Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0851821cbfed49a…

MALICIOUS

PDF

65.0 KB Created: 2021-02-13 17:51:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: c9ffafd48ac577198d2743f166d1b6c4 SHA-1: 2e1efd3ddb6b1b7c159a1d3410bcee276d7b49af SHA-256: a0851821cbfed49ac1fcf1ac4ade616c3df9a428d6838019b2308fdd8813b95d
96 Risk Score

Malware Insights

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

The file is a PDF document flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier. It contains an embedded URL pointing to 'bologen.ru', which is likely part of a phishing or scam attempt. The document body, though heavily obfuscated, contains keywords related to the embedded URL, suggesting an attempt to disguise malicious content as legitimate information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/wix?keyword=brain+plus+iq+reddit PDF link annotation
    • https://dapalijika.weebly.com/uploads/1/3/0/7/130738969/3026158.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444357/normal_602221253dfd3.pdfIn PDF document text
    • http://paganel.world/65033561253n964n.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393220/normal_5feb8d620af39.pdfIn PDF document text
    • https://sexuviruzimi.weebly.com/uploads/1/3/2/8/132814305/3f98b3d2d07c7ea.pdfIn PDF document text
    • https://gotagifegu.weebly.com/uploads/1/3/1/6/131607164/fovepo-sakamenifidoxap-misaxinisakaxen-dimefu.pdfIn PDF document text
    • https://mojavewebodaraz.weebly.com/uploads/1/3/1/1/131163943/zosowolisuzev-vefasa.pdfIn PDF document text
    • http://mmmmmme.space/bushnell_8mp_trail_camera_manual8alkj.pdfIn PDF document text
    • http://pokypka.xyz/batawenuvolid5mdne.pdfIn PDF document text
    • http://kulinar2020.site/soul_retrieval_mending_the_fragment96t2e.pdfIn PDF document text
    • https://wadabugijiri.weebly.com/uploads/1/3/0/8/130873870/58ca2583bd1c.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/galinikagopit/64923790878.pdfIn PDF document text
    • https://s3.amazonaws.com/kosipefojaw/do_dryer_sheets_kill_dust_mites.pdfIn PDF document text
    • http://zutilokip.epizy.com/gym_cleaning_checklist_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/wajufifenoxuj/gibos.pdfIn PDF document text
    • https://s3.amazonaws.com/vanatul/79855910776.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_off0000c215.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC215 5128 bytes
SHA-256: a53dba6b55efba4f46dfb26d74bead5bb665c9abf41fcd25a2f25adc2ce0cdfc
font_01_sfnt_off0000d38c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD38C 10472 bytes
SHA-256: daaf2219e9e00703ef902fc4ea7a136a657183ea35c2b9895d8f125acd40462f