Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e4ac7473a1d8eb7…

MALICIOUS

PDF

75.1 KB Created: 2021-02-23 09:10:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 8f7e8752730cac80c4869890fa3932b1 SHA-1: 7f4d90b62477bf65ab387d6496393205f852d30f SHA-256: 9e4ac7473a1d8eb7fb6015e986d9cd61bcc5d84c6bc2aa9ff84be51bbc060058
66 Risk Score

Malware Insights

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

The PDF document contains a high number of embedded URLs, many pointing to disposable domains and employing UTM parameters, indicative of a link farm or redirection scheme. The ML classifier strongly flagged this PDF as malicious. While no scripts were extracted, the sheer volume of external links suggests an attempt to drive traffic to potentially malicious or ad-filled sites, possibly as a precursor to further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://druttle.ru/strik?utm_term=is+the+lincoln+mkx+a+reliable+car PDF link annotation
    • https://cdn.sqhk.co/tokititagiwe/thhvsje/fomipojiwapiwusenebawob.pdfIn PDF document text
    • http://itasummer.fun/dofodajafuxeduwuwoxuvefa7fwqn.pdfIn PDF document text
    • http://antonio-ita.space/63992420656084lh.pdfIn PDF document text
    • http://copyrightsupport-ig.com/android_studio_flutter_wrap_widgetkj6zf.pdfIn PDF document text
    • http://sitajejo.22web.org/types_of_influence_tactics.pdfIn PDF document text
    • http://beststudent.space/weriladinasevazabomubaw78tbn.pdfIn PDF document text
    • http://cardioactiveuficiale.site/oxford_dictionary_english_to_tamil_free_download2go4y.pdfIn PDF document text
    • https://cdn.sqhk.co/goduwonon/KjbIzhi/fill_holes_in_drywall_before_painting.pdfIn PDF document text
    • https://cdn.sqhk.co/dukoredod/IdyNhaI/juvubituvazakur.pdfIn PDF document text
    • http://leree4.club/sopegob750o.pdfIn PDF document text
    • https://cdn.sqhk.co/pofevadamem/bjjjQi4/puwupuwojumijozuwe.pdfIn PDF document text
    • http://svoytrylend.xyz/fagegubemepal54rd3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bizosubage.rf.gd/cuales_son_los_tipos_de_medios_de_comunicacion_que_existen.pdfIn PDF document text
    • http://jalovunenenema.epizy.com/autoformation_windev_17.pdfIn PDF document text
    • http://bulexaresozo.rf.gd/dogwood_planting_guide.pdfIn PDF document text
    • http://xovigogijexivof.epizy.com/porizuzupagat.pdfIn PDF document text
    • http://girupesoja.rf.gd/ieee_format_report.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_off0000e8f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F0 5248 bytes
SHA-256: ee8a9409b7e5ce80b0aef5d0a944213656b15d0d2689fb4a64d328d2a27d7485
font_01_sfnt_off0000fa9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA9E 10784 bytes
SHA-256: f99536e85da96426fc31ae0b64dd81e876b118ace03b523e93bd82f7c9a2e345

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