Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3da0706cc5e3633…

MALICIOUS

PDF

102.7 KB Created: 2021-04-01 10:29:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: de0286ec1a992041c8bbe49e12adcc93 SHA-1: 550c5c592d24a6127e7bcd846dc02fcbccf671fc SHA-256: d3da0706cc5e363309c28ac82b160ac15a92feecc3822d276d8ba051e1a14ca1
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 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://jumiwimov.ru/award?keyword=cdc+malaria+life+cycle+pdf PDF link annotation
    • http://memiwuv.mygamesonline.org/hoover_steamvac_v2_with_rinse_parts.pdfIn PDF document text
    • https://paguzijap.weebly.com/uploads/1/3/1/4/131453408/9514037.pdfIn PDF document text
    • https://kuzosilu.weebly.com/uploads/1/3/2/8/132815793/welijokakepesi-nisanin.pdfIn PDF document text
    • https://pevaluxuduta.weebly.com/uploads/1/3/4/5/134502983/fubagewonabi.pdfIn PDF document text
    • https://rusuzewaridoxi.weebly.com/uploads/1/3/4/7/134761315/8f4e3d8550931fb.pdfIn PDF document text
    • https://cdn.sqhk.co/lojenozasila/j9YjSpn/coc_daily_deals_free.pdfIn PDF document text
    • https://cdn.sqhk.co/zepigelona/ieGijbA/saudade_definition_origin.pdfIn PDF document text
    • http://tujidal.mypressonline.com/70978424528.pdfIn PDF document text
    • http://tuzogat.sportsontheweb.net/tiralexuradezupegafura.pdfIn PDF document text
    • https://cdn.sqhk.co/nowavutu/v6POjc4/zefajowi.pdfIn PDF document text
    • https://vafumesaz.weebly.com/uploads/1/3/4/5/134589630/guriwere.pdfIn PDF document text
    • https://kagoninu.weebly.com/uploads/1/3/1/4/131453226/f95abd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d80868e2-5d34-4dda-9345-0396294a35aa.filesusr.com/ugd/f9fac6_935026c3c24640a0932578523296f0b2.pdf?index=trueIn PDF document text
    • https://44407f20-7244-4107-9544-84d8151b6f9a.filesusr.com/ugd/8508de_7984ea899fb44b51b7421bb2ca205153.pdf?index=trueIn PDF document text
    • http://lazasubesuwup.epizy.com/cainite_heresy.pdfIn PDF document text
    • http://tofegegumenoz.rf.gd/pancreatic_cancer_diet.pdfIn PDF document text
    • http://sefibonep.rf.gd/18212661456.pdfIn PDF document text
    • http://zubumedi.rf.gd/wifukudetoputo.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013997.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13997 5132 bytes
SHA-256: 4c91841174b860b4c77c13b259ab2b52ac46b8886a40f234d7e1fbe8027b7074
font_01_sfnt_off00014afb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14AFB 14712 bytes
SHA-256: 069aa55ec1ac6b31bd58f5d83e6507497c2b0f28cdb0ff75f1beb429f7f6c311
font_02_sfnt_off00017881.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17881 16148 bytes
SHA-256: 49436f94d5abf10ca6af8af9848174aab82dfe7bc58a5146411d238fd5c76648

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