Malicious PDF — malware analysis report

Static analysis result for SHA-256 df93f9896e91c106…

MALICIOUS

PDF

87.7 KB Created: 2021-03-09 14:27:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: e92270428672857f4ca2630c614a19c3 SHA-1: 11c6a5cf912a98c2c6a6bb4500fda85650943ce2 SHA-256: df93f9896e91c1065aefcfeab81e76811d085b8dbdf2414ecee6786a76369d06
186 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, many pointing to disposable domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or SEO manipulation scheme, likely leveraging embedded JavaScript for redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/wix?keyword=wizard+howl+and+sophie PDF link annotation
    • https://mufogijagojar.weebly.com/uploads/1/3/1/0/131070489/9242868.pdfIn PDF document text
    • http://bio-ita.fun/what_are_these_red_dry_spots_on_my_facezgwdy.pdfIn PDF document text
    • http://sberbank.link/kujamudururia5r8.pdfIn PDF document text
    • http://servicesforsupport.com/what_reading_level_are_the_goosebumps_booksej6oe.pdfIn PDF document text
    • http://procripton.com/rinnai_heater_specsnv30k.pdfIn PDF document text
    • https://mafaredoli.weebly.com/uploads/1/3/2/6/132695491/wupinexuba.pdfIn PDF document text
    • http://mylevel.store/xukakijagavilea1ne6.pdfIn PDF document text
    • https://womagojewe.weebly.com/uploads/1/3/5/9/135961056/xemujetewasa.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/4efc45c3-7d91-4c2f-9d01-e59ea11af311/spacemaker_xl1800_dimensions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df415a03-64ef-4466-8714-0c02975bd33e/oracle_12c_rac_installation_on_linux_using_vmware.pdfIn PDF document text
    • https://s3.amazonaws.com/jolituzoji/16679705147.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a41eef6-8906-4cc2-afee-06c013fbc0da/jepalamaluli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79968673-089b-404d-a96a-5c2c19b82638/22823069807.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e70c822-da70-4ec3-b316-0f19d555eac1/que_es_un_proyecto_de_investigacion_en_ciencias_sociales.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df22f28b-45fd-4187-8362-596f9b0c965b/linepupukizevika.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c92f61c0-e99f-4e3d-a03c-cd23b85d9a42/pizzeria_da_marco_delivery.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b03d0663-332b-46f5-8c35-d99aa17e7dcb/guralelafipipemu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58661e8a-3cc1-4a4a-97b8-a4d034d55bfb/how_to_program_a_sears_craftsman_garage_door_keypad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6203d4d-4aaa-4a71-821f-893eb91da321/15418231662.pdfIn PDF document text
    • https://s3.amazonaws.com/xujitezu/sundance_helicopter_crash_report.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_off00011d27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D27 5200 bytes
SHA-256: b3f2c208ca74108719c2d38c3e8b9e7f7ea93298230705fc2bbdd831f5af9c58
font_01_sfnt_off00012ef2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EF2 10044 bytes
SHA-256: 1ddf25e3f134378f64c88a5146cd7a0c9c8b5cc1bb6be7a1f26ee8cc967d86ea