Malicious PDF — malware analysis report

Static analysis result for SHA-256 122fbfc34c439063…

MALICIOUS

PDF

95.3 KB Created: 2021-08-16 01:01:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 5b0532e11dc04f5588ddb7b9906a9753 SHA-1: ad130982bd00e56696cb08c7e98231339a5989a4 SHA-256: 122fbfc34c4390635f91177e8d88a14058b1edeb69a0819c6395d515ecb93d86
176 Risk Score

Malware Insights

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

The PDF contains numerous embedded URIs, many of which point to compromised CMS upload storage or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted from this sample, and the document body was unreadable.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://kpotplace.com/uploads/files/77019225576.pdf In PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/mbpouo8l0290l8vs6nnfjg8ov2/22192141236.pdfIn PDF document text
    • https://rotterdampools.com/contents//files/53119471149.pdfIn PDF document text
    • http://alliusie.com/userfiles/file/29983070329.pdfIn PDF document text
    • https://www.cittadelmiele.it/wp-content/plugins/super-forms/uploads/php/files/a89f50a5a16374c5340f52eca6044798/gebitojawodawudutopufazo.pdfIn PDF document text
    • http://tokyoto.pl/UserFiles/file/pegagidodorul.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/03810a3250b04a9bc4bf2c2273a408b0/degawigawitamudabu.pdfIn PDF document text
    • http://evohome.pl/userfiles/file/xuzaxofuvakotato.pdfIn PDF document text
    • https://network-italia.com/file/mogitemetedisatazumok.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/92d6f6666037199bd03958783c4cbf42/38345549997.pdfIn PDF document text
    • https://congchunghadong.com/uploads/files/40475356941.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160f74962275a9---dovakefidol.pdfPDF link annotation
    • https://nikosdimos.gr/userfiles/file/gapogamopuw.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160884a87d5fe4---romufidi.pdfIn PDF document text
    • https://mobile-translator.eu/app/webroot/media/files/revusonivanukabu.pdfIn PDF document text
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d12584e3a8---83578500194.pdfIn PDF document text
    • http://colorfusion.us/admin/images/file/33676116496.pdfIn PDF document text
    • http://dokumsuzgec.com/userfiles/files/94940672512.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/54a6e43d1e6263625d29731cd70520be/87412443619.pdfIn PDF document text
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/b5dc51605f66e09d5d023d903c82a9f7/51988451905.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/gatulisuf.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b69a62495f---zazesu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=backbeat+fit+3100+pairingPDF 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_off00010d55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D55 10952 bytes
SHA-256: 2bfec5bb053201aa54c2f41bb0f7b91b0e03ab37af2c31d07dde112433775df6
font_01_sfnt_off000126c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126C4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013ed6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13ED6 18836 bytes
SHA-256: 9a9a70bd379fa8b9e3de71ddb26af11cffbed198a9c7a5cef43e92ca982c58e5

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