Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c2c47a77527fed8…

MALICIOUS

PDF

79.8 KB Created: 2021-09-03 02:14:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 21fadaf469990f030eef42515125de7d SHA-1: a4c62242d6677a71a1f7cdab7396fef59697484f SHA-256: 7c2c47a77527fed8c1134eb50a3cb8a74a5ae1fd0232e0d0816476c7319d76d7
156 Risk Score

Malware Insights

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

The file is identified as malicious by multiple heuristics and a machine learning classifier. It contains numerous links, many of which point to compromised WordPress upload directories, indicating a link farm designed to host malicious content. The presence of these links suggests the document's primary purpose is to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608054553cd3f---12870599216.pdf In PDF document text
    • http://stepasidemedical.com/images/uploads/file/73746150158.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608ee9b0034ae---26871398089.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/4cb9cb5c1cd82b45b45d0cb2b8382e42/lagenupegesofefo.pdfIn PDF document text
    • https://mayurherbal.com/userfiles/file/96677746384.pdfIn PDF document text
    • http://martonelektro.hu/files/file/vevabaxikerizuvozezib.pdfIn PDF document text
    • http://werkkledingverkoop.nl/images/docman/files/85071956023.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/512bbc1fefe9c31ceb12bf304ace4905/20786486864.pdfIn PDF document text
    • http://geoodwierty.pl/files/file/2014234935.pdfIn PDF document text
    • http://monkey-do.net/userfiles/file/topeduxazu.pdfIn PDF document text
    • http://smclassof57.org/clients/34860/File/lipud.pdfIn PDF document text
    • http://18554080.com/userfiles/file/lufifi.pdfIn PDF document text
    • http://artstudiodesign.it/userfiles/files/wemot.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/678bdd8f6d4b0019ae9a7143ac0ad57c/pixorefis.pdfIn PDF document text
    • http://logo4you.dk/userfiles/file/87050360630.pdfIn PDF document text
    • https://ctsgroups.asia/images/file/dipaxunimud.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16085aaaae53b2---narabonozufogumopez.pdfIn PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/160d7b571d219b---90706962458.pdfIn PDF document text
    • http://isisthailand.org/file_media/file_image/file/87049931786.pdfIn PDF document text
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a678d389928---96709781907.pdfIn PDF document text
    • http://hayatteknoloji.com/webimage/file/24467321724.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=continental+drift+and+seafloor+spreading+pdfPDF 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_off0000d4d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4D4 17104 bytes
SHA-256: 455ee959fece6a155233c86ee6993e745cb4e74722025f175c2baf8ef92214bd
font_01_sfnt_off000100a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100A6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000118bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118BD 10704 bytes
SHA-256: 806a6a42ddfb6f003e2a3c4b321beee71a1a7effc9147af3a587a65ee388f5e5