Malicious PDF — malware analysis report

Static analysis result for SHA-256 84f2b79fe3e07f41…

MALICIOUS

PDF

82.3 KB Created: 2021-03-23 20:16:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 5965cf25c86ebbb4a23c3832f4596dcf SHA-1: 5306be395f6fe822994b09c1373e120b174053d6 SHA-256: 84f2b79fe3e07f412fd7414bb3f02316d278116802b7d478cebc78e701c364d2
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 0.9996

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/aws?utm_term=peg+perego+primo+viaggio+4-35+nido+manual PDF link annotation
    • https://xuzimelo.weebly.com/uploads/1/3/4/1/134132070/velav.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477369/normal_5fceef5e606f3.pdfIn PDF document text
    • https://liberiloro.weebly.com/uploads/1/3/4/5/134589576/moxugojebapun-dujobosiginup-sudarosedoti.pdfIn PDF document text
    • https://donagifiwududo.weebly.com/uploads/1/3/3/9/133985641/233d4.pdfIn PDF document text
    • https://wiselorasen.weebly.com/uploads/1/3/0/7/130739143/8405286.pdfIn PDF document text
    • http://vemonubamupol.iblogger.org/77834334292.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476273/normal_602c0d57ac9fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446401/normal_60462d25d2aed.pdfIn PDF document text
    • https://xukarujejoxa.weebly.com/uploads/1/3/4/5/134597636/butatuwi_vofadev_zenilewixol_mogage.pdfIn PDF document text
    • https://zawurufaxi.weebly.com/uploads/1/3/4/8/134861846/gatixitotum.pdfIn PDF document text
    • https://burigazipe.weebly.com/uploads/1/3/4/7/134764527/f21f79f70092.pdfIn PDF document text
    • https://kujegafibez.weebly.com/uploads/1/3/4/2/134265926/3162049.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rigetimidolofok.rf.gd/65037947235.pdfIn PDF document text
    • http://buzidasore.rf.gd/common_core_sheets_finding_equivalent_fractions_visual.pdfIn PDF document text
    • https://36c7e617-1221-4173-b726-d5bce2878801.filesusr.com/ugd/610d21_43e8a7b226704caca33fd427e77b2dd0.pdf?index=trueIn PDF document text
    • https://f3ea461b-95fd-44cf-949c-5afda193840f.filesusr.com/ugd/a48928_e831f2677fbe468c90957ae4d428dd04.pdf?index=trueIn PDF document text
    • http://suromepekiri.epizy.com/17258900967.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15ae8ed4-1497-43d7-97d5-8c16e6c09542/pafuwabi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58ed9162-2498-45c3-8f17-1d285e0759a6/80152703260.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7c3392c-3375-4949-bbf8-6f6a7a2e2263/78959791036.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04a557f0-f853-41d9-a26e-f90c4b5348ee/baby_girl_names_sinhala_2020_with_meaning.pdfIn PDF document text
    • http://rexuworov.epizy.com/madame_bovary_chapter_summary.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_off00010390.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10390 5572 bytes
SHA-256: edc24f37eb8b9a8e3ada245b74188f5255fb56a30916fe1db61d982bae5c11cb
font_01_sfnt_off00011697.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11697 10904 bytes
SHA-256: edfd81484ab1e56bed888f29c8992d1969ba10f8eb20565be1327d5557b652f6

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