Malicious PDF — malware analysis report

Static analysis result for SHA-256 00882d9429c78034…

MALICIOUS

PDF

71.4 KB Created: 2021-09-16 23:14:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 7531840536a0fda49b5b5b4caa467bd2 SHA-1: 4aecc9c7c72aceaf2d559f290269ae0254e8f0d7 SHA-256: 00882d9429c78034232de21f82697f96906faa388e738c3af434bf4bf298211d
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. It also features numerous external URIs, many hosted on disposable domains, suggesting a link farm or phishing lure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to redirect users to malicious sites for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://innotack.com/userfiles/file/94409736487.pdf In PDF document text
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/8e1fbc635ae0adba392a550445f24cfa/44176151610.pdfIn PDF document text
    • http://manu-transport.com/documents/file/gabibezi.pdfIn PDF document text
    • http://fandimnarodaku.cz/upload/file/62286876455.pdfIn PDF document text
    • https://tw-itemaos.com/ckfinder/userfiles/files/17678990558.pdfIn PDF document text
    • http://tufaghanafc.com/js/ckfinder/userfiles/files/59572751679.pdfIn PDF document text
    • http://pickup-ws.com/userfiles/files/puzor.pdfIn PDF document text
    • https://inmaabiladi.com/userfiles/files/vukonatasugepezup.pdfIn PDF document text
    • http://rts-3.ru/upload/files/32859318232.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/1613679c68582b---71508298909.pdfIn PDF document text
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/1612fb839e7d98---66860876975.pdfIn PDF document text
    • https://dom4m.de/userfiles/files/melovam.pdfIn PDF document text
    • http://sanraimundo.cl/dyn/uploads/file/16198548130.pdfIn PDF document text
    • http://laboratoriodiprogettazione-ve.it/userfiles/files/23008371105.pdfIn PDF document text
    • http://lustigersteirer.at/userfiles/file/vudojenovejexip.pdfIn PDF document text
    • http://tetrafluoro.com/upload/files/ladenisofulesokumuxa.pdfIn PDF document text
    • http://playonathletics.com/userfiles/file/nuvadevize.pdfIn PDF document text
    • https://auto826.com/uploads/files/97501773129.pdfIn PDF document text
    • http://sarkanyhajo.hu/files/file/motonazovumosuv.pdfIn PDF document text
    • http://www.jfac.kr/ckfinder/userfiles/files/6370170942.pdfIn PDF document text
    • https://hoangphatdanang.com/uploads/image/files/dujadutemifutowa.pdfIn PDF document text
    • https://projetovm.com/uploads/files/85767205691.pdfIn PDF document text
    • https://feldmann-spedition.de/pics/userfiles/file/kazewejidomilewe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=simoleons+cheat+simcity+builditPDF 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_off0000b438.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB438 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cc4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC4A 16528 bytes
SHA-256: 64ae07a8046ab85f3f8044608414319d9efbdb74add5504ac519149bc88608d2
font_02_sfnt_off0000f6e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6E0 10964 bytes
SHA-256: 1ab532a74cfc8acf50a9223247f692780d00947862e41b81cacf25e78fbf007a

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