Malicious PDF — malware analysis report

Static analysis result for SHA-256 8abf0d394750fb81…

MALICIOUS

PDF

93.6 KB Created: 2021-07-15 13:15:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 6d71f9d31564cd1d376db696e09bebc2 SHA-1: 6a7bf25540c5cd64f0de00a07528f97c15dda48c SHA-256: 8abf0d394750fb81efc867eac1abb6321b868e983aebd53f44d44d90a66f0bd4
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, and the document body was unreadable, but the heuristic firings and URL analysis are sufficient to determine the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://philabc.ru/uplcv?utm_term=geothermal+energy+in+puga+valley+and+parvati+valley+are+stock+resources PDF link annotation
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/160cd23666d8ad---dofejuwu.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160826f1b112d5---59319735942.pdfIn PDF document text
    • https://jxloanchien.com/style/postimage/file/16085025247.pdfIn PDF document text
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/006c9b663185a7406a409e2b3ee6b36f/82211537592.pdfIn PDF document text
    • https://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/taq122j1elt1rbrmu7ft4obf64/tiwiz.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/9cc7fb6a1e4b7f2b1d5d5d7c4ecd616d/44081229953.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ffb479281c---pulerutu.pdfIn PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/2f468738b4b198b28382954c8c42ff5a/52127194836.pdfIn PDF document text
    • https://repare-ton-smartphone.com/userfiles/file/82263896903.pdfIn PDF document text
    • https://scapetime.net/images/website/user/files/18671347211.pdfIn PDF document text
    • http://scales-center.com/shop/fck_file/file/52671045359.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/lujevizesotogin.pdfIn PDF document text
    • http://hayatteknoloji.com/webimage/file/bibatezuvixanup.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e3168a1f8c---34165142656.pdfIn PDF document text
    • https://cortemadera.com/wysiwygfiles/file/mofenosuze.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609be3c939ebf---novusuzivaximuf.pdfIn PDF document text
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bd90ae3275---90464044917.pdfIn PDF document text
    • http://digemnd.com/UserFiles/file/29444116520.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a01693ab0db---93674530080.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5715bd120---zivew.pdfIn PDF document text
    • http://www.annaleehuber.com/content_files/file/mamoxafupepurubemaf.pdfIn PDF document text
    • https://roweryelectra.eu/app/webroot/uploads/file/16202702521957.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_off00010795.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10795 11372 bytes
SHA-256: 4d2ed77117ba8b0302657f9bc2c8926087bd24c081953e861a4f594ebc56bb7a
font_01_sfnt_off00012213.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12213 16964 bytes
SHA-256: 59ddfa3674ab34c3f81d75e5b8685f29bf2d269f99c6aebd9fa780a2d9985b30
font_02_sfnt_off00014e60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E60 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.