Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2212c9de352baea…

MALICIOUS

PDF

87.4 KB Created: 2021-07-20 12:01:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: a08becb106d04f727144c1f6e50d55f1 SHA-1: c66900f7b81b726ab7b4da1112d3f8b451e7c258 SHA-256: f2212c9de352baeab7e9f6cf9f69f64fb7095e4bbd1415a157a986fb2ee81708
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was detected as malicious by ML classifiers and ClamAV, exhibiting characteristics of an advance-fee scam. It contains numerous links, many pointing to compromised CMS upload storage or disposable hosting, suggesting a tactic to distribute malicious content or phish users. The document body was unreadable, but the heuristics strongly indicate a lure related to lotteries, prizes, or parcel deliveries.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://esistore.be/userfiles/file/kugeparagefakemivejajif.pdf In PDF document text
    • http://riverside-plaza.com/upload/userfile/files/7248262287.pdfIn PDF document text
    • http://2m-m.eu/userfiles/files/puvuviwasinuzarebulef.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/47acc0cc89e0b4a9ba5299c275be4e9f/jilivobipadofikowux.pdfIn PDF document text
    • http://outspokenholland.com/userfiles/fckFile/20210601125951.pdfIn PDF document text
    • http://spearsyounglegacy.com/clients/b/b2/b2c23f164518415ec8f3c1c8d0af542d/File/381211459.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/c2f80756cd8f8deddee81af12da305a6/17327188546.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607794675c826---52432059655.pdfIn PDF document text
    • http://atreve.eu/ubezpiecz/obrazy/file/jujunen.pdfIn PDF document text
    • http://andrenickels.de/ckfinder/userfiles/files/77915192294.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca7c8a5101---76461414159.pdfIn PDF document text
    • https://goodluckfishing.com/ckfinder/userfiles/files/dirofudij.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/nunoxiwowapetevenopewexe.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9a3c6be7f2---44167247324.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c7330031694---mokibalanezil.pdfIn PDF document text
    • http://aircond.md/upload_fck/file/gogalewodetoxenikuradumo.pdfIn PDF document text
    • http://dansensvenner.dk/imagesfile///kufudidawetagodolutub.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608c397729f81---dizoxodejawobuzawagero.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/160adf5f154beb---44361678752.pdfIn PDF document text
    • http://keyflounge.nl/userfiles/file/nelidakuwe.pdfIn PDF document text
    • http://grandp.ru/userfiles/file/lezalakuf.pdfIn PDF document text
    • https://bkht.vn/userfiles/file/54800250783.pdfIn PDF document text
    • https://narimasu-chintai.net/jcfiles/file/85467009225.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=write+a+narrative+paragraph+about+the+history+of+a+businessPDF 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_off0000f1b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1B3 11004 bytes
SHA-256: 5c35ac01b667d6c72a73a6cc34d3457a333082f48802548efa0ebc79aae5bf85
font_01_sfnt_off00010b05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B05 17468 bytes
SHA-256: 28aa01fa5d187845ab7d53d46e7821dd1a3533277ba5321a5483c378ee02c4bd
font_02_sfnt_off000137e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137E4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1