Malicious PDF — malware analysis report

Static analysis result for SHA-256 794739647a328520…

MALICIOUS

PDF

70.8 KB Created: 2021-03-11 05:17:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 205c0b95bc757ce628b8439130845609 SHA-1: 1035b9f1eeafea4cdcaa5680efaef655a76d868c SHA-256: 794739647a3285203778b8c6de44b1f252e6374455845477b9237ed6d718977b
186 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 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://dafemum.ru/123?utm_term=manuale+di+ortopedia+e+traumatologia+grassi+pdf PDF link annotation
    • https://rovisudaguxu.weebly.com/uploads/1/3/1/4/131438800/dejaruguwab.pdfIn PDF document text
    • https://xuxurebero.weebly.com/uploads/1/3/4/6/134673100/gorijejep-vigifepiliw.pdfIn PDF document text
    • http://xutesirifunevif.22web.org/fantasmas_en_el_cerebro.pdfIn PDF document text
    • http://honbiz.pro/519715237034ansk.pdfIn PDF document text
    • https://givifajilodox.weebly.com/uploads/1/3/0/8/130874655/811891856a.pdfIn PDF document text
    • http://good-production20.site/ergobaby_360_infant_insert_nzb6hj8.pdfIn PDF document text
    • http://zoosalon.org/windows_batch_file_syntax_checker8rmpn.pdfIn PDF document text
    • https://kekiwudegabute.weebly.com/uploads/1/3/0/8/130813612/7856965.pdfIn PDF document text
    • https://fomimixa.weebly.com/uploads/1/3/4/7/134775862/vogubi.pdfIn PDF document text
    • https://sibetufubexab.weebly.com/uploads/1/3/2/7/132712005/wijejopul_kaviwot_jopagagus.pdfIn PDF document text
    • http://sdek-24.cc/how_to_recover_my_fb_account_passwordf44py.pdfIn PDF document text
    • https://gopilabuvimira.weebly.com/uploads/1/3/1/4/131453416/6444572.pdfIn PDF document text
    • http://xuxazefovudiwe.iblogger.org/84230942698.pdfIn PDF document text
    • http://mediaverifiedbadge.com/849834711043ayto.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/suxuzubojut/betawirojamowedawudapi.pdfIn PDF document text
    • https://s3.amazonaws.com/folexapurilowe/bohr_atomic_models_answer_sheet.pdfIn PDF document text
    • http://rudufegasavu.rf.gd/corso_italiano_b1.pdfIn PDF document text
    • https://2e4d99de-9d37-4ce2-abd5-0bbccafdbe51.filesusr.com/ugd/33a2e4_fcf99b93d5d64b4381765fc0394eeaeb.pdf?index=trueIn PDF document text
    • https://1eb42bdc-3da6-4b32-b75f-4382f1721f8e.filesusr.com/ugd/35474d_b4a750cf0ead4b7492f1561ad8deded0.pdf?index=trueIn PDF document text
    • https://8eefcaf3-52f5-4123-8be5-b1f0aaeea45e.filesusr.com/ugd/1d3654_a355fb6347674383a07c7a3e547aed8b.pdf?index=trueIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d50f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD50F 5364 bytes
SHA-256: 8c35035c473797478650e08c2133655c05958aeb93d3e5e7d0a9afa1f515ffae
font_01_sfnt_off0000e748.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE748 11116 bytes
SHA-256: f56d7af85965b26ff571ac235adfe6c61e640b98505e7c24e5b4c84670bd8cb3

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