Malicious PDF — malware analysis report

Static analysis result for SHA-256 d441c65e97bf11ff…

MALICIOUS

PDF

68.0 KB Created: 2021-03-27 16:53:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 49e058ec04d34e3f9bd65fb7ddbf0249 SHA-1: 405916e714b652302dba901817d36733cd6d7369 SHA-256: d441c65e97bf11ffee037697473524ae077097e06a93e3037b5c5157ae938403
96 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or SEO spamming operation. The ML classifier also strongly indicated maliciousness. The embedded URLs point to various PDF files, likely intended to lead the user to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 4

  • 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.
  • 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/123?utm_term=araba+oyunu+3d+apk PDF link annotation
    • https://gupexududoteg.weebly.com/uploads/1/3/5/3/135302954/8792291.pdfIn PDF document text
    • http://lg-copyright.com/togudefixaxexv82jx.pdfIn PDF document text
    • http://pakawuwujawo.getenjoyment.net/introduction_to_auto_mechanics.pdfIn PDF document text
    • https://jivetigaforivuj.weebly.com/uploads/1/3/4/3/134350389/walopatat_xunasujo.pdfIn PDF document text
    • http://trenolgia.buzz/canon_mf_toolbox_softwarett5gj.pdfIn PDF document text
    • https://duzajitoji.weebly.com/uploads/1/3/2/6/132680922/ruwegox-nalora.pdfIn PDF document text
    • http://testersairf.xyz/wuvubikejevilokemupevxhw6.pdfIn PDF document text
    • http://zutolewe.mywebcommunity.org/what_should_you_look_for_when_buying_a_business.pdfIn PDF document text
    • http://birebap.scienceontheweb.net/11952466688.pdfIn PDF document text
    • http://tewosube.mypressonline.com/rnn_bptt.pdfIn PDF document text
    • http://mx50off.pro/guidelines_for_short_term_disability2ul5f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vedexajawo/wifasupat.pdfIn PDF document text
    • https://s3.amazonaws.com/sowirutelevolur/veneloz.pdfIn PDF document text
    • https://s3.amazonaws.com/vibasujefir/full_stack_react_application.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e60dec64-8e0c-4078-a7fa-931135ffb869/tracfone_lg_k31_rebel_smartphone_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/figidireki/what_exercises_can_help_scoliosis.pdfIn PDF document text
    • https://s3.amazonaws.com/lovomijelun/android_developer_jobs_in_mnc_chennai.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/113ccdb5-8847-45fc-8415-f3c385295cb2/lupizizim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5672264-38e0-47ea-a43e-cc7acb2dedae/60018474817.pdfIn PDF document text
    • https://s3.amazonaws.com/rodakarugupoko/jakufafavumiropujesuso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02f27b4f-c1f7-4ab7-8101-a27aff53169a/94611772731.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2ad74ff-8735-4b82-a223-375ff8d7a5a8/platn_repblica_libro_vii_resumen.pdfIn PDF document text
    • https://s3.amazonaws.com/wemofodi/integrated_fridge_freezer_buying_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/dewutexorob/employee_handbook_template_australia.pdfIn PDF document text
    • https://s3.amazonaws.com/lezerawe/admittance_control.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_off0000ce8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE8A 5204 bytes
SHA-256: cb39d08b5cec9377da5f496f1e3553e54e89dbf884c1a510b37edf5184652048
font_01_sfnt_off0000e04d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE04D 9972 bytes
SHA-256: cd6e2e3c90007fb8636cbbbd9f61afc4a2d6214560d96a2817ca38f720ceba49

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