Malicious PDF — malware analysis report

Static analysis result for SHA-256 da2c409f76e9e865…

MALICIOUS

PDF

76.9 KB Created: 2021-05-22 10:40:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 0dd6dfc99b2d91fe4b90935e9d29643c SHA-1: b9b670da591671fc6184798d981a121d8bc57e5a SHA-256: da2c409f76e9e865a77da3a6ca95f3346783541478db24f2a7d0ca05232c7283
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 redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and numerous external URIs are indicative of a malicious document, potentially leveraging embedded JavaScript for malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jumiwimov.ru/strik?utm_term=diferen%25C3%25A7a+entre+socialismo+utopico+e+cientifico+resumo PDF link annotation
    • https://xabizukilitexe.weebly.com/uploads/1/3/4/3/134335342/6830007.pdfIn PDF document text
    • https://zoparidozuxeb.weebly.com/uploads/1/3/5/3/135390671/7634434.pdfIn PDF document text
    • https://kobuwudorone.weebly.com/uploads/1/3/4/6/134666959/0f9c962d.pdfIn PDF document text
    • https://wopirizebopate.weebly.com/uploads/1/3/1/4/131452778/1796512.pdfIn PDF document text
    • https://gutinevar.weebly.com/uploads/1/3/4/6/134611255/c50c144.pdfIn PDF document text
    • https://latitatuforuza.weebly.com/uploads/1/3/1/3/131398212/lejuvasesojujok_detonenil_pamuzuwabelal_sefowevozasoje.pdfIn PDF document text
    • https://kakenemewaxe.weebly.com/uploads/1/3/4/6/134655752/88bf2d273.pdfIn PDF document text
    • https://lepoboniw.weebly.com/uploads/1/3/0/9/130969744/bf8757d12.pdfIn PDF document text
    • https://fenazimo.weebly.com/uploads/1/3/4/4/134437137/mikofurisuje-texewev-dosasu.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/6cbf9964-3950-42bb-adbc-1da731eb85b2/fluval_207_size.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d1deb8c-e660-4eba-adfd-6b8cf5cf1c32/57146565722.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1be1769c-3db0-43db-8bf5-ce3d84f627e9/19992121139.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1448758e-b471-4e10-ba4c-1eb2726235cb/14257637944.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3103e00d-d765-4f9c-aaf5-133a4692a780/rokariwidubeki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1dca0561-1cd0-4ed9-a77f-be6074596848/wokajo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c92e329-5d9c-471e-8d2e-174a46acc173/rode_videomic_micro_vs_go.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0b74b92-3130-4982-8b20-b1f9eb98ba63/natuvixugukuru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e63ffcd-a93c-4c4a-b385-d3d86b48cdd7/pemipoxubilivude.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54409d57-720a-401a-8a1f-1184db7ee43c/nobojevivilaresux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f50ab4b-b91e-4658-bc4a-c57e1d629a8c/one_mans_wilderness_video.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08053994-0374-4acd-8a16-ac6bffe22203/xakegirija.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_off0000eb02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB02 5340 bytes
SHA-256: e25e59bd1411ba4123ece7478ad7b57f20808b6e0dfff096d1ca798245732eda
font_01_sfnt_off0000fce2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCE2 12660 bytes
SHA-256: 1cd498f1dde49d5a9d2a52cbf48ac42c643b2e35fe52e82278b47a310dc4ffc0