Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcc0c7e4db565f66…

MALICIOUS

PDF

72.7 KB Created: 2021-02-18 01:47:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 940438b39ea71ff7356a89477a9de65e SHA-1: e6d207c2c2270ce020da7d52487f704f0e73c813 SHA-256: dcc0c7e4db565f661154c1b8ae6c34e2385cc452cb912c5a03ef36c64c5223c7
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://crophysi.ru/strik?utm_term=winchester+model+12+trench+gun+parts PDF link annotation
    • http://ses-paypal.com/john_cena_phone_number9t88j.pdfIn PDF document text
    • https://sufudoni.weebly.com/uploads/1/3/4/8/134853368/212f08.pdfIn PDF document text
    • https://sijalafad.weebly.com/uploads/1/3/4/8/134887162/eed8f55.pdfIn PDF document text
    • http://jasovawuke.22web.org/padimuku.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367296/normal_5fce3fcaf1191.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378857/normal_5fcccc7f58edb.pdfIn PDF document text
    • http://icily.xyz/anchorfree_hotspot_shield_vpn_windows750tu.pdfIn PDF document text
    • https://fabuduviwanor.weebly.com/uploads/1/3/4/7/134739750/mexuso_noxebaneboramug.pdfIn PDF document text
    • https://bezebaterizijir.weebly.com/uploads/1/3/1/3/131384714/jisozu-rekadaxirase-genubotujokar.pdfIn PDF document text
    • http://whalesqpa.fun/ctet_question_paper_20203auhx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464730/normal_5fd7c11277d12.pdfIn PDF document text
    • https://rubexanow.weebly.com/uploads/1/3/5/3/135346757/9982047.pdfIn PDF document text
    • https://nusisudarebo.weebly.com/uploads/1/3/4/3/134349377/wugikodelam.pdfIn PDF document text
    • http://amst-watch-v2.club/23371235893pvhif.pdfIn PDF document text
    • http://bazis-rostov.com/dazijemawebitaliboludotaagg0j.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zagapaxa/tezeduzidejavumezorotoda.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwuxot/latitude_3500_data_sheet.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF8D 5684 bytes
SHA-256: eea8752c7e807a775f3867401f8465865513b11b9a8dc0d0288878500419069c
font_01_sfnt_off0000f2c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C6 10236 bytes
SHA-256: 8336c2825cb561ca4639d7cf983aabc14f46ee87b188e9b24d47a4b76b891ac6

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