Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d3c88f3e1ca11d0…

MALICIOUS

PDF

81.9 KB Created: 2021-10-12 00:43:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-14
MD5: 960dc79f1d667c8df75b514bde76c7be SHA-1: aea4bbe0052c19da67afc60fd3c8f938d42e8a7b SHA-256: 0d3c88f3e1ca11d0ba4ce2a928ff0597c71f4da48588d084b9b53f569bcb1329
96 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 5

  • 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://ruishikaishi.com/upload/content/files/2021/10/20211011141621.pdf In PDF document text
    • http://bright-inter.com/file_media/file_image/file/vigugajipomifukafezomenu.pdfIn PDF document text
    • http://netcentricnj.com/ckfinder/userfiles/files/vitadopugeviji.pdfIn PDF document text
    • http://dienlanhhuubinh.com/upload/files/86575424577.pdfIn PDF document text
    • https://belretail.by/ckfinder/userfiles/files/18898073256.pdfIn PDF document text
    • https://ice-group.pl/userfiles/file/29770932893.pdfIn PDF document text
    • https://dichvuhappyhouse.com/upload/files/86817728080.pdfIn PDF document text
    • http://caphegiabao.com/upload/fck/file/damerisoduwifig.pdfIn PDF document text
    • https://huangs.tw/uploads/files/202110010445464169.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138ad9b7c6a9---74443513503.pdfIn PDF document text
    • https://reclamesticker.nl/images/uploads/file/In PDF document text
    • http://k1a.ru/images/files/file/54978011393.pdfIn PDF document text
    • http://mlead.net/images/e/file/34095566416.pdfIn PDF document text
    • http://www.c-l-r-p.com/admin/ckfinder/userfiles/files/38805874409.pdfIn PDF document text
    • http://falconltd.pl/cache/file/94118284090.pdfIn PDF document text
    • https://jdsliquorlocker.com/nbloom/fckuploads/file/nuxubanixuja.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/17108343e85a296aecd7a1fb103cb97a/valigabototiri.pdfIn PDF document text
    • https://pragatitic.org/ckfinder/userfiles/files/84850582454.pdfIn PDF document text
    • http://motorlustor.net/userfiles/file/gutemobegip.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16164ab09d00ee---64812838563.pdfIn PDF document text
    • https://mma-montessori.com/admin/ckfinder/userfiles/files/6757760882.pdfIn PDF document text
    • https://ahirealty.in/admin/userfiles/files/kubajurulifunevogu.pdfIn PDF document text
    • https://www.tzounakos-insurance.gr/ckfinder/userfiles/files/1788446329.pdfIn PDF document text
    • http://noithattamphuong.com/upload/files/9063618237.pdfIn PDF document text
    • http://cu-mbc.com/ckfinder/userfiles/files/wojekoroxojenixemajujedum.pdfIn PDF document text
    • http://feedproxy.google.com/~r/Xvkpad/~3/6Zflnl449io/uplcv?utm_term=bls+cpr+exam+answersPDF 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_off0000db67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB67 18024 bytes
SHA-256: dffc38fcab85d644287556d041184b88b39dd11ffe4b1f4749f4443a62db213b
font_01_sfnt_off00010a00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A00 10468 bytes
SHA-256: b02dc0c4b0564bf71a4202f5daad4f03579d7b3e4112d17bba47fba6ac30a685
font_02_sfnt_off000121e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121E3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1