Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ad575450ab74959…

MALICIOUS

PDF

82.4 KB Created: 2021-06-10 17:00:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 931b15364d54c78fee807f5e04b3a526 SHA-1: 052ec73de1cf6a366a3ae7efb439bf283c4b2915 SHA-256: 3ad575450ab74959cf08c282f9002e8a310eb94841d12a7482b77b5968e17504
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the PDF structure itself is indicative of a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://pistant.ru/pbw?utm_term=download+alora+sealord+song PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4461525/normal_6068c944e42ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467571/normal_602b6992285af.pdfIn PDF document text
    • https://xuzomavarek.weebly.com/uploads/1/3/1/3/131383242/db3a4eddc4d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375894/normal_6049531bedc70.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480162/normal_6051aa5bef064.pdfIn PDF document text
    • https://bagirarivevi.weebly.com/uploads/1/3/1/3/131384609/vudevav_xejumudemuje.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459035/normal_60070b2e493b1.pdfIn PDF document text
    • https://zisogojevup.weebly.com/uploads/1/3/1/4/131453725/xudewubal.pdfIn PDF document text
    • https://rovividupezudu.weebly.com/uploads/1/3/4/3/134373795/744ee5a878ba69.pdfIn PDF document text
    • https://wivutukezed.weebly.com/uploads/1/3/1/4/131438473/robile-lifopel-voremud.pdfIn PDF document text
    • https://fojubilaziri.weebly.com/uploads/1/3/7/4/137498845/tegup.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471711/normal_60045b07bb471.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4448124/normal_60aff1feb5ffc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485329/normal_5fe6408d96315.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374984/normal_6001bd65b619b.pdfIn PDF document text
    • https://xexofudef.weebly.com/uploads/1/3/4/3/134339501/vugosinufok_sojaf.pdfIn PDF document text
    • https://mekasirizi.weebly.com/uploads/1/3/5/3/135325166/9309526.pdfIn PDF document text
    • https://kobijetiva.weebly.com/uploads/1/3/4/3/134322382/sogato-sebidiwasaje-jazidif-tejegesigegogo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB7C 5084 bytes
SHA-256: 913d4ff5a1f4e7e67867f32b5ef9bdd432e9e27696c521ca6083430b8e30d159
font_01_sfnt_off00010ce5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CE5 2196 bytes
SHA-256: be61b0542d57414698a387a524a35f385b622f32db0c0595f9d50384633f89ad
font_02_sfnt_off000116e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116E5 10792 bytes
SHA-256: 268f2059415683afdcfe58fe4a1e1717e62ebd3496cebe493f860d3f87624bd1

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