Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecb968577037636d…

MALICIOUS

PDF

64.4 KB Created: 2020-11-16 20:07:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: b9e6650a0d93b4391b23ebc30fa291e3 SHA-1: d3a593b7c6154932aeb1ea1baa2586c259d0f0d7 SHA-256: ecb968577037636dee69e8c19bd41492b0ac189b126ab122489d6f07966d5253
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://trafficel.ru/strik?utm_term=metex+m-3610+manual PDF link annotation
    • https://porelananov.weebly.com/uploads/1/3/0/7/130775759/sarulivife.pdfIn PDF document text
    • https://talapilodegopez.weebly.com/uploads/1/3/0/9/130969507/ca1683013.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367665/normal_5f882d07baa54.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475992/normal_5faaa62e5b1ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473432/normal_5faec56db2bf2.pdfIn PDF document text
    • https://mosejibufo.weebly.com/uploads/1/3/4/4/134437632/gujibipubapezizoris.pdfIn PDF document text
    • https://sufimaxunexex.weebly.com/uploads/1/3/4/3/134345405/71d96fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445333/normal_5fb2a07aba0b5.pdfIn PDF document text
    • https://jumuwubugunitus.weebly.com/uploads/1/3/1/0/131070493/pilezobedoxegu.pdfIn PDF document text
    • https://sagoxanoku.weebly.com/uploads/1/3/4/3/134350044/74e3fcb7f7f2a16.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383912/normal_5f9282f193095.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/ca5cff29-25af-42a2-837b-d39a28b90d41/pudalasirarowuleriv.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/logo_quiz_game_answers_level_20.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ae96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE96 4900 bytes
SHA-256: 9252709b48f4763c6f1006a4767b4f4575914a38cf7d878c37fa7a8e5aa889bb
font_01_sfnt_off0000bf3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF3C 12260 bytes
SHA-256: 0003c4f283814f8f0df6342139c5add964bf4bbdab431ccf1357a8678c1cf68f
font_02_sfnt_off0000e761.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE761 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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