Malicious PDF — malware analysis report

Static analysis result for SHA-256 025cc80a5e9d0402…

MALICIOUS

PDF

89.1 KB Created: 2021-03-24 10:28:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 398bfc84424a959d31226b307f1a45cd SHA-1: 960bc1e6604874b1f69f0f27cb7114b512511e41 SHA-256: 025cc80a5e9d0402bcb8c4ec540660cdcdf4dc6cd4912bebeb53d5b4a64f6ff2
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 0.9995

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://gimoguvi.ru/award?keyword=functional+analysis+in+clinical+psychology+pdf PDF link annotation
    • https://mirulunus.weebly.com/uploads/1/3/1/1/131164386/4686181.pdfIn PDF document text
    • http://derifupiwa.mypressonline.com/vizufizubamuwujilu.pdfIn PDF document text
    • http://new-volosi.ru/vebetesupuwasemuvide7o4jg.pdfIn PDF document text
    • http://pofaduxiruk.getenjoyment.net/fallout_4_ps4_controller_pc.pdfIn PDF document text
    • http://fofiwafajelerax.sportsontheweb.net/jagipapegodovibovil.pdfIn PDF document text
    • https://sakurulemiba.weebly.com/uploads/1/3/0/9/130969926/e5da71d.pdfIn PDF document text
    • http://ses-paypal.com/pipoxim49j39.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/nisoxow/kuwameju.pdfIn PDF document text
    • https://32e47638-7206-44c1-ad53-5c6f9176402e.filesusr.com/ugd/e00742_dad113d273e04b328c375fc3a149f008.pdf?index=trueIn PDF document text
    • https://5f8b0e40-2141-4341-98ab-6145db4b8156.filesusr.com/ugd/2072cd_db698c45fecf4fa69e163094d93d8325.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/22331560419.pdfIn PDF document text
    • https://dedb376b-efc3-4528-ac10-fc65d12f866c.filesusr.com/ugd/5f6074_fa0a127870a54c5f99bcd41019e223d1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/feborobegibew/senadidubufegupotosip.pdfIn PDF document text
    • https://s3.amazonaws.com/tadevewuju/cdr_navy_full_form.pdfIn PDF document text
    • https://s3.amazonaws.com/bisiku/25012862058.pdfIn PDF document text
    • http://vujapoguxesak.myartsonline.com/propresenter_5_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/xeropizuwe/80019814387.pdfIn PDF document text
    • http://jisunopesaluzi.atwebpages.com/ramadan_time_table_2020_delhi.pdfIn PDF document text
    • https://d5aacb37-8766-4234-9cc8-c2ec3b911aba.filesusr.com/ugd/1e723b_ae269e6400fb40c6a1dd584f0abf38d3.pdf?index=trueIn PDF document text
    • https://ef733714-782c-48ea-8991-1bc0bf0c95f2.filesusr.com/ugd/ad2ade_f7ea2c2f97aa453f9cde59011fd60203.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nazekisigiduz/magical_books_of_solomon.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001114c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1114C 5144 bytes
SHA-256: 7eddca84e1db6d4542046eb1d667e7af67fffa83bf5e2a1156a444ac8e8f5d62
font_01_sfnt_off000122c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122C9 11056 bytes
SHA-256: 1d60db0cece2c6254a00c6b01d410fde6d3365d05d7ee976f81ac18efae0d592
font_02_sfnt_off00014872.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14872 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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