Malicious PDF — malware analysis report

Static analysis result for SHA-256 75a2f7d48a8509ad…

MALICIOUS

PDF

81.5 KB Created: 2021-09-07 02:12:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 65dd8ccfcc6689ff1973b4f9e436a6a6 SHA-1: 76e393a60301b3fb4fabd6d44fdbab5c045dfa87 SHA-256: 75a2f7d48a8509ad6c794cc904078c38f431b595404dba4f6f11c1272b5bca18
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains a link farm pointing to numerous distinct hosts, many of which are compromised CMS uploads, suggesting an attempt to distribute malicious content or phish users. No scripts were extracted, but the structure and URL patterns strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 https://floresdeserrezuela.com/aym_image/files/19471770580.pdf In PDF document text
    • https://lepjunk12.hu/uploads/files/52952612151.pdfIn PDF document text
    • http://ahsaipu.com/v15/Upload/file/202156349507920.pdfIn PDF document text
    • https://betenrealestate.com/sites/default/files/file/84468269272.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/86267483659.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607965a1b1548---11786210033.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/437b0afd82694bc462ce0bf330d14c6e/12148302454.pdfIn PDF document text
    • https://jf-orvalho.pt/userfiles/file/4703332651.pdfIn PDF document text
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/d9b6286cc09058a6877fc1625fb70e41/13677710990.pdfIn PDF document text
    • http://szermgrt.hu/uploads/ckfinder/userfiles/files/8514450901.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160c3e1f4a608b---zamefojuporikokid.pdfIn PDF document text
    • https://fluffy-chins.com/images/file/jemofazizuruku.pdfIn PDF document text
    • https://lengthening-sldf.com/userfiles/file/75397505841.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/94921a2e5996a68c93d12982e4fff85a/domotol.pdfIn PDF document text
    • https://www.southdownscellars.co.uk/ckfinder/userfiles/files/takinufipedejutatapaza.pdfIn PDF document text
    • https://aucordechasse.fr/vosImages/46574009771.pdfIn PDF document text
    • http://carriewoodfamily.com/clients/5/5b/5b9f2fb360c4065436fb7fe1267c3612/File/96373392054.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d3a9a2b179---modogipusolidulivalimax.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/v6jkrl3rpjutmmi1es7coprmpt/lenudituvixoweko.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/hl35t8amemcefngkdkhtrgak5r/21460940362.pdfIn PDF document text
    • http://eshop-kocicinadeje.cz/files/file/12415140852.pdfIn PDF document text
    • http://cedarvalekansas.com/clients/875954/File/rimun.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=world+englishes+pdfPDF link annotation
    • http://s292376414.onlinehome.fr/datas/imgmail/file/58095427273.pdfIn PDF document text
    • 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_off0000d92b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD92B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f142.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF142 10508 bytes
SHA-256: 8daf572f4befdc7d048f7c98cddbcb0ad06f14e0581c85c03ab96e67f9410d9e
font_02_sfnt_off000108c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108C5 18296 bytes
SHA-256: 929e8f91445095d4a13edab12e8b6675024039aaed21b8964653081a483e97f4

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