Malicious PDF — malware analysis report

Static analysis result for SHA-256 422ca1e140806f98…

MALICIOUS

PDF

68.8 KB Created: 2021-05-17 19:47:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 00388fcb7efa39901922c1d500cc0e88 SHA-1: 07f35bd94e13aa7b6bd1c4e26c34de78f333e003 SHA-256: 422ca1e140806f98de0daf83306f4bee715a1ffe0101b921676fb0f0d0bc9602
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous external URIs, with one pointing to 'jottigo.ru', suggesting it functions as a link farm to distribute malicious content or conduct phishing. The presence of embedded URLs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic further support this attack pattern.

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 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://jottigo.ru/wb?keyword=borges%20y%20yo%20jorge%20luis%20borges PDF link annotation
    • http://joblanc.xyz/pobre_ana_chapter_6_answer_keygwsk5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416928/normal_606bfa7d3ecda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369760/normal_60110c774dc32.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475379/normal_606cb137e978c.pdfIn PDF document text
    • http://all-system7.work/terraria_better_character_creation_modkjo8g.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499999/normal_602f9728b9217.pdfIn PDF document text
    • http://maykistore.ru/xorejafzp2hj.pdfIn PDF document text
    • http://storeplus.pro/89458703970ctbqi.pdfIn PDF document text
    • http://gujafitixa.iblogger.org/88639811155.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418764/normal_603b43a2e8005.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1801fa0f-56e4-4894-8452-b8e06651d4be.filesusr.com/ugd/868401_1529acc35daa4a838d84f63b5bf863f4.pdf?index=trueIn PDF document text
    • http://dalotidel.epizy.com/balanced_photodetector.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8d1d986-7091-49fa-8553-4eb33827f09f/2634816177.pdfIn PDF document text
    • https://893c8be9-d140-4a04-8a3e-66bd54b472cd.filesusr.com/ugd/efd7ea_91259bc846a846de804385a4e9322186.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/28790918-4776-44db-baec-62a0820eb964/xajolis.pdfIn PDF document text
    • https://181f3bdf-810f-4c34-abb3-9f3362228cd6.filesusr.com/ugd/30415f_d182cc1e01c14b44a0f6676d8d4b2d03.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c8a9d59-60c7-446a-b70e-adaca692d888/cisco_ccna_voice_espaol.pdfIn PDF document text
    • https://ef9935f7-a918-44a1-999f-f1d50a45e4a7.filesusr.com/ugd/b463f2_acf2bd261aed451c805702d2c8b60a38.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef94cbac-98a9-48ae-942e-f6558697e614/wonij.pdfIn PDF document text
    • http://bakevojedu.epizy.com/aditya_hridaya_stotra_in_bengali.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccb9b928-a3c8-42aa-b66d-277dff4a1486/what_is_a_uk_double_treble_crochet_stitch.pdfIn PDF document text
    • https://ea64ff4c-51e6-4efc-8cc1-399682447901.filesusr.com/ugd/961f18_613f88bbd75045d7afb0dfae0ca3f346.pdf?index=trueIn 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_off0000d09d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD09D 5008 bytes
SHA-256: bc6f83c5a9745202f7290e4e4933ba985bda675c47cd73e919b09380d187a714
font_01_sfnt_off0000e1ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1CA 10932 bytes
SHA-256: 90a45ea38256b2e36d25b737a933c8fe6122c5046f5119bdb96d99dad324457b

Open this report in the interactive analyzer, or submit your own file for analysis.