Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9b6f96887ab6ca3…

MALICIOUS

PDF

78.5 KB Created: 2021-03-23 21:18:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: f155d2ba9e4c4583fd1e24eecace43c2 SHA-1: 3387af76ed4b33f87e661c1075391c656a486a85 SHA-256: e9b6f96887ab6ca3c5951fe7d413e3c1084c06cc462f6da96a795028c4413865
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9990

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://xezojetit.ru/award?keyword=electronics+and+communication+engineering+notes+pdf PDF link annotation
    • http://venira.su/184634141006rg94.pdfIn PDF document text
    • http://boothattendant.com/winerosufunobuvsl.pdfIn PDF document text
    • http://lg-copyrightforms.com/average_salary_for_public_relations_coordinator9apgr.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368770/normal_6039e533ea9ed.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384046/normal_600579e9996f2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490529/normal_5ff92ed095731.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368504/normal_6043e12ebe830.pdfIn PDF document text
    • http://prosale.company/baby_bjorn_travel_crib_recall5yuhq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409619/normal_6054c1321d48f.pdfIn PDF document text
    • http://togaxifobuf.mypressonline.com/ocarina_of_time_3ds_walkthrough_ign.pdfIn PDF document text
    • http://vorakumezaxof.mygamesonline.org/tratamiento_de_la_anemia_en_pediatria.pdfIn PDF document text
    • http://kurs1.xyz/77151838232f5uz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://laxuzoto.onlinewebshop.net/50076986260.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/339e5ab6-5655-46de-837c-398f0229dc8c/vasovubimozigefupu.pdfIn PDF document text
    • http://wifotomosif.epizy.com/business_dictionary_for_pc.pdfIn PDF document text
    • http://ganusigesu.rf.gd/tamilrockers_hd_movies_2018_tamil.pdfIn PDF document text
    • http://lupixopuvir.onlinewebshop.net/ways_to_describe_rain.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/884b8d4a-f136-47f1-817a-4c532c254c14/playboy_magazine_cover_template_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57366855-6339-479b-8d4b-a574e081bcf7/find_the_best_online_store.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46e8755a-933a-47e2-8401-d979cbd36632/zufurubirukisu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cee7b8e-5050-4aee-8e18-2cd6f386f591/99711192268.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b15ac349-d252-45a0-91fc-1b77fd4e1662/what_are_the_five_basketball_positions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3355676-64b3-4b37-be46-b5669ecce662/transition_words_to_state_evidence.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65bd3d4f-fbff-488e-842d-b592b75d5cea/8513175559.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8271623b-4bd5-4d0c-a930-cd4963f8209e/jovuruwas.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e669.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE669 5312 bytes
SHA-256: 9efc6f407177fe418abfcb8e999956d1a22d1803d510df14de24004980c7377e
font_01_sfnt_off0000f85d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF85D 11036 bytes
SHA-256: b1fd367c1d59f7043117fbb705ae9b77a98d6d772ba42c809a64edd318c2316c
font_02_sfnt_off00011e0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E0A 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3