Malicious PDF — malware analysis report

Static analysis result for SHA-256 e31bb7950877b783…

MALICIOUS

PDF

78.8 KB Created: 2021-03-25 04:31:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: a1787a4c5e8c95524d42bdca5f1cf9b8 SHA-1: e01a0756641e39f683f37818c4282d35660924da SHA-256: e31bb7950877b783f84e5179ce73293923ea6b6e870412e7df20cca1843698ec
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The PDF contains numerous embedded links, with one prominent URL being https://resalured.ru/wix?keyword=college+depot+fafsa, suggesting a phishing or malware distribution attempt. The presence of multiple external URIs and the link farm heuristic indicate a deliberate effort to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://resalured.ru/wix?keyword=college+depot+fafsa PDF link annotation
    • http://hyipinvest.site/koseruporug4t3l8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371553/normal_5fd64cdb8bd4d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386613/normal_5fcc07f62128f.pdfIn PDF document text
    • https://gupufema.weebly.com/uploads/1/3/4/4/134456882/2298289.pdfIn PDF document text
    • https://lezojefob.weebly.com/uploads/1/3/5/3/135319065/4518083.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454429/normal_603cccbfd7c48.pdfIn PDF document text
    • https://falototadapi.weebly.com/uploads/1/3/3/9/133989324/nabatofireluju_walin_tebijevugazil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412160/normal_605500db12f35.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481831/normal_6017fde282d1a.pdfIn PDF document text
    • https://soxupewo.weebly.com/uploads/1/3/4/3/134392520/0622229c78.pdfIn PDF document text
    • https://jazedase.weebly.com/uploads/1/3/3/9/133997310/50242.pdfIn PDF document text
    • https://soguleta.weebly.com/uploads/1/3/4/3/134305846/vozutakij_kekiz_borosagosimara.pdfIn PDF document text
    • http://kungfumalibu.com/5822936777350ji7.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/a93bb277-f048-4dd5-afeb-162a94b7dad4/52110842776.pdfIn PDF document text
    • https://s3.amazonaws.com/tisegovofu/free_sample_credit_report_dispute_letter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6413e77-1d47-4e36-b079-ec825df6cf1b/nodosulixurodukifajov.pdfIn PDF document text
    • https://s3.amazonaws.com/kuxuxemu/54032570434.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5206afe8-bbda-4043-815a-c87d9d0937e7/4386197272.pdfIn PDF document text
    • https://s3.amazonaws.com/kotodur/kemutojanozivafefejovowe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86152d32-28f1-483d-acca-006d992cf52f/55824376579.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62d23aac-a5fa-4a89-b686-c1f1f4b2fc7e/sodastream_refill_cost_nz.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_off0000f81f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF81F 5020 bytes
SHA-256: b7df770d3557576cf900fd1694c91a0a6f6befcc986626570a81fc8489d4a6e2
font_01_sfnt_off0001094a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1094A 11000 bytes
SHA-256: 2a65ed9a353ce640075a030a002309c4421678d16805bfb1576aaca62ee24c3e

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