Malicious PDF — malware analysis report

Static analysis result for SHA-256 1833deaa6265bb68…

MALICIOUS

PDF

78.3 KB Created: 2021-02-19 06:44:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 2721ba0d6211261cd667ad5c26f6975e SHA-1: 2a8b49430669864d4e33248c2d5275f33fd518aa SHA-256: 1833deaa6265bb68ca21a131aef2aad8ac59d806972791811eb6e7f32f6da3cc
96 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or redirection to malicious sites. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of numerous external URLs points towards a phishing or malicious content distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/123?utm_term=army+apft+standards+sit+ups+female PDF link annotation
    • http://wurulef.22web.org/luxury_collection_sheets.pdfIn PDF document text
    • https://remitibomuko.weebly.com/uploads/1/3/4/8/134853657/9231511.pdfIn PDF document text
    • https://tapajiwegunet.weebly.com/uploads/1/3/1/3/131380495/livifinuxaniwes.pdfIn PDF document text
    • http://bonapimum.iblogger.org/vawuligerupus.pdfIn PDF document text
    • http://appless.space/smps_circuit_diagram_with_explanation_pptudry3.pdfIn PDF document text
    • https://nolujamikudaze.weebly.com/uploads/1/3/4/8/134868466/linit_daxumiwu.pdfIn PDF document text
    • https://derajuxojop.weebly.com/uploads/1/3/1/4/131452827/00a63b.pdfIn PDF document text
    • https://bujubemido.weebly.com/uploads/1/3/0/7/130776032/dikizigovizi_fisajowamasega_difijepa.pdfIn PDF document text
    • https://javemutamutog.weebly.com/uploads/1/3/4/6/134638327/latijeb_nawujez_mowadatibidun_nijufadapibi.pdfIn PDF document text
    • https://burufazifefep.weebly.com/uploads/1/3/4/5/134584298/gikuritosifavojani.pdfIn PDF document text
    • http://dressnbuy.com/posttraumatic_growth_inventory1b0zn.pdfIn PDF document text
    • http://all-host.site/203960498254xfqo.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/dazinibonofobi/mac_os_mojave.pdfIn PDF document text
    • http://katewamopexo.rf.gd/microsoft_word_templates_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xoguwavosuje/69173879035.pdfIn PDF document text
    • https://s3.amazonaws.com/nowokil/tidazumusaduzixuduvuset.pdfIn PDF document text
    • https://s3.amazonaws.com/dinigugaxej/goal_setting_template.pdfIn PDF document text
    • http://sonazorapabame.epizy.com/nccn_guidelines_bladder_cancer_surveillance.pdfIn PDF document text
    • https://s3.amazonaws.com/nedijowewoded/vubofovifirulanej.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_off0000f3e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E9 5276 bytes
SHA-256: 75a15d76ec05f034c415f3a9a67bb1df366570e77e396b65f2f2eacb06f30d32
font_01_sfnt_off000105ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105CE 10664 bytes
SHA-256: 977ce064e726c004d67bdbb6abe9915e8c4ed80110adfd8b903aa31ec6756660

Open this report in the interactive analyzer, or submit your own file for analysis.