Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee972ae68898e60f…

MALICIOUS

PDF

86.9 KB Created: 2021-09-01 03:54:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 8f37ef19322c628e47b04037228c519c SHA-1: c742eb1b9f62c50e66f78fee7ffb5d35d8426658 SHA-256: ee972ae68898e60fd75c545e4ee0985fe1d066c9e580794750ae9243178c555a
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as a link farm, with many URLs pointing to compromised CMS uploads and disposable hosting. The ML classifier and ClamAV also identified it as malicious, specifically as a phishing trojan. The document's structure and embedded links suggest an attempt to redirect users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/bpre7r7nlc014vp6git2muud12/57762834522.pdf In PDF document text
    • https://profipreklady.cz/www/ckfinder/userfiles/files/60030839546.pdfIn PDF document text
    • http://gibisch.info/files/files/zuzazonomegufimevi.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d416ac5bec---76736218202.pdfIn PDF document text
    • http://take114.kr/FileData/ckfinder/files/20210731_20E95584BC2A5A4B.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d4f975ng6cr51p454p5uhpkj30/97498605096.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/1608a683cef635---sefakelogasu.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/9f79af21bad00df4d674a47168cfd534/55294052984.pdfIn PDF document text
    • http://tort-art.ru/userfiles/file/91158012435.pdfIn PDF document text
    • https://samavetah.com/ckfinder/userfiles/files/nupexuvisebavizotofo.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/793erhdjbj7unqljpb6nj089k2/90126542916.pdfIn PDF document text
    • http://gongotour.com/FileData/ckfinder/files/20210811_AB2B38EB61614146.pdfIn PDF document text
    • http://canxetaidientu.com/images/file/buwevogubido.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/011751225265.pdfIn PDF document text
    • http://ozdesignhouse.com/app/webroot/uploads/files/15253690467.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160da194044bf1---81582078328.pdfIn PDF document text
    • http://pereplanirovkaoblast.ru/pict/file/41169139548.pdfIn PDF document text
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073c6a629f9c---rovuzanudawuwurutal.pdfIn PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/kbqeaa2a1n16k5ccntlkc63993/wivamobomujozixanimelera.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/30980162952.pdfIn PDF document text
    • http://kovofilm.cz/userfiles/file/8132565368.pdfIn PDF document text
    • http://arci-mp.fr/admin/File/karuxipivivurogepepatebe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=roy+naa+songs+downloadPDF link annotation
    • https://www.unimedbelem.com.br/painel_template/assets/global/plugins/ckfinder/userfilesfiles/48103934396.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d53c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD53C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ed53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED53 10248 bytes
SHA-256: 27775a6294685aae92f8f57c76fbf323c234d4356cd4334c4f8d770e3f2e98fd
font_02_sfnt_off00010450.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10450 16164 bytes
SHA-256: a0f26d9ec2bc0bbc84dfb8c1a224a49f7f70479ac92e21d726acd811d43f3bd1
font_03_sfnt_off000119f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119F1 20284 bytes
SHA-256: 1da76af92a0ba725de5841f45147f5d2f4611fccdd7989ce95d7cebc78d8ecfe

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