Malicious PDF — malware analysis report

Static analysis result for SHA-256 50c824c4dbe10a39…

MALICIOUS

PDF

76.4 KB Created: 2021-05-23 08:41:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2dbea007f4971bddec1fcb50c77114c5 SHA-1: d5b499c0b6d4638c2732d7450092ec28a4439dac SHA-256: 50c824c4dbe10a394377e56c11c0dbdcdc3ae84f8c715e3096dcdcab1cfe9f2c
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or traffic generation scheme. One of the primary links points to 'resalured.ru', which is likely part of this malicious infrastructure. The ClamAV detection and ML classifier also strongly indicate malicious intent, consistent with phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://resalured.ru/strik?utm_term=what+are+the+four+main+factors+that+affect+climate
    • https://static.s123-cdn-static.com/uploads/4380859/normal_5fe59193531f8.pdf
    • https://kanodofeju.weebly.com/uploads/1/3/5/3/135325650/3595320.pdf
    • https://static.s123-cdn-static.com/uploads/4447087/normal_600999eb5140c.pdf
    • https://cdn-cms.f-static.net/uploads/4369498/normal_5fdc3726ee4d0.pdf
    • https://static.s123-cdn-static.com/uploads/4446917/normal_5fc68111064f0.pdf
    • https://wavenugila.weebly.com/uploads/1/3/4/8/134852162/9169095.pdf
    • https://cdn-cms.f-static.net/uploads/4382638/normal_604ca2623325e.pdf
    • https://cdn-cms.f-static.net/uploads/4376371/normal_6035ae902ebd4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/rubidokezive/mewifilimobuxaz.pdf
    • https://s3.amazonaws.com/kukazowox/ralopumujepetiravejar.pdf
    • https://s3.amazonaws.com/jivagajamav/zavunorixatupavap.pdf
    • https://s3.amazonaws.com/rudelazifizuvo/bissell_spotclean_proheat_pet_5207w_manual.pdf
    • https://s3.amazonaws.com/fizup/78550010121.pdf
    • https://s3.amazonaws.com/zumezeviwakiz/26260142701.pdf
    • https://s3.amazonaws.com/votawawo/48353909380.pdf
    • https://s3.amazonaws.com/bepukuba/10243053814.pdf
    • https://s3.amazonaws.com/zemigiduwagafu/why_is_my_lorex_system_beeping.pdf
    • https://s3.amazonaws.com/jivagajamav/dogolixobov.pdf
    • https://s3.amazonaws.com/mokuwanibof/56752653593.pdf
    • https://s3.amazonaws.com/wuvepilamamuse/how_to_make_charcoal_drawings_permanent.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f133.bin
5cea06ce5413b7fe070fbb280c0343ff98ca219c3486739cf573b1df91bdf8fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF133 5136 bytes
font_01_sfnt_off0001028b.bin
2bbbd5db42fbafa1269421f8a156154a25e4ee51facb8a4d019c976ca09fb62e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1028B 10008 bytes

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