Malicious PDF — malware analysis report

Static analysis result for SHA-256 a72e92df8d4cbef5…

MALICIOUS

PDF

72.6 KB Created: 2021-03-22 14:40:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 326aeabfb2156ff37f2042d32f7fd872 SHA-1: 54873e464e439b26a7a894e03fa02c6eea214550 SHA-256: a72e92df8d4cbef52e642ae0e74e55080eaa87241c2295da23102e37c7c321e7
156 Risk Score

Malware Insights

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

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 0.9997

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 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://leonvi.ru/award?keyword=blastulation+in+mammals+pdf PDF link annotation
    • https://menesifewo.weebly.com/uploads/1/3/0/8/130814293/c94abb56950953e.pdfIn PDF document text
    • https://kovozewiridudu.weebly.com/uploads/1/3/0/7/130738567/tawisopidim_dupalazokelitel_lurogetenefixe_mexakasodaf.pdfIn PDF document text
    • https://xunijududivajol.weebly.com/uploads/1/3/0/9/130969830/mewolijenumomijaramo.pdfIn PDF document text
    • https://kujibolivobukib.weebly.com/uploads/1/3/1/1/131163991/mitukivexapuno-rudojaf.pdfIn PDF document text
    • http://strgb2.ru/char-broil_2_burner_performance_grill_coverxi9pe.pdfIn PDF document text
    • http://5coupons.info/how_to_light_magic_chef_rv_stoveu0frb.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/dosalapasenow/14916362568.pdfIn PDF document text
    • http://fubuwutunofo.rf.gd/pellegrino_artusi_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/rezugekolaba/fizazoli.pdfIn PDF document text
    • https://s3.amazonaws.com/garorowa/cunto_cuesta_una_prueba_de_adn_durante_el_embarazo.pdfIn PDF document text
    • https://s3.amazonaws.com/gadumagabusodel/vertex_tools_sketchup_free.pdfIn PDF document text
    • https://s3.amazonaws.com/likadojivivofu/arturia_keylab_61_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/vukujidor/conclusion_flemish_bond_report.pdfIn PDF document text
    • https://s3.amazonaws.com/muvazi/fugaxedorapuneravev.pdfIn PDF document text
    • https://s3.amazonaws.com/gotitibekovi/37533924962.pdfIn PDF document text
    • http://mageparojepu.epizy.com/97563515150.pdfIn PDF document text
    • http://napipipazapuka.epizy.com/colorlib_free_bootstrap_admin_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/muwomapotumugi/nipudomobosa.pdfIn PDF document text
    • http://fefadipif.rf.gd/novopivewiriwezumevadu.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubifirigevi/tropic_of_cancer_beach_rental.pdfIn PDF document text
    • http://fujameniv.rf.gd/cash_flow_statement_analysis_project.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_off0000dfb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFB8 5140 bytes
SHA-256: 3f39038470f95856a3afb8386b2d43ac610ed69db2a0bef55b6a1c8b0d8458d5
font_01_sfnt_off0000f127.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF127 10676 bytes
SHA-256: 95d32be395dbbcb56aaf679be4ccc22cef99dab5e0f2e21acd3fb9b3ca266e2f

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