Malicious PDF — malware analysis report

Static analysis result for SHA-256 84936671f7f031ce…

MALICIOUS

PDF

67.0 KB Created: 2021-02-18 12:30:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: d93e18d3ea1e9853dd214345fd51c1d9 SHA-1: c308abe80f965a4505a5ab6dbfaddcdcdbecec16 SHA-256: 84936671f7f031ce75f81c3a3ec34fdf78b3a29fbb624f73026533f998a7a652
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 0.9998

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 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://bologen.ru/aws?utm_term=youtube+australian+wild+dogs+crossword+clue PDF link annotation
    • http://xevalarebufop.22web.org/ruwipiredaz.pdfIn PDF document text
    • https://cdn.sqhk.co/dadirowuj/mWifcWs/suvogumalesilafo.pdfIn PDF document text
    • http://uplrezina.site/hunter_xc_controller_wiringli8vv.pdfIn PDF document text
    • https://peniwifagupe.weebly.com/uploads/1/3/0/7/130738894/papogumol-pezaligov-xirilapoved-tidorugopiveded.pdfIn PDF document text
    • http://service-hire.com/romantic_ballads_songs3tvo9.pdfIn PDF document text
    • https://lowixuwegula.weebly.com/uploads/1/3/0/7/130775587/latosesewaxanu-daxajawem-jogaf-vumasugowi.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/goneduzum/melhores_livros_de_fico_cientifica_e_fantasia.pdfIn PDF document text
    • https://s3.amazonaws.com/tosego/ps_vita_pch_2001_vs_2000.pdfIn PDF document text
    • https://s3.amazonaws.com/zatasipezeg/manual_ciatica_sos.pdfIn PDF document text
    • http://nowavef.epizy.com/49159187430.pdfIn PDF document text
    • http://kekexebok.rf.gd/cyclopentane_most_stable_conformation.pdfIn PDF document text
    • http://punafifa.rf.gd/dewosibepobukagepejafovu.pdfIn PDF document text
    • https://s3.amazonaws.com/mipizaju/hartalega_financial_report.pdfIn PDF document text
    • https://s3.amazonaws.com/zonivezada/sikirisirisosuxu.pdfIn PDF document text
    • https://s3.amazonaws.com/bokelur/simple_compound_and_complex_sentence_structure_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/somisilegex/shin_chan_cute_images.pdfIn PDF document text
    • http://seromol.epizy.com/gugiduko.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_off0000c9e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9E5 5300 bytes
SHA-256: 20ac91d65044911f26c2a16d7bd2c4a6bdf3f164f8f1fc52d79eae71882fdbf9
font_01_sfnt_off0000dc0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC0C 10332 bytes
SHA-256: 9c5d4cd9b5d7eddcbf08dd17db66bb8bd96dd069381e93f77796ac9ba5b31b21

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