Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce72a3477b9a4d8c…

MALICIOUS

PDF

93.9 KB Created: 2021-03-20 09:06:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: f5b416029715e73ad7c8039125db596e SHA-1: 20eff8a0e85e62040d15eb766fac509d4d2ea966 SHA-256: ce72a3477b9a4d8c360778e7cb3492c66991f316fde64ebead01237f6d9682f9
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a phishing or malicious intent. It contains a large number of embedded external links, a common technique for SEO spam or directing users to malicious sites. While no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 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://bologen.ru/strik?utm_term=2003+saturn+vue+v6+awd+problems PDF link annotation
    • http://kitafoged.medianewsonline.com/jedunamisudujufevu.pdfIn PDF document text
    • http://my-favshopf.online/reese_pilot_brake_controller_wiring2od8s.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393625/normal_600bfa9220255.pdfIn PDF document text
    • http://moneyindia.site/how_do_i_get_radio_code_for_my_hondahksyy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470982/normal_5fdc736023403.pdfIn PDF document text
    • http://wugafis.66ghz.com/bcg_matrix_word_template_free.pdfIn PDF document text
    • http://xolorodabo.22web.org/what_is_tropical_climate_in_australia.pdfIn PDF document text
    • http://botanilix.mygamesonline.org/75869982793.pdfIn PDF document text
    • http://storergoods.site/the_wisdom_of_florence_scovel_shinn_4_complete_books0ohqo.pdfIn PDF document text
    • http://urro-hu.com/sazuxokunode6735p.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455658/normal_600eb0c61af0c.pdfIn PDF document text
    • http://mezeferatitora.scienceontheweb.net/coffea_canephora_robusta.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://631ffb88-cf2d-4844-8d6b-9338a1b21cc5.filesusr.com/ugd/d24e6f_fbf386e15362424db8647f4e2c96233e.pdf?index=trueIn PDF document text
    • https://3d7304b5-8527-495f-b913-615d6f357a43.filesusr.com/ugd/ef7486_8324714a5c354775afb2306057c86436.pdf?index=trueIn PDF document text
    • https://4eb83289-b313-4542-b68c-79a1d4783db4.filesusr.com/ugd/f6336d_aee1105b446441dfaa15c53a2480449e.pdf?index=trueIn PDF document text
    • http://merujepapi.epizy.com/aptis_reading_practice_test.pdfIn PDF document text
    • https://5a8aee2d-3d68-4c09-98ed-743c9c56d6fd.filesusr.com/ugd/460efe_876d849598d54e96a95e9048fc485d6c.pdf?index=trueIn PDF document text
    • http://jirabasojexosud.atwebpages.com/65706994770.pdfIn PDF document text
    • https://0df22b04-17ae-4e65-9af8-3af4445b4601.filesusr.com/ugd/71fd01_be258975ed0d49d69eb3b1a8d4af9f21.pdf?index=trueIn PDF document text
    • https://a68e2ff5-bf17-48e3-82d4-ceb975b85758.filesusr.com/ugd/760101_34f2ffa4655543f4aaaa955ddc94759f.pdf?index=trueIn PDF document text
    • https://de461234-8179-4892-b46d-67dc01ae00af.filesusr.com/ugd/69bbc5_0aa02672234c4344b45f31de3c9ecfc0.pdf?index=trueIn PDF document text
    • https://6f465708-eb37-4ee2-8658-ebeec6cd93ea.filesusr.com/ugd/4bb103_6e21f723e89e47189684f2918f7b33b1.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_off00012d5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D5A 5892 bytes
SHA-256: 08bceafa289619c46c860973f1f5ef6ec3859875d9c5a1b2c05350d8f2867f7b
font_01_sfnt_off00014158.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14158 11652 bytes
SHA-256: 840696aa4c0a56eb0f1bae3aa722c16de697df9b6be520b503ba2c667980a5b6