Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0ac0f40c207d666…

MALICIOUS

PDF

77.3 KB Created: 2021-05-20 16:02:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 6f1403374be1e75c5d33d561b8d6ac66 SHA-1: 56b5790d3833104216b6cc2e80288a279ca79b56 SHA-256: d0ac0f40c207d666cc66fca5bc4c8b1958fd1b3ff19eaa2d12e4b0e4e9975c79
156 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 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 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.
  • 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://mezovuduw.ru/strik?utm_term=exploring+psychology+10th+edition+david+g.+myers+c.+nathan+dewall PDF link annotation
    • https://gegovowazuravas.weebly.com/uploads/1/3/1/3/131398401/difikugadobevoz-lesulatazen.pdfIn PDF document text
    • https://wuliwedifa.weebly.com/uploads/1/3/4/7/134753749/fd8ea38b9e8733.pdfIn PDF document text
    • https://tozilamuvopodes.weebly.com/uploads/1/3/5/9/135966944/jezekumife_nefexo.pdfIn PDF document text
    • https://xebololu.weebly.com/uploads/1/3/4/3/134340913/rokowixedevoro-kezifikuvanesa-kolipokanep-wiruxaregoreboj.pdfIn PDF document text
    • https://dakikizubebara.weebly.com/uploads/1/3/4/8/134889455/topazirumirula-popodexonokufo-figeg.pdfIn PDF document text
    • https://jotujovogubiraf.weebly.com/uploads/1/3/4/6/134627891/kotifokil.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/numunenoji/lafitimelogerijumaresega.pdfIn PDF document text
    • https://s3.amazonaws.com/subopukomanaw/how_to_sue_for_job_discrimination.pdfIn PDF document text
    • https://s3.amazonaws.com/gixirojozogufux/gusogarepapaxutisep.pdfIn PDF document text
    • https://s3.amazonaws.com/selivuvumepaveb/what_are_the_objectives_of_research_report.pdfIn PDF document text
    • https://s3.amazonaws.com/zodawanuror/1993_polaris_trail_boss_250_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a84958e-dcab-4bf0-a4e8-6513150deab2/votarekudov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/346e32b3-e664-40e5-b3d5-cb1d0355a3e7/mechanical_engineer_salary_virginia.pdfIn PDF document text
    • https://s3.amazonaws.com/jewizopukuni/dell_optiplex_780_data_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/dosalapasenow/the_6th_and_7th_books_of_moses_download.pdfIn PDF document text
    • https://s3.amazonaws.com/xoguwavosuje/functional_requirements_template_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/652a703f-11c4-46b2-8b16-54e7d7d43dfa/19220019931.pdfIn PDF document text
    • https://s3.amazonaws.com/xuxifuzituwu/77660911868.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bd85814-376a-485a-b861-ba073127d917/mevikakuwixomip.pdfIn PDF document text
    • https://s3.amazonaws.com/woxotopapozokev/pagana_and_pagana_mosbys_diagnostic.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ecf0c1b-3762-486e-9bef-4963f2b2ceb1/official_sat_subject_test_study_guide_in_math_level_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5174ee6-79a3-4c92-9f26-fc4892ce7c39/what_is_standard_operating_procedure_document.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_off0000ed43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED43 5992 bytes
SHA-256: 02bc8bce7ec8894bc7d28d7a4448f1d57d7616b478940f32c41dce7f1c31ed31
font_01_sfnt_off000101a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101A9 11008 bytes
SHA-256: 932fbb76d52d2574c3f3e84f52fc4b9f4645a52386547cbc72e75b4a483596ac

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