Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa2fd76972485cb6…

MALICIOUS

PDF

87.3 KB Created: 2021-03-20 16:12:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: eb77a9732d2fc8d3e4ee833487b9e684 SHA-1: 74e8127b34832db3e69a1e24e7b1f46ce5087e9a SHA-256: aa2fd76972485cb6636c91b3cac5f30020f11e9e27c848c27b00f97d412e7265
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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://zajinet.ru/award?keyword=clasificacion+de+las+empresas+turisticas+pdf PDF link annotation
    • http://nujipam.iblogger.org/area_of_combined_shapes_worksheet.pdfIn PDF document text
    • http://123dutch.com/sitivimuzutulu46dii.pdfIn PDF document text
    • https://cdn.sqhk.co/sijiposago/cjcDiaC/kubewogorozag.pdfIn PDF document text
    • https://cdn.sqhk.co/pedidagow/5i6hgig/peruxakovemikodiwoxabi.pdfIn PDF document text
    • https://cdn.sqhk.co/lirotigi/JhaWihd/polerusegidabo.pdfIn PDF document text
    • http://marketes.pro/fatshark_predator_v2_diversity_moddmibe.pdfIn PDF document text
    • https://cdn.sqhk.co/kakapoxavu/flhkMFq/zililesadedi.pdfIn PDF document text
    • http://tasunixupowife.66ghz.com/bavejodufizitorob.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/fulazelof/how_do_i_fix_asus_preparing_automatic_repair.pdfIn PDF document text
    • https://80b1f93a-fe74-4439-a81d-34814fa7a505.filesusr.com/ugd/e56fe2_c45c238524ce43ad8e6c57cc49b9edd8.pdf?index=trueIn PDF document text
    • http://tokavasetalan.epizy.com/wosipodoguzekubobowipure.pdfIn PDF document text
    • https://6f12065f-c45d-410c-b048-6ec23fb2b810.filesusr.com/ugd/02ccf7_4b4312ed04fd4f609030bc3cdb68ff83.pdf?index=trueIn PDF document text
    • https://40ba1f7a-6e91-49bb-bbb8-dfbb40a2bc60.filesusr.com/ugd/22bf55_f20a398432fd41c5b78710836bb91fac.pdf?index=trueIn PDF document text
    • https://43081b45-6e48-4b43-b724-9328fda377ae.filesusr.com/ugd/26481d_ba281be7745346a7bdc87e23af94a9f5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/feseni/anatomy_and_physiology_body_systems_worksheets.pdfIn PDF document text
    • http://vikuladaputak.rf.gd/zudetov.pdfIn PDF document text
    • http://japimokenixovip.epizy.com/sijetaxuvisur.pdfIn PDF document text
    • http://nasakil.rf.gd/66152679003.pdfIn PDF document text
    • http://luzigipo.epizy.com/vivonotidikowinodiburav.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_off00011376.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11376 5208 bytes
SHA-256: 89b2370ceeec860a7d15c9240035412c940e8ade7ef04b18b50dcf01069e008a
font_01_sfnt_off0001250f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1250F 12772 bytes
SHA-256: 110219d0c11f72204f977b119f6231964c8443b0b1f7b2c641dd7e4dc53905f0

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