Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b018da10d425388…

MALICIOUS

PDF

86.9 KB Created: 2021-09-16 05:55:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: f0e2acfe0adc0602025d673d347a9748 SHA-1: 2701e4d8c75f584aac1937abdf3e415618ef8c1a SHA-256: 6b018da10d4253881d9babc755b07dad08f3b6b27f15650384964b2abfc6bcad
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, suggesting a link farm designed to lure users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were directly extracted, the structure and URL patterns are consistent with a phishing lure attempting to trick users into downloading unwanted software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://irlanc.ru/uplcv?utm_term=fnaf+2+apk+download+full+version PDF link annotation
    • http://svadbavmoskve.com/content/xuploadimages/file/rezitopopedejidixilirosor.pdfIn PDF document text
    • http://intertexmedical.com/userfiles/files/27335630519.pdfIn PDF document text
    • http://smwiarus.pl/ckfinder/userfiles/files/37296965813.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e75768ccf0---tuzafebulegoxavujok.pdfIn PDF document text
    • http://digitalpolicycouncil.com/imagenes/file/zubobuwotirefoji.pdfIn PDF document text
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/ruseririxubolakam.pdfIn PDF document text
    • http://kronikarp.pl/ckfinder/userfiles/files/gifiro.pdfIn PDF document text
    • http://giteduguedesboires.com/userfiles/file/damibezixubisemelepudubo.pdfIn PDF document text
    • http://pk.mo/userfiles/file/renudimilumirerorek.pdfIn PDF document text
    • http://mathcountsoutreach.org/userfiles/file/44850184114.pdfIn PDF document text
    • http://www.mustwalge.ee/data/content/files/fupijafini.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/3ubkmal4ep9bvvpkdkf13v98tt/68485270728.pdfIn PDF document text
    • http://geteffective.biz/uploadfiles/file/pixusipapap.pdfIn PDF document text
    • https://funbugs.ie/userfiles/file/kukuwuvagunin.pdfIn PDF document text
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16130963d05773---dizasurudirapulidedo.pdfIn PDF document text
    • http://bobas24.pl/Upload/file/10031734588.pdfIn PDF document text
    • http://armiikrajowej36.pl/public/upload/ckfinder/userfiles/files/kuvilusoxoterepopek.pdfIn PDF document text
    • http://kelvista.lt/images/files/94338736000.pdfIn PDF document text
    • http://faw-asia.com/image/upload/files/57102879475.pdfIn PDF document text
    • https://www.profiemg.cz/upload/ck/files/ganazejitaguj.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/c5nfjasf4up21j11b5q79cbqm3/xoxalabefokizebawofofe.pdfIn PDF document text
    • http://zuche0551.com/upload/file/12483533082.pdfIn PDF document text
    • https://ctners.com/ckfinder/userfiles/files/93604094.pdfIn PDF document text
    • http://otoozevran.com/resimler/files/jefituzazobemonibafomamel.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://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_off0000eff8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001080a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1080A 17160 bytes
SHA-256: 81af0804db10f751d23625affc5d77708fd63f53e9c24c9ec192753f86c76e98
font_02_sfnt_off00013487.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13487 10832 bytes
SHA-256: fc688aae5ee0fc6b5a703e39c82f4356a8e7da1e51e366cb89a58d322007b256

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