Malicious PDF — malware analysis report

Static analysis result for SHA-256 550a13dc9580fe6f…

MALICIOUS

PDF

76.1 KB Created: 2022-04-06 10:35:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-04-04
MD5: b558a7df49371a799821983e2abe9e06 SHA-1: 8243e656d3d1fbe9ca7c5d4b61c6db9fcda04ce4 SHA-256: 550a13dc9580fe6ff1e6c5811c77867fce60fe3a6ae55412a181a8dd695742cd
206 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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://zapodebas.weebly.com/uploads/1/3/1/4/131437158/wolaxirujibozor_noburikonufed_dulifit.pdf In PDF document text
    • https://tiger-security.net/webroot/upload/files/84312204708.pdfIn PDF document text
    • https://joxedobiwot.weebly.com/uploads/1/3/5/3/135350216/bifoj.pdfIn PDF document text
    • https://kusajigoma.weebly.com/uploads/1/3/6/0/136036420/6902759.pdfIn PDF document text
    • https://wavikifetin.weebly.com/uploads/1/3/4/9/134901048/3887548.pdfIn PDF document text
    • http://paneldeconso.com/userfiles/file/17125753399.pdfIn PDF document text
    • http://losaltos.com/wysiwygfiles/file/70483968792.pdfIn PDF document text
    • https://libonatelizipo.weebly.com/uploads/1/3/5/3/135326144/gogarulepes_wunizo_wawejimomidoka.pdfIn PDF document text
    • https://felebovado.weebly.com/uploads/1/3/4/8/134889144/3398621.pdfIn PDF document text
    • https://wunogalabapa.weebly.com/uploads/1/3/4/6/134603674/guvusexatuta.pdfIn PDF document text
    • https://vekatugid.weebly.com/uploads/1/3/4/5/134592715/1571623.pdfIn PDF document text
    • https://mclandpin.com/calisma2/files/uploads/52737134828.pdfIn PDF document text
    • http://amoy-art.com/Upload/file/40908261627.pdfIn PDF document text
    • https://receptabc.hu/images_banner/files/20549415490.pdfIn PDF document text
    • http://www.bombillasconled.com/archivos/files/51499144652.pdfIn PDF document text
    • https://sikiwakasizo.weebly.com/uploads/1/3/5/3/135318116/7209262.pdfIn PDF document text
    • http://clinicaveterinariabilancino.it/userfiles/files/94571234086.pdfIn PDF document text
    • https://cualuoihoanmy.com/uploads/userfiles/file/xilazokebuxekiwokawumufe.pdfIn PDF document text
    • https://cafij.co.za/YmrXLWy8?keyword=thermador%20gas%20range%20repair%20near%20mePDF link annotation
    • 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://dejavu.sourceforge.netIn extracted file (font_00_sfnt_off0000c5a4.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0000c5a4.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c5a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5A4 17188 bytes
SHA-256: ef0df38c4684f84006ca8f98da43fef77935799e9e566ac0a2eeb76c211ee506
font_01_sfnt_off0000f2ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2AB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010ac2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AC2 10656 bytes
SHA-256: 066a95caf740927090e99fa0e057d7ce81282a530458e653a7e0f304d4dfb0a0