Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef96aa8b062cadc2…

MALICIOUS

PDF

113.6 KB Created: 2021-03-08 04:43:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: d7de68c6e6c8cf07fa6efa0fe53dd067 SHA-1: 1ca069b0edc3b46b1cf9f5f123e8b466f7816b5b SHA-256: ef96aa8b062cadc25db1a971317c9fdae90fe51925920a36ed16aa106767b97b
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 presence of numerous external URIs, including one pointing to `maypoin.ru`, suggests it is designed to redirect users to potentially harmful content. The heuristic `PDF_SEO_DISPOSABLE_LINK_FARM` further supports this, indicating a link farm on disposable hosting, a common tactic for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/aws?utm_term=baptism+of+holy+spirit+and+fire+bible+verse PDF link annotation
    • http://tonivatibiri.22web.org/pajokozusulobelativogu.pdfIn PDF document text
    • http://tisapim.iblogger.org/calculus_by_howard_anton_8th_edition_solution_manual_free_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379053/normal_6019a4345a64f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392868/normal_601d96b5310f1.pdfIn PDF document text
    • https://cdn.sqhk.co/refowofiros/VoCihaN/53200176152.pdfIn PDF document text
    • http://vejefulolite.22web.org/zigizobenireg.pdfIn PDF document text
    • http://julapekawej.22web.org/44157765713.pdfIn PDF document text
    • https://cdn.sqhk.co/vaxarogajib/EjbyXhj/78452388875.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485930/normal_602e603eb50c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375196/normal_6018dd333b24f.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/3c9bf24d-c8d6-429f-9f25-b7c566af72bc/manual_sort_pivot_table_excel_2010.pdfIn PDF document text
    • http://sekusasumoda.rf.gd/20391049914.pdfIn PDF document text
    • http://lixaxezubor.rf.gd/basemepiwemov.pdfIn PDF document text
    • http://lujufidopugola.rf.gd/blob_javascript_ie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f0a714c-e231-4102-b5ce-430f4295b11a/educational_psychology_textbook_definition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51a36a61-a5b9-47c3-904f-eb3fb57f9b6f/que_es_una_composicin_literaria_ejemplo.pdfIn PDF document text
    • http://jizuwugi.rf.gd/focusrite_mosc0019_scarlett_solo_2nd_generation_usb_audio_interface_-_red.pdfIn PDF document text
    • http://wizajevul.epizy.com/california_dreaming_menu_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/310b0b94-9b4f-497b-b00e-ab68475b97a9/dell_inspiron_n5010_laptop_keyboard_replacement.pdfIn PDF document text
    • http://bapexuzajo.epizy.com/7372898409.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_off00017dab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17DAB 5632 bytes
SHA-256: 962513cc076336ccfe9eea3fb846a478803cc0475735ac6c3e12cbeec4a779be
font_01_sfnt_off000190ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x190AC 12092 bytes
SHA-256: 905a52aca1bf286a970858fa587835a222418740fe4244610ec197b8df1b0291

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