Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce8e2995808530ef…

MALICIOUS

PDF

73.7 KB Created: 2021-06-06 13:39:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a66ff2702566dc246dc9bf93bc193037 SHA-1: 12b8d25ca00bff999514f747a4ead73095a7dc73 SHA-256: ce8e2995808530efd0b1ab8ba385bf68a03635e877e8fdc3a1210b3827739311
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 0.9999

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://oniceh.ru/pbw?utm_term=restaurants+near+me+that+deliver+now PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4487423/normal_5fde81c2b213e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382418/normal_60431bad7f449.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476122/normal_5fefb98e24fcf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496586/normal_5fe13e26ea4ed.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463272/normal_5fe4055d936de.pdfIn PDF document text
    • https://kipokemob.weebly.com/uploads/1/3/0/7/130738996/ruxewefubujodi_luxijisevepog_dutekanod_vanozolokosiv.pdfIn PDF document text
    • https://nokaroropufut.weebly.com/uploads/1/3/1/4/131453144/a109d57.pdfIn PDF document text
    • https://boxavukexuzar.weebly.com/uploads/1/3/0/7/130775797/wotuforixazakowol.pdfIn PDF document text
    • https://dawugagulinejud.weebly.com/uploads/1/3/4/3/134368664/b3b324f26942.pdfIn PDF document text
    • https://lifofokir.weebly.com/uploads/1/3/1/6/131607054/d3e6a68ee1ec8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4530990/normal_600db52067ff0.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/4f840dac-b18b-4294-bc1c-7cf99d6365dc/79063175863.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2de47014-405f-46da-90b5-2345778a8be5/46030479358.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64049601-af6a-470e-a9da-735acb164471/vibitovejemavibimevazuto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba2a8989-6a62-4e7d-8ff2-bdc52a45ca7a/how_to_take_apart_ingenuity_swing_to_wash.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bba9b4f8-c622-4f6e-99db-be53109eeced/45629306015.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2eab80b8-7e6e-4339-93a4-d86597f0a245/troy_bilt_pony_blades_wont_engage.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c31b6958-ff3e-459b-8c5c-c2d9faa7b910/what_is_restriction_9_on_drivers_license.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_off0000e0c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0C1 5224 bytes
SHA-256: e3c98e77b086f0d16050f8501ceac4d1b24b7820ce6fe163b0e436e998550fa1
font_01_sfnt_off0000f26d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF26D 11440 bytes
SHA-256: ee9019bd835e6d07132fcd7313673299b6877e8788fcecca5ddebf8dbeb20b66

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