Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f5b0909a786e8ab…

MALICIOUS

PDF

81.2 KB Created: 2021-03-06 22:14:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 7dfedf162423d7fea2f4736c1e07fefc SHA-1: 84d6d218ed826289f28b62d39de2bb76095e7ec1 SHA-256: 9f5b0909a786e8ab52b9b92acf2c313ed1e037c8cde7cf033c2e2fb4148aa24e
126 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. It contains numerous embedded URLs pointing to disposable domains, suggesting an attempt to redirect users to malicious or phishing sites. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate it's designed to exploit user curiosity or need for information to lead them to potentially harmful content.

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://golowaki.ru/wix?keyword=present+tense+spanish+conjugation+chart PDF link annotation
    • http://jaxifas.getenjoyment.net/how_to_reset_bose_universal_remote.pdfIn PDF document text
    • http://instapriz.online/fun_vocal_warm_ups_for_high_school_choirvy1sv.pdfIn PDF document text
    • http://fruitslope.online/rimazidolduon.pdfIn PDF document text
    • http://bawimip.sportsontheweb.net/hp_laserjet_p4015x_driver_windows_10.pdfIn PDF document text
    • http://igbusinessabouthelp.com/nixasebexorodafisixejg8h.pdfIn PDF document text
    • http://bagomebefekixob.getenjoyment.net/vurifaxa.pdfIn PDF document text
    • http://vobugefu.22web.org/barsaat_1995_songs_songspk.pdfIn PDF document text
    • http://ductsunlimitedins.com/conference_program_template_microsoft_wordqiw9n.pdfIn PDF document text
    • http://ketotreno.buzz/643708995630gaex.pdfIn PDF document text
    • http://debegezuvume.iblogger.org/fitila.pdfIn PDF document text
    • http://rent-nout.site/kampf_der_titanen_2010_netflixh9aer.pdfIn PDF document text
    • http://nalatakojuzali.iblogger.org/55251407591.pdfIn PDF document text
    • http://getallcreditscores.info/tupexoguwaxelimatokzsymt.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://naxesabefadufu.atwebpages.com/how_much_does_a_medical_assistant_get_paid_a_year.pdfIn PDF document text
    • http://zikukoji.epizy.com/parcc_grade_8_math_practice_test_answers.pdfIn PDF document text
    • https://4ac36a2f-1533-488b-b282-cf34cdace458.filesusr.com/ugd/bcfc12_3c8021e133784ff685223ad9c1bfe137.pdf?index=trueIn PDF document text
    • https://aefb6378-f3ca-470a-b9d2-22936542d087.filesusr.com/ugd/fe129c_e883b68e0d9e4905a4128318fb156b65.pdf?index=trueIn PDF document text
    • https://cd489911-dc6d-4439-b408-84622343fb93.filesusr.com/ugd/d8e941_3033d491ad604f66aca16f0c955084da.pdf?index=trueIn PDF document text
    • https://21319658-e817-4d6a-846f-872ccfe0f0c2.filesusr.com/ugd/982af2_41b38062408b46d1b94d6047f2271f5a.pdf?index=trueIn PDF document text
    • http://tawatibajat.rf.gd/makokesoposofipujemiz.pdfIn PDF document text
    • http://lusajafimaneru.myartsonline.com/jejoduxe.pdfIn PDF document text
    • https://203e7bc3-08d7-4ecc-a8df-f797e0d4a079.filesusr.com/ugd/d4579c_a3326ad65d634ef0a712f46ae7d44e05.pdf?index=trueIn PDF document text
    • https://cb2d4818-2134-4ea5-ae57-1bc45cfc4292.filesusr.com/ugd/7e787c_790088dc03644154b8c2c7fb72850a5e.pdf?index=trueIn PDF document text
    • https://3745348a-78a0-42d7-8ff4-af2b45bf5faf.filesusr.com/ugd/02631b_eab5e8e67fa4472d93af114f1afe44b5.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f300.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF300 5120 bytes
SHA-256: d3e827719e186593202be3a3b6f55aabc90e8ddcc9f7ef67b91ce91847782623
font_01_sfnt_off0001045d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1045D 10672 bytes
SHA-256: bbe3fb8cc9820e12be05bae78e23631bddde550ac4eaeb299032d61867947713
font_02_sfnt_off000128ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128EE 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2