Malicious PDF — malware analysis report

Static analysis result for SHA-256 50b4d370aea92fdd…

MALICIOUS

PDF

63.3 KB Created: 2020-12-21 22:48:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 07240d4ae7f2fbbce69b1545b9681bdb SHA-1: 6e5fef3eb113c922df9e4ac37527f26f9bec02ef SHA-256: 50b4d370aea92fddfadd6a7df7af130177b3fb12981966ba6cf2b5f448a567d3
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The embedded content, though obfuscated, appears to be related to search terms like 'Arunagirinathar movie hd', likely a lure to drive traffic to these malicious links.

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://trafffe.ru/aws?utm_term=arunagirinathar+movie++hd PDF link annotation
    • https://kadefetu.weebly.com/uploads/1/3/4/4/134471860/wajitame_jinuvusibizod_kupamanekodezi.pdfIn PDF document text
    • https://zuxibonidape.weebly.com/uploads/1/3/4/8/134889984/zaxizekup_waxigubetopu_fajaritako_zabevorun.pdfIn PDF document text
    • https://kufurana.weebly.com/uploads/1/3/1/4/131482954/e0772b952ae6b14.pdfIn PDF document text
    • https://zemabata.weebly.com/uploads/1/3/4/6/134677216/2306259.pdfIn PDF document text
    • https://tunuwadubozowe.weebly.com/uploads/1/3/4/3/134363043/e3ca13.pdfIn PDF document text
    • https://kegibaxita.weebly.com/uploads/1/3/4/6/134661687/7068863.pdfIn PDF document text
    • https://nudegono.weebly.com/uploads/1/3/4/6/134682657/vubawopamisiwi-feriv-pirovogovore.pdfIn PDF document text
    • https://vasabofilusav.weebly.com/uploads/1/3/4/5/134585229/35e0ff6214.pdfIn PDF document text
    • https://gugabezari.weebly.com/uploads/1/3/4/5/134577353/3e045c0465bcf21.pdfIn PDF document text
    • https://wamibujobaju.weebly.com/uploads/1/3/4/7/134716207/7034944.pdfIn PDF document text
    • https://togurekeve.weebly.com/uploads/1/3/4/0/134040335/9443833.pdfIn PDF document text
    • https://pegigisujojefuf.weebly.com/uploads/1/3/1/4/131413718/f4c03f192bd7f.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/5fa94470-2c5a-470b-a0f5-1d088ae31219/gadosukes.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_off0000bada.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBADA 5076 bytes
SHA-256: 83d30af2e50baad1c3d0b2e36163e485e1446765d4c9b369aa6f7220d55af497
font_01_sfnt_off0000cbf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBF5 10864 bytes
SHA-256: a9484c50fee3ac7327cda3db0e2613460cead1d69dae26c09a4c81098234023e

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