Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ce98cf255156b69…

MALICIOUS

PDF

88.4 KB Created: 2021-01-23 10:02:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 71123a904a64cc2f19fd3afb1ecf08b0 SHA-1: 9ba0507fd3a557b6a62c3eec1855d5d18c853ff9 SHA-256: 4ce98cf255156b694563cca0a64d194dbf28e9ecfde9815f8674bccc2cb721b7
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many pointing to disposable domains or link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafftec.ru/123?utm_term=ffxiv+titan+guide PDF link annotation
    • https://gunobapeve.weebly.com/uploads/1/3/4/7/134706327/geborogikezabaje.pdfIn PDF document text
    • https://cdn.sqhk.co/fedelubu/VpcaIUt/one_of_my_bucket_list_meaning.pdfIn PDF document text
    • https://site-1195638.mozfiles.com/files/1195638/new_macbook_air_performance_review.pdfIn PDF document text
    • https://site-1243998.mozfiles.com/files/1243998/konutipetovolomelol.pdfIn PDF document text
    • https://site-1176512.mozfiles.com/files/1176512/hssc_lab_attendant_syllabus_2019.pdfIn PDF document text
    • https://site-1194102.mozfiles.com/files/1194102/postpartum_exercise_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/wejagamewo/ZkgFhgv/93261457698.pdfIn PDF document text
    • https://xisevulatunetu.weebly.com/uploads/1/3/4/5/134595014/1188878.pdfIn PDF document text
    • https://cdn.sqhk.co/bigulikexupa/mhehfih/vanod.pdfIn PDF document text
    • https://site-1182802.mozfiles.com/files/1182802/proform_elliptical_machine_6__0_et.pdfIn PDF document text
    • https://cdn.sqhk.co/suxupijisajo/ial01Ps/26069180231.pdfIn PDF document text
    • https://cdn.sqhk.co/nebemina/u1jcMaB/foxunoxoxigokizid.pdfIn PDF document text
    • https://site-1247543.mozfiles.com/files/1247543/data_analytics_platform_businesses.pdfIn PDF document text
    • https://site-1173209.mozfiles.com/files/1173209/85064615038.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wasalesex.epizy.com/6_articles_of_faith_in_islam.pdfIn PDF document text
    • http://powosegunivu.epizy.com/ecs_blue_green_deployment_terraform.pdfIn PDF document text
    • http://xefokezutuvij.epizy.com/pdf_to_dwg_converter_free_filehippo.pdfIn PDF document text
    • http://laxiruzeremifam.rf.gd/equations_with_fractions_and_distributive_property_worksheet.pdfIn PDF document text
    • http://zapidijerazavot.epizy.com/rockstar_arabesque_ringtone.pdfIn PDF document text
    • http://bunokupisosep.epizy.com/baking_sheet_cooking_term.pdfIn PDF document text
    • http://nupituf.epizy.com/gedoneronuveri.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_off00011d18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D18 4852 bytes
SHA-256: 0a9fb351ebee8b90d74fd0dc149ca8a12bf9dc44516c7f79bd8ea0879ecfdeb5
font_01_sfnt_off00012dc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DC4 11536 bytes
SHA-256: 3b891a4fc514404676eb3445625cc27eaa0aadfb635cba474cc5d471be01103a

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