Malicious PDF — malware analysis report

Static analysis result for SHA-256 07d97f108cf1c70b…

MALICIOUS

PDF

82.2 KB Created: 2021-03-14 23:43:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: fdf74b42a26d58f4d0303be69e5f9070 SHA-1: 6ba2562751207841c6776b57b1296382f4fdbea6 SHA-256: 07d97f108cf1c70b93386a6e4a9c1aae2bbd78ab8d62db973907fca366340602
186 Risk Score

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 0.9997

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://leonvi.ru/wix?keyword=maplestory+ice+mage+guide PDF link annotation
    • http://reduslim-shopufficiale.site/bio_data_format_for_marriage_download98vb5.pdfIn PDF document text
    • http://mp4.design/84336874581r2waz.pdfIn PDF document text
    • http://all-casino.xyz/wimawizunuwizuza0guye.pdfIn PDF document text
    • http://erogan-encolumbia.site/94712893662imcqe.pdfIn PDF document text
    • http://rajelakitapeki.iblogger.org/nubevotunuxubiwomo.pdfIn PDF document text
    • http://ductsunlimitedins.com/suzuki_drz400_service_kit9uu5b.pdfIn PDF document text
    • http://dojurajopixu.iblogger.org/predator_4000_watt_generator_manual.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tositasi.epizy.com/rubegetogizo.pdfIn PDF document text
    • https://s3.amazonaws.com/gudukupir/essential_oils_guide_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76c3e022-f3ed-4221-89a5-338976281c72/how_to_find_the_next_row_in_pascals_triangle.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f6e67fe-d942-45e0-b6ba-bcaf4c918995/rijopopilop.pdfIn PDF document text
    • https://5b949be5-44ef-49af-96c7-0ebaa8fe632e.filesusr.com/ugd/3402b1_46d0adf0780b49448d11dc19f8ca2d2c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nemafu/tasaviniz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ed2255e-aabf-4973-8a94-114787cb4707/margaritaville_frozen_strawberry_margarita_recipe.pdfIn PDF document text
    • https://b962d5b8-8819-42e3-9ba3-d95e8366760e.filesusr.com/ugd/f51585_ca9e4b0f7cb149678f302e3a84dc3dd4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a741a921-2227-473b-b657-3c353d91dc3b/a_short_history_of_the_movies_9th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e249d4c7-88d0-4665-98a3-34b4127c8c8e/spektrum_dx7_factory_reset.pdfIn PDF document text
    • https://77da94c0-0f0a-445b-87af-e489a0b5ef66.filesusr.com/ugd/db1da1_5f9af5b05cc043a8aebbd81368c3d1ac.pdf?index=trueIn PDF document text
    • https://2a4c341d-9af7-4f89-b48a-1b926ad6ced7.filesusr.com/ugd/dd6616_cfe92e6dff774a37b0b0df2a16b78ffa.pdf?index=trueIn PDF document text
    • https://56db2a4d-09ce-4ff6-a558-abb1d6727cd4.filesusr.com/ugd/003b86_6fecfa3b923e445aa0999eb535b7f810.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tumasun/1483047914.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_off0001024a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1024A 5500 bytes
SHA-256: 8f512bd707882133db031c32b7760608c063973985996df4d97c158b6d9c6753
font_01_sfnt_off000114fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114FD 11352 bytes
SHA-256: f9aa36becfcf1eabc6c8af3cecf6eb321eb76c30954b7c42b489e490d2ab7946