Malicious PDF — malware analysis report

Static analysis result for SHA-256 48db19f3954acd19…

MALICIOUS

PDF

71.6 KB Created: 2021-03-19 00:06:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: f448e41b5e53c6f4ff15c35359603ffb SHA-1: e4f44e2eb2e9cac51508728c8cffd368af1f5e6f SHA-256: 48db19f3954acd19284466dd007724347a3d4afd8be272ef3f6c0990956a30f2
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and an ML classifier, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing lure. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious intent, potentially leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://bologen.ru/strik?utm_term=what+are+other+names+for+god+of+war PDF link annotation
    • http://kirudina.iblogger.org/amiga_date_cuenta_libro_descargar_gratis.pdfIn PDF document text
    • https://nesipemuwazona.weebly.com/uploads/1/3/4/8/134881126/jusozoxumeno.pdfIn PDF document text
    • https://fosezuwupilure.weebly.com/uploads/1/3/4/1/134132817/nevagitedowasake.pdfIn PDF document text
    • https://dutimuju.weebly.com/uploads/1/3/4/3/134334277/8186643.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467007/normal_5fec86e5df597.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487184/normal_604d165897500.pdfIn PDF document text
    • https://wozukaziximuru.weebly.com/uploads/1/3/4/5/134587045/lovem-nodetu-zugazi-domov.pdfIn PDF document text
    • https://gakefutafo.weebly.com/uploads/1/3/0/7/130739004/wezaboropelosapukab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459788/normal_6041af881da43.pdfIn PDF document text
    • https://pisubemiduburor.weebly.com/uploads/1/3/1/3/131380627/7993061.pdfIn PDF document text
    • https://xevibobi.weebly.com/uploads/1/3/4/6/134683071/7261680.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/3e0b01cb-9c57-40ba-9f52-06511f674c27/71864318459.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f15d8f3-c12d-429d-b1e4-195c175f5455/51597836469.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f68d67f8-b277-4190-bea2-f6c867903d21/how_old_is_the_cast_of_vampire_diaries_2020.pdfIn PDF document text
    • http://petifogowiga.epizy.com/punufatazilotumokagam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee86f78c-2070-4255-8a11-d922b2285869/27248021216.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e58c704-e3ae-428a-929d-0f41b6a037bd/46844738955.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df19e9c3-0375-440e-afc7-cc4c96a4190b/rademivokexubivuzosuzufaw.pdfIn PDF document text
    • http://waxedejav.epizy.com/kagubukipolilezafasojebez.pdfIn PDF document text
    • http://ribitotuv.epizy.com/46228603341.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdee55db-7e8a-4484-a80e-23247d3cdc80/cuisinart_chw-12c_12_cup_programmable_coffeemaker.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5cc7289d-4394-40d1-a923-fa92495a3964/tekixaxudafafudizojo.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_off0000daa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAA9 5392 bytes
SHA-256: b69d209c2b446a942b81a3a87feafa07a14027ff4a771309ca52354457006512
font_01_sfnt_off0000ecef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECEF 10884 bytes
SHA-256: 2d4afcfb56bfc7fb2c9f887a324471b4031910e7a7263b40cc7e4f029efa6111