Malicious PDF — malware analysis report

Static analysis result for SHA-256 3aa0de9500dfc516…

MALICIOUS

PDF

77.8 KB Created: 2021-02-27 22:54:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 63ecb0929cd3cded014caf81b675958d SHA-1: 2954e43fef09473ed7502497ffedb25226cf8c51 SHA-256: 3aa0de9500dfc51624c40ca26af4882b6e6964496e81e8e3d28499ae64f230e7
126 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 0.9998

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://midufefew.ru/aws?utm_term=bose+companion+2+series+iii+review PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4454172/normal_5fdd698fb22cf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467975/normal_6006ca56ba782.pdfIn PDF document text
    • https://cdn.sqhk.co/pebekaja/5jdhfie/rec_screen_recorder_ipad_air_2.pdfIn PDF document text
    • http://gukukoraxolu.iblogger.org/rejas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459935/normal_6033b583e861c.pdfIn PDF document text
    • http://gatigade.iblogger.org/parliamentary_and_presidential_form_of_government.pdfIn PDF document text
    • http://doloxuwukur.iblogger.org/55879063732.pdfIn PDF document text
    • http://mx50off.info/how_do_i_start_a_ketogenic_diet_for_freeqxvvo.pdfIn PDF document text
    • http://luxshop21.site/naxifazitesoleuqza.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469353/normal_601f0ec0963c0.pdfIn PDF document text
    • http://xaxifibipebux.iblogger.org/73347907080.pdfIn PDF document text
    • http://niverokime.iblogger.org/how_to_explain_the_rhythm_of_a_song.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
    • https://s3.amazonaws.com/pegozegi/denomaronipu.pdfIn PDF document text
    • http://gexibaw.rf.gd/gravity_falls_journal_1_portal_page.pdfIn PDF document text
    • https://s3.amazonaws.com/dupula/herramientas_de_busqueda_de_empleo.pdfIn PDF document text
    • https://s3.amazonaws.com/juliziwojatige/a_v_malformation_lung.pdfIn PDF document text
    • http://gokozir.rf.gd/pandora_reflexions_bracelet_size_guide.pdfIn PDF document text
    • http://mukokulag.epizy.com/xerolevikotefirup.pdfIn PDF document text
    • http://zikukoji.epizy.com/bhojpuri_video_ing_album_gana.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_off0000e3fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3FC 5088 bytes
SHA-256: b3e12ec0b470b91482a80d7e13668bd2b6f55f595c6bbd2164b463953b38791f
font_01_sfnt_off0000f52e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF52E 12524 bytes
SHA-256: 562ad814e7ccb28fe571fd9019688d786a27a4eb49b940a236bc88bc784ae138
font_02_sfnt_off00011c2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C2C 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2