Malicious PDF — malware analysis report

Static analysis result for SHA-256 69567480bbc3038e…

MALICIOUS

PDF

94.5 KB Created: 2021-06-28 08:03:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: ca0afab152534874747012a2f3c69264 SHA-1: fd31edf2e0db643d74f649b6a2365dc859750251 SHA-256: 69567480bbc3038e441d6229d3395c1873573f87c761e048d2f91c1ed14f6cc9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous embedded URLs point to compromised CMS uploads and disposable hosting, indicating a link farm designed to redirect users to malicious content. The document body is heavily obfuscated and unreadable, suggesting an attempt to hide its true purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608300c817fac---wilatejegujuvujagopenu.pdf In PDF document text
    • https://aartipalette.com/userfiles/file/paropisikoxide.pdfIn PDF document text
    • https://wagaskar.com/media/35314261220.pdfIn PDF document text
    • https://transport-vehicules.fr/userfiles/file/bonowimigiv.pdfIn PDF document text
    • http://aep-tc.com/cache/fck_files/file/33161738874.pdfIn PDF document text
    • http://shsuorui.com/uploadfiles/fckeditor/20210622/file/16243554833142.pdfIn PDF document text
    • https://idd.no/ckfinder/userfiles/files/posawijatom.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/cd03ef4c909f676bed8f40fae9b107a8/sugazewotimujijeb.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16084832e363c0---sotisebowevato.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160813ec014f1f---xekixuzerugimiboki.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160bd84ee2f820---junab.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/a1sqq78cu1n461rk0tlfvht34k/47517721886.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b170ce73abc---74761809307.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/160998a7c9262a---zezetotudave.pdfIn PDF document text
    • https://www.dartmusicfestival.co.uk/wp-content/plugins/super-forms/uploads/php/files/67ce3d6cd685f7fcb4c1a97dd131863b/lasikabixup.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/160d9127d3d4fa---30796439173.pdfIn PDF document text
    • http://maekalocal.com/Maeka/UserFiles/File/72133273596.pdfIn PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/30d4c4fec5e3d31eeaf4ab0dc936fdf6/rolobusenudulixuno.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608630e82d82a---79474437788.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/hk94rs1vqs7g4fbkj90t3h49m0/70163816462.pdfIn PDF document text
    • http://www.advokat.com/app/webroot/img/fck/file/87707840129.pdfIn PDF document text
    • http://teifsepahan.com/files/file/68956636861.pdfIn PDF document text
    • http://vandientuchinhhang.com/upload/files/musenoxibakipugusap.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=breath+of+the+wild+60fpsPDF 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_off00010034.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10034 10920 bytes
SHA-256: 663c689b374d310c62625ee6e5e48fa0f60f9f32ffd2dafce31b84ae30a34472
font_01_sfnt_off000119b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119B2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000131c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131C4 30032 bytes
SHA-256: 01dba85e45eca5b0d381060a1d8dde1f9e16e729dd9fc62f7bf26cbdf2db3edd

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