Malicious PDF — malware analysis report

Static analysis result for SHA-256 d78e124fc9c3b53d…

MALICIOUS

PDF

76.0 KB Created: 2021-04-26 12:40:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 81071a3eea93bd71e6b9383928b52ab0 SHA-1: a4faf3ab1a179ceb4640496c8999adbc3352ba4d SHA-256: d78e124fc9c3b53db200bad3e85c75971dd79de5dfc34e9817580d8aec3f9abd
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically identified as a lure related to a search query. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or credential harvesting. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://jacksth.ru/strik?utm_term=do+all+gas+water+heaters+have+a+pilot+light PDF link annotation
    • https://cdn.sqhk.co/zipaduteki/Dhijghc/declaration_dsi_2020_date_limite.pdfIn PDF document text
    • https://cdn.sqhk.co/supetudoti/ife3Io6/can_u_get_android_apps_on_iphone.pdfIn PDF document text
    • http://gexomafe.mypressonline.com/35995796572.pdfIn PDF document text
    • https://cdn.sqhk.co/dolitife/aii3I4z/26014470222.pdfIn PDF document text
    • http://tevojagi.iblogger.org/lanonafo.pdfIn PDF document text
    • https://cdn.sqhk.co/suwezuzifu/ogdIhfr/jabomonedugaki.pdfIn PDF document text
    • https://cdn.sqhk.co/bexefoboxevi/cfhecow/68365599596.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://52ed6390-a5c1-4502-9f93-599cf6d98ad1.filesusr.com/ugd/f7fbc8_f0201ba691cd4f95adc7a8418a798a38.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0924699-ed95-4645-93b2-239ad7ac0960/36803719143.pdfIn PDF document text
    • https://183cab0c-2e2b-44e6-b55a-0f82cb58e578.filesusr.com/ugd/133137_ebd995cb3ea148d98d370c9eeeb7d45f.pdf?index=trueIn PDF document text
    • http://nowaginog.epizy.com/android_pie_system_requirements.pdfIn PDF document text
    • https://f5071db7-799c-4807-8cfa-c66b012f33b1.filesusr.com/ugd/9a4546_ec496e1a21d64cf6a1454b61ad2f8762.pdf?index=trueIn PDF document text
    • http://bonipoja.epizy.com/blue_jacket_park_christmas.pdfIn PDF document text
    • https://d5e9a058-cbdc-4968-ba72-30cdbf1e36a3.filesusr.com/ugd/9cfd0a_07c15e92c8b8450980f7571d6772353b.pdf?index=trueIn PDF document text
    • https://ecfc1f44-6648-4072-bff5-6ee4adcfbe4f.filesusr.com/ugd/e5a943_8d3e3f7355074c12930f84dd2ecaa39b.pdf?index=trueIn PDF document text
    • https://ca39a19f-16f9-469f-ab0b-65ec0463b8d0.filesusr.com/ugd/cc9b97_d2d69c9653e84e9bbe08dd69ea3796ad.pdf?index=trueIn PDF document text
    • http://jaweratiz.atwebpages.com/jidopixudunaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14c565ba-d69c-4a26-bbc9-e8e02544911c/xfinity_code_s0a00.pdfIn PDF document text
    • http://desejole.myartsonline.com/bajaj_boxer_100_service_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d3941db-fec4-4fe1-996f-d005b235feb7/5687628871.pdfIn PDF document text
    • http://fabonejane.onlinewebshop.net/40453979287.pdfIn PDF document text
    • http://nepumunu.rf.gd/native_american_zodiac_deer_meaning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/727cb1dc-2fc5-4114-a7f1-50dbb9508fd2/50692126593.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_off0000eb1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB1D 5232 bytes
SHA-256: 74a588e745ea6954fd4f8ac5dfe1f98bbce3d790af75dcc37eea01a5bd21e5b3
font_01_sfnt_off0000fd03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD03 10944 bytes
SHA-256: f766255aca29db867193481483e3a80c7267db4eaead2bb15a7d7f1173861859

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