Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbb7ee27742164c0…

MALICIOUS

PDF

86.0 KB Created: 2021-08-17 05:00:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: a6b547038cb6e674a361b6823f555c9c SHA-1: 01f3c34429e7eb29d173191f13986d1ab7090dc4 SHA-256: bbb7ee27742164c07bc85be7b86b56c97abd8f58c899ec880ad213f0a9579fe5
156 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, indicating a high likelihood of malicious intent. It contains a link farm hosted on compromised CMS uploads, specifically targeting WordPress sites, which is a common tactic for distributing malware. The presence of a UTM term redirector in one of the URLs suggests an attempt to track user engagement with the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • 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://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16097d43897905---12893929010.pdf In PDF document text
    • http://letresorellebio.it/userfiles/files/sakuke.pdfIn PDF document text
    • http://www.aluvascientific.com/UserFiles/file/mapuwa.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16104caf90b924---57103858987.pdfIn PDF document text
    • https://promise-land.com/upload/file/dagumugokemixasadivij.pdfIn PDF document text
    • https://dursunguney.com/userfiles/files/nugedexivifuzapinifidudi.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3eeb7cf303---51980247499.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609d53c361f06---logivekukutoxanarunuwi.pdfIn PDF document text
    • https://abhimaninteriors.com/ckfinder/userfiles/files/burawiwobagonig.pdfIn PDF document text
    • http://vertracapital.com/uploads/files/33904062569.pdfIn PDF document text
    • http://giovanniseneca.eu/userfiles/files/79937477424.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/hh4n2shhoam16p95qi6stegr25/29393828526.pdfIn PDF document text
    • http://dichvu12h.net/userfiles/file/85515231682.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dfd7132a43---gisuxibukegej.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/b2e580d656fdf62c77547181048fc17b/62848701207.pdfIn PDF document text
    • http://bukharasuwanee.com/sites/default/files/file/womezutizafafafasexumuxun.pdfIn PDF document text
    • http://eortak.com/img/fck_temp/file/woxasufikedezatet.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/160da384043623---95742886201.pdfIn PDF document text
    • http://www.moyekolodin.com/files/petitumidazutuf.pdfIn PDF document text
    • http://fullcolorspandoeken.nl/userfiles/file/67013865538.pdfIn PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/e6d8ea9e58fd28b17863c43caeb01e25/74222344969.pdfIn PDF document text
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/bd0e40a29c302c6c7663cc16b3a16210/ketilomigedutudigaboroneb.pdfIn PDF document text
    • https://psg66.ru/admin/ckfinder/userfiles/files/34029221276.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=windows+10+pro+activation+key+microsoft+storePDF 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_off0000eb6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB6D 11260 bytes
SHA-256: 64b068d7689cf2170fb743e53f257a1a17dd8ca8b17c2e334a1fb566d86c8fbb
font_01_sfnt_off000105ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105FF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011e11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E11 16944 bytes
SHA-256: 56e03d0f6d5da36080065a49c039967ccfcb5dfa7ee71e922818290aeb37a9ff

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