn PDF document text
    • https://nubazodakop.weebly.com/uploads/1/3/4/8/134850303/topisilizevosal.pdfIn PDF document text
    • https://vonubaxuted.weebly.com/uploads/1/3/1/4/131452839/59bb2debc.pdfIn PDF document text
    • https://tajixuxax.weebly.com/uploads/1/3/4/7/134751877/luwifewefurif_jolubesanatabik.pdfIn PDF document text
    • https://cdn.sqhk.co/wubumeze/CBhidnk/wafol.pdfIn PDF document text
    • https://butavuzi.weebly.com/uploads/1/3/2/6/132682386/xadavugupo.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/vawoginele/11270708679.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7c713a9-3814-4d30-92d0-5b3c6d297b46/lesbian_porn_hun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e62597f-6f0a-4a3a-a1d1-a855da3e01da/budomeredukixudufovuzux.pdfIn PDF document text
    • https://s3.amazonaws.com/bulujono/qpsk_modulation_and_demodulation_lab_manual.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_off0001c778.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C778 4936 bytes
SHA-256: 147ca65007b22fa8256624d904c27992e3fbf73ae0fe97f48d565e6730652eb2
font_01_sfnt_off0001d845.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D845 11664 bytes
SHA-256: 95302dde2d0071940656e7614ecd9a8d3e24636f2b69c2359198b7d9f0fc1a4d