Malicious PDF — malware analysis report

Static analysis result for SHA-256 f99157a460a94799…

MALICIOUS

PDF

405.4 KB Created: 2022-02-11 08:23:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-13
MD5: 23a83de2339b4c5d27714bff33d4f044 SHA-1: aa62224f69f9e4f5a30e830c88e04e94ccaf42c9 SHA-256: f99157a460a94799d95100812f3117eff40791bf2dddb80b96b8ccb3ce463639
174 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.8919

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
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.
  • SEO-redirector lure link (multi-word utm_term) low PDF_SEO_UTM_REDIRECTOR_LINK
    PDF contains a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the search-keyword gateway used by the 'free document download' phishing family. Surfaced as an IOC; on its own this is a low-confidence signal.
  • 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://yubit.co.za/XSRYdR1H?utm_term=gmail+app++windows+10 PDF link annotation
    • https://elger.cz/fckphotos/file/mepibapodamopiwajixolajew.pdfIn PDF document text
    • http://myxroad.com/upload/userfiles/file///23476570547.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/5615bbb1a9638a9884be82c6507f5b3e/67732586816.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/0gpk3bvuf2akssgtimp0b200v7/kefatepixajawuvem.pdfIn PDF document text
    • https://strechybenesov.cz/content/11742805497.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/63317284272.pdfIn PDF document text
    • http://denda.co.kr/ckfinder/userfiles/files/66221354696.pdfIn PDF document text
    • https://tectrongim.com/uploads/file/divaweferezu.pdfIn PDF document text
    • http://gamulchi.org/userfiles/file/15379770754.pdfIn PDF document text
    • http://hnsunnyfood.com/d/files/takiwevudogokuvoxetalates.pdfIn PDF document text
    • http://srihemkuntschoolint.com/slbdavbatala/userfiles/file/1033520325.pdfIn PDF document text
    • http://xinshifm.com/userfiles/file/10582888907.pdfIn PDF document text
    • https://turismopontevedra.com/ckfinder/userfiles/files/devuzawosuzugapujowepinus.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/161787e0048646---18854898878.pdfIn PDF document text
    • https://godahoian.com/app/webroot/upload/files/9709430179.pdfIn PDF document text
    • http://bycongroup.com/UserFiles/file/xigotofevizubuxo.pdfIn PDF document text
    • http://www.donkersmontage.nl/kcfinder/upload/files/5545632181.pdfIn PDF document text
    • http://fanti-fitness.pl/uploads/assets/file/wefobawerinisazu.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_off0005e70c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E70C 10520 bytes
SHA-256: 9f0d09f8d639fe1601179d093777480288d91cfcfa91495775c0f19f0c9ccf97
font_01_sfnt_off0005fefe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FEFE 18632 bytes
SHA-256: 3703dabc9110198dfc78a4ef353bab92464a0de3af87aba0674f461cd09faaca
font_02_sfnt_off0006300f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6300F 16560 bytes
SHA-256: 924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9

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