Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad788c5a4baaad4e…

MALICIOUS

PDF

98.8 KB Created: 2021-06-28 13:19:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 27863c791ee0316e75db33b0fe76aa50 SHA-1: 3f3cf0d9ad92a43cae0c438fdffe8196622805e2 SHA-256: ad788c5a4baaad4e903419239e7a0fa4242d1d5259c86b839d21b682be884ad9
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to websites that appear to be compromised CMS uploads, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, with the PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supporting the link farm nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160811e16bce77---53777616826.pdf In PDF document text
    • http://ledson.ru/upload_picture/82618279012.pdfIn PDF document text
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/6a173d5c8d985601bfd889aefc1761a5/kirevawajowanewirize.pdfIn PDF document text
    • http://the100voicesofgospel.de/fichiers/newsletter/file/58787562191.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/28446cff41684beb85603ce991e03a98/92929571595.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/zelawejirofi.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/f8c3adba544d2f5e9591dfda4dc4abdf/74087384796.pdfIn PDF document text
    • https://menu2uplus.com/images/file/45622476322.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3bd6a05215---7310073892.pdfIn PDF document text
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3c814bdd86---kumubozipakosaze.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160728e93705c7---xitejugetumevitowalotimu.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/160770c45bac57---rizojimixuvo.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/b4ec55a7c44792ebf4664eae2816d0f3/76316836287.pdfIn PDF document text
    • http://aldo-ins.com/userfiles/file/zifudutoteba.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/2ff5ec7d26f71fcc08b3682c12827c0c/bopituvafanedotewuwidaf.pdfIn PDF document text
    • https://iominneapolis.com/wp-content/plugins/super-forms/uploads/php/files/6691d3a898a2cb8f981764a11792632e/94359561404.pdfIn PDF document text
    • http://logistra.fr/ressource/site-image/files/65416888742.pdfIn PDF document text
    • http://k1a.ru/images/files/file/3585318171.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1609d1b81efb7a---14645633434.pdfIn PDF document text
    • http://www.monts.sk/upload_images/file/sujikewekajujonadobo.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077efec7a998---fewakonitefifekulizu.pdfIn PDF document text
    • http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a30e84beed2---16298284290.pdfIn PDF document text
    • http://ya-ke.cn/admin/upload/wofavuxowatimu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=wrong+turn+x+the+final+chapter+full+moviePDF 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_off00011d88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D88 17636 bytes
SHA-256: 4d8c48e2ef9227221437c6789fe41f6b16bf016b46caec3f34a88312974ea5db
font_01_sfnt_off00014c12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C12 11020 bytes
SHA-256: af06fa741031d1e7ebf487420cb320b73885631ebd0877b5193d43eae19c52e9
font_02_sfnt_off00016590.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16590 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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