Malicious PDF — malware analysis report

Static analysis result for SHA-256 9449af8d44318877…

MALICIOUS

PDF

81.3 KB Created: 2021-08-30 19:42:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: b634c886525226599010394758a04e97 SHA-1: 20a70dafae1c4dde6037bf127429200ed16177fe SHA-256: 9449af8d44318877841a69b68018d6ac7ad8d608b9df2f6a14f00b754d63c76a
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to compromised WordPress sites. The ML classifier and ClamAV both flagged this file as malicious, indicating a phishing or trojan distribution attempt. The primary function appears to be redirecting users to potentially malicious content hosted on various domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://concertwristband.com/resimler/files/72237321154.pdf In PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/8757721b7ca56ae51a15eb1a6fa2156f/xulajog.pdfIn PDF document text
    • http://veganogle.es/uploads/ckfinder/files/pumikawon.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607ecf7f4892b---fapigikowejanosufopisug.pdfIn PDF document text
    • https://demircanticaret.com/userfiles/file/12887549195.pdfIn PDF document text
    • http://firewheels.pe/userfiles/file/37107700401.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf57a56bf0---nesovejutige.pdfIn PDF document text
    • https://c4ir.ae/wp-content/plugins/super-forms/uploads/php/files/o9jq1tpfqohe2e17bm3pdi6ml1/figotoxim.pdfIn PDF document text
    • http://juentai.com/userfiles/files/93150648212.pdfIn PDF document text
    • https://iwnta.com/userfiles/file/43775636229.pdfIn PDF document text
    • http://fincasotilloviejo.es/files/sotillo/_repo/file/49205325385.pdfIn PDF document text
    • http://saltokisport.com/uploads/files/zetafesotesaz.pdfIn PDF document text
    • http://school15-tyumen.ru/f/nolamiwezibikavavog.pdfIn PDF document text
    • https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/tsbn8ncurij73fjd0ho8hhepvs/54998368077.pdfIn PDF document text
    • http://mayinmaunhat.com/upload/files/43024943038.pdfIn PDF document text
    • https://jagamimpi.net/contents//files/zotuz.pdfIn PDF document text
    • http://juniorsmagazine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ed51367fa2---6802012816.pdfIn PDF document text
    • http://lncxjzxxw.com/upload_fck/file/2021-7-8/20210708124721230908.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/cb76b2cd731c7e4f945fc1e03464d805/9664978021.pdfIn PDF document text
    • https://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607d463e7d603---50228481666.pdfIn PDF document text
    • http://fatfailogistics.com/fckeditor/files/file/9158671615.pdfIn PDF document text
    • http://anandtouristcorporation.com/uploads/46279563104.pdfIn PDF document text
    • https://samyenngochoang.com/wp-content/plugins/super-forms/uploads/php/files/g3mibf063sav5p9qa888pi20r2/wapiwabizujadanetasaf.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/eb81f6da7570b89040c56bffc1718be3/21973207761.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609293dc9400d---91135491921.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=network+operating+system+pptPDF 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_off0000d99f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD99F 10816 bytes
SHA-256: d119f2a6e2a9dcec982e8c0d30cd82bedec0363b8a9a4458168240f1dd22273b
font_01_sfnt_off0000f2ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2AB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010abd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ABD 17600 bytes
SHA-256: e6eacdd5ef1496b936963c51a9a7d0dc34e31ec567b3dd325ef10545fe0663b5