Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ce9177ef8021dcd…

MALICIOUS

PDF

70.4 KB Created: 2020-12-02 20:09:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: ab18d6bbda0a16a379052408de251c30 SHA-1: 11651dc1b1d685a592369d0782e3d48ceabb03e6 SHA-256: 5ce9177ef8021dcd688b47147d14c22155ca924feef354badf3c851e96733c19
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 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://trafficel.ru/123?utm_term=google+drive+far+from+home+full+movie PDF link annotation
    • https://gefojepedawe.weebly.com/uploads/1/3/4/4/134478994/bolinosikud_timekogijawe_mifaje.pdfIn PDF document text
    • https://kalitawolilog.weebly.com/uploads/1/3/4/8/134860066/9533653.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419198/normal_5fa3eedb94de6.pdfIn PDF document text
    • https://nirawulef.weebly.com/uploads/1/3/4/3/134324477/sevuli.pdfIn PDF document text
    • https://lizatupapej.weebly.com/uploads/1/3/4/4/134401074/8b989.pdfIn PDF document text
    • https://tubenuluni.weebly.com/uploads/1/3/1/4/131437864/6772120.pdfIn PDF document text
    • https://jononosafopobof.weebly.com/uploads/1/3/4/6/134649788/gigini-damelibasezel-xidater.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://s3.amazonaws.com/nagev/dim_sh_as_worksheet_vba.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc12a77be9b6939510c7598/t/5fc55e904e98326c02c51d2a/1606770324087/great_america_halloween.pdfIn PDF document text
    • https://s3.amazonaws.com/fadedosi/jumasowilaredanijolijod.pdfIn PDF document text
    • https://s3.amazonaws.com/wunojipu/kotiladabi.pdfIn PDF document text
    • https://s3.amazonaws.com/kewakuko/49460200903.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/22084506609.pdfIn PDF document text
    • https://s3.amazonaws.com/dudurat/bialetti_mokona_espresso_machine_manual.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_off0000c9f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9F1 4932 bytes
SHA-256: f15f6f2d7d86991c8ffd1c10e159678c7cc2e6d3dd397a4c558803ab05960ed9
font_01_sfnt_off0000dac1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAC1 10428 bytes
SHA-256: 748077c098f5bc8a0320249ab2e0ae4d96cefac9d98d9e7f56ae2ef316581a40
font_02_sfnt_off0000fe8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE8A 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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