Malicious PDF — malware analysis report

Static analysis result for SHA-256 75a797b499b23253…

MALICIOUS

PDF

78.6 KB Created: 2021-09-11 02:47:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: cdac45b0c17cca90e792d99bfc6e5473 SHA-1: d08e3c6183bfc28525e67089b84d6fb845f44085 SHA-256: 75a797b499b232534c1917de1a7ee80a13114bf69c4f3c9f0b2e3d83e6490f23
156 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple potentially compromised or disposable hosting sites. The embedded URLs suggest an attempt to distribute further malicious content or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9844

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://freeware-software-download.de/uploads/editor/file/dofuwazepemezi.pdf In PDF document text
    • http://www.shjkyq.com/up_files/FCK/file/nusafiwenevazojuvovepefo.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137d031981c6---62112399321.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613be840225ce---kofilidi.pdfIn PDF document text
    • http://szymonadamczyk.pl/uploads/fck/file/wenixumi.pdfIn PDF document text
    • http://xedaptap.net/userfiles/file/67905304592.pdfIn PDF document text
    • http://kahasat.cz/data/file/57008224626.pdfIn PDF document text
    • http://flooroverstock.com/admin/userfiles/file/60298424831.pdfIn PDF document text
    • https://berettyotv.hu/userfiles/files/vivijiduta.pdfIn PDF document text
    • https://clicksnepal.grnca.org/img/files/files/piwabujiposesex.pdfIn PDF document text
    • http://electrogalicia.com/electrogalicia/recursos/archivos/supifolutixunifunudewof.pdfIn PDF document text
    • http://angelojrobles.com/admin_initial_test/userfiles/file/bedamozuzukalojigagopok.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/a2e8a34ee6ba4d2fde25a48d25ca7b98/buzatasegoladiwen.pdfIn PDF document text
    • http://thebankcardservice.com/uploads/files/mebasilefoliwutozuva.pdfIn PDF document text
    • https://fotobolfestmeny.hu/mvc/userfiles/file/ronavaza.pdfIn PDF document text
    • http://rejs2013.cycling-recycling.eu/imgturysta/files/jufuziwegonivita.pdfIn PDF document text
    • http://fibertechnique.com/tmp/file/fozuwonedorafufolibi.pdfIn PDF document text
    • https://hkparkkonutlari.com/image/files/60788484977.pdfIn PDF document text
    • https://www.lucaslobker.com/minor/ckfinder/userfiles/files/60202897346.pdfIn PDF document text
    • http://baobianhkhang.com/upload/files/83338944029.pdfIn PDF document text
    • https://schmitz.cz/res/file/39576445331.pdfIn PDF document text
    • http://stoka-saarlouis.de/userfiles/file/foxuba.pdfIn PDF document text
    • http://splogservice.ru/content/file/kesol.pdfIn PDF document text
    • https://rasathantrananotech.com/ckfinder/userfiles/files/84711196886.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16133fb39912ef---kebawap.pdfIn PDF document text
    • http://kor-ra.ru/UserFiles/file/zidufuwetusudiz.pdfIn PDF document text
    • http://cp-tournament.org/ckfinder/userfiles/files/35451715156.pdfIn PDF document text
    • http://hypotekaprezamestnancov.sk/res/file/rinodosizazajoz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=ghost+of+war+androidPDF link annotation
    • 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://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_off0000c961.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC961 19788 bytes
SHA-256: be9a23837d4f89288a6899796231628c78395c3650f9cc0181078f0f2d3a968b
font_01_sfnt_off0000fd24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD24 10400 bytes
SHA-256: 326e641b6a018b2d888a392a244a66634623b77ba6bc57a3fb30688578ede794
font_02_sfnt_off000114bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114BF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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