Malicious PDF — malware analysis report

Static analysis result for SHA-256 d488fcff09e6e933…

MALICIOUS

PDF

86.9 KB Created: 2021-06-30 03:35:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: d139b45a2d202249eb44c38a40ef78a3 SHA-1: bd6f1080b68f0c418e5c3b8c9b1f05202aca32b7 SHA-256: d488fcff09e6e933b698f989cfd4b72df9659b120c4d343e5274c0b90cb3fa1b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing lure. It contains numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting an attempt to redirect users to malicious content. The heuristic 'SE_INVOICE_LURE' indicates the document's content is designed to mimic an invoice or payment request, further supporting the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://aivieksteslaivas.lv/userfiles/file/15469703093.pdf In PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d7a8738b9b---fuwurobe.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160844d22ec155---pisolowudafamorukurem.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160769986a27e5---41028140281.pdfIn PDF document text
    • http://1-cx.com/ckfinder/userfiles/files/lidikifezerit.pdfIn PDF document text
    • http://hani-bee.com/userfiles/files/86495455436.pdfIn PDF document text
    • https://marmarases.com/upload/ckfinder/files/18967708383.pdfIn PDF document text
    • https://www.cittadelmiele.it/wp-content/plugins/super-forms/uploads/php/files/0d30b0bb86b0ab62a07b107825c72a04/tupanirovamokomewomal.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/a22bee44fb2dfa0c9953b8c890337cb9/gosurepikibaket.pdfIn PDF document text
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/5135701986093c52bd8649.pdfIn PDF document text
    • https://universal4shipping.net/userfiles/file/67360475430.pdfIn PDF document text
    • http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/38239e37e1cbfa491d5896d9bc228917/68606585655.pdfIn PDF document text
    • https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/860b1e576c3d96ab964504e70ad49e28/64300881234.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8b02286e79---muxarosegalagubajivi.pdfIn PDF document text
    • http://topcudental.com/img/userfiles/files/luzawafazifax.pdfIn PDF document text
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/1t8bsuh7l23m599tqsqkq06pt4/juvamilobuj.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/v09gg0tt5ij1c28g60ibkj55fn/66042003719.pdfIn PDF document text
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160b22b95bd547---63275938330.pdfIn PDF document text
    • http://apexibd.com/uploads/fck_uploads/file/59261920095.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/160d07ba71f974---50250583190.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/f2rliia60svedn4m0f6aue7jh8/nuwewimube.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160ad24acae60a---29659705435.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607b9d6108fb4---pagobepogedefu.pdfIn PDF document text
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/rtoin31vassodnou98eg7bag6f/debexoxokam.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=entry+for+prepaid+expensesPDF 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_off0000f0b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0B6 10644 bytes
SHA-256: e0c61830b1bf5a8689710e831fb76ef11f449f6d1cdd50b2b4d0fe96df896ab1
font_01_sfnt_off00010940.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10940 17540 bytes
SHA-256: 1ed3a76361b4a9aac2aa8d1d43fd196e6eab1b02de3b3621ed5a137383cb3890
font_02_sfnt_off00013667.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13667 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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