Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d88898fb7f4c59e…

MALICIOUS

PDF

69.5 KB Created: 2021-09-06 17:09:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 5a4d8b2490cf4157a9486e3d31da070a SHA-1: d4c97b410263eb9f2096cd9adbe09abf05cafa93 SHA-256: 0d88898fb7f4c59e4e09f6835245d6521b737b3bfff96188451cfe9c017449a8
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF employs an image-based lure, a common tactic for phishing or malware distribution. It contains numerous external links, many pointing to compromised CMS uploads or disposable hosting, suggesting an attempt to redirect users to malicious sites. While no scripts were directly extracted, the PDF structure and heuristic firings strongly indicate it's designed to exploit user interaction, likely leading to a secondary download or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 69 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://oniceh.ru/uplcv?utm_term=refugees+in+south+africa+pdf PDF link annotation
    • https://audreyheselmans.com/_files/file/jupawota.pdfIn PDF document text
    • http://all-pass.com/folder/editor/file/musidanepavir.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16082cd30b3d5b---72634126174.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/90ffd238fcebba07f85985ace6eada6b/fetis.pdfIn PDF document text
    • https://karapinarinsaat.net/userfiles/upload/file/51625688190.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aabacee8409---61433522199.pdfIn PDF document text
    • http://urbanconstructions.org/images/uploadedimages/file/dabogemovu.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b62f773b09b---55802135117.pdfIn PDF document text
    • http://hyunbulsa.org/~ewedd2/userfiles/file/62450619390.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/bo2iggstiucc8b7oour8f2fh25/fixejobujit.pdfIn PDF document text
    • http://coutleelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fejoladapogelamovigibi.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/1610cd84a3be76---35953331317.pdfIn PDF document text
    • http://webinaris.biz/ckfinder/userfiles/publics/files/59775296644.pdfIn PDF document text
    • http://sva-jeanroze.com/xmedia/file/45061688200.pdfIn PDF document text
    • http://raykingcarroll66.com/clients/2/29/292092747e06e0ab09130fa737b110c0/File/36164101277.pdfIn PDF document text
    • http://francescofesta.it/userfiles/files/14496162803.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160ab7694a2506---35853330362.pdfIn PDF document text
    • http://musorcentrum.hu/files/article/file/saxabijadagorebunuwexalus.pdfIn PDF document text
    • https://marljivo.hr/userfiles/file/ditipu.pdfIn PDF document text
    • http://eros-arena-reutlingen.de/eros/userfiles/file/bokiloxusekesekimejulo.pdfIn PDF document text
    • https://www.letspassdriving.co.uk/wp-content/plugins/super-forms/uploads/php/files/k77t2bfjlt4b24ra2eq3dedsdn/19292652736.pdfIn PDF document text
    • https://efsanepin.com/calisma2/files/uploads/rofadimilemivelajujoxurux.pdfIn PDF document text
    • https://questyme.ca/userfiles/file/51073733255.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160f11c42255e5---18154173721.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_off0000b4de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4DE 13652 bytes
SHA-256: 7039170d5d12fd8d2371e1cef3bb36c0386554e02b605e602ca1cde89263ad11
font_01_sfnt_off0000d6b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6B9 11000 bytes
SHA-256: 304863fe3391206941166f1981143c73d2f40382099f9ef6214663722a7b10f8
font_02_sfnt_off0000f00b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF00B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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