Malicious PDF — malware analysis report

Static analysis result for SHA-256 073de88bc9872dd5…

MALICIOUS

PDF

74.7 KB Created: 2021-09-09 11:44:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: bb92fd9ebf7f95b5d6470288fac5234b SHA-1: 9f03b22737e5a535c9f940abdc651a008eeb4e58 SHA-256: 073de88bc9872dd52ca59d1cf0400dec78894c7c22e1a199e86bd8768b46bf4e
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file containing embedded JavaScript, which is a common technique for executing malicious code. The presence of numerous external links, many pointing to disposable domains, suggests a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9827

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://generale-bureautique.fr/gdb/files/file/timikejojakimo.pdf In PDF document text
    • http://timnhanhonline.net/upload/files/maxuzaf.pdfIn PDF document text
    • http://cephedanismani.com/images/pages/file/82206287898.pdfIn PDF document text
    • https://reviewz.eu/app/webroot/files/userfiles/files/saradopura.pdfIn PDF document text
    • http://skupka54.ru/upload/m/5791776175.pdfIn PDF document text
    • http://felixefontesadvogados.com.br/ckfinder/userfiles/files/84520789587.pdfIn PDF document text
    • https://ags-car.com/upload/files/rivopij.pdfIn PDF document text
    • https://uangraja.com/contents/files/xupob.pdfIn PDF document text
    • https://aannemingsbedrijfbarthulsbosch.nl/userfiles/file/tumimenexodunerudiw.pdfIn PDF document text
    • https://kaparatt.com/images/File/95281794176.pdfIn PDF document text
    • https://batikatravels.com/userfiles/file/75547142107.pdfIn PDF document text
    • https://adikmanis.com/contents/files/wulujedodaxetanaxa.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613621cfca908---sibodinerok.pdfIn PDF document text
    • http://lse.hu/userfiles/file/10877420285.pdfIn PDF document text
    • http://1careglobal.com/upload/files/1759205863.pdfIn PDF document text
    • http://bjerkelunden.org/content/files/userfiles/file///14874376046.pdfIn PDF document text
    • http://due.pt/js/ckfinder/userfiles/files/pazolo.pdfIn PDF document text
    • http://massimosusto.eu/userfiles/files/kisigugenodon.pdfIn PDF document text
    • https://pharma-tools.pl/galeria/file/5891751390.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/161300b05ecd1c---4445919043.pdfIn PDF document text
    • https://www.db-ynox.fr/ckfinder/userfiles/files/66217991581.pdfIn PDF document text
    • http://itineraire-consulting.com/ckfinder/userfiles/files/51776727461.pdfIn PDF document text
    • http://xn--e1aaafipco3bk8gra3b.xn--p1ai/upload_picture/file/jegojidiki.pdfIn PDF document text
    • https://ozmutludokum.com/userfiles/file/54452429963.pdfIn PDF document text
    • https://chupwo.com/editor_upload/file/14133020800.pdfIn PDF document text
    • http://hyundaiokla.com/uploads/files/63474968271.pdfIn PDF document text
    • http://armiikrajowej36.pl/public/upload/ckfinder/userfiles/files/36178021950.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=punchline+algebra+book+a+answer+key+pdfPDF 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_off0000bbae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBAE 11336 bytes
SHA-256: e63c5fe402f29835d90f21272deaa8cb3a12a225bfa2e7ecb5f0790a4b50ee5a
font_01_sfnt_off0000d5e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5E2 18340 bytes
SHA-256: 09408ab67536233300760806e77932b7344e88fa79286402bd0f20744a392a86
font_02_sfnt_off000104ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104ED 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1