Malicious PDF — malware analysis report

Static analysis result for SHA-256 88b3bfdffab86e51…

MALICIOUS

PDF

73.8 KB Created: 2022-04-11 18:46:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-04-02
MD5: 15f73ba5a6599d7637d00d2ab6da5ff9 SHA-1: 6cca11e92d091762bdb4f693ce4d84ac5b8884fd SHA-256: 88b3bfdffab86e514a9c81a6fd8dbe77ccf58341e05198f068e4acad3aff1b8b
266 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • Clickable PDF combines external action with parser-evasion structure high PDF_ACTION_PARSER_EVASION
    PDF has an external clickable URI together with object graph or xref structures that make parsers disagree, such as divergent duplicate objects, parser divergence, or xref offset mismatch. That combination is stronger than a plain link: the document is both an outward-action carrier and a parser-confusion/evasion sample.
  • 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://lazav.co.za/YmrXLWy8?keyword=adele%20sheet%20music%20pdf%20free PDF link annotation
    • https://bizotimugir.weebly.com/uploads/1/3/1/1/131164076/b3dc50.pdfIn PDF document text
    • https://sahyadrisevasanstha.in/userfiles/file/dofelube.pdfIn PDF document text
    • https://dewalt-naradi.cz/media/upload/editor/file/bulet.pdfIn PDF document text
    • https://duzetokip.weebly.com/uploads/1/3/4/4/134404829/4d4cf1a95189.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/e38ee559979cd3b9adfd455252a27a56/fufefetuvosiniwutafu.pdfIn PDF document text
    • https://sawuzirerepobod.weebly.com/uploads/1/3/4/0/134040369/nafisalatiwe.pdfIn PDF document text
    • http://alrehabourhome.com/userfiles/files/30534189088.pdfIn PDF document text
    • http://zhuoxinlaw.com/userfiles/file/20220302041511_629705582.pdfIn PDF document text
    • http://www.superprzygoda.pl/galeria/files/19945922152.pdfIn PDF document text
    • https://vajizekof.weebly.com/uploads/1/3/4/5/134594154/6875557.pdfIn PDF document text
    • https://tivepikilusu.weebly.com/uploads/1/3/4/7/134759048/212044.pdfIn PDF document text
    • https://vewenikeluw.weebly.com/uploads/1/3/0/7/130739128/lexelozeduwi-gokawawekamuz.pdfIn PDF document text
    • https://jedapozopimu.weebly.com/uploads/1/3/4/6/134614290/6515203.pdfIn PDF document text
    • https://bakijunida.weebly.com/uploads/1/3/2/6/132695635/dipipaperunodem.pdfIn PDF document text
    • https://tuwagufo.weebly.com/uploads/1/3/3/9/133999840/newipuwup_wemezuvasunoz.pdfIn PDF document text
    • http://rbtyutj01.com/userfiles/files/70656099937.pdfIn PDF document text
    • http://immobilieninvestors.net/userfiles/file/kalibunegine.pdfIn PDF document text
    • http://ambulatorioveterinariosantanna.eu/userfiles/files/xudali.pdfIn PDF document text
    • https://wigadanoj.weebly.com/uploads/1/3/4/4/134404864/1340723.pdfIn PDF document text
    • https://jutasosunefobe.weebly.com/uploads/1/3/4/0/134012390/0f7df67a770.pdfIn PDF document text
    • https://xexetuva.weebly.com/uploads/1/3/4/5/134599875/3322253.pdfIn PDF document text
    • https://molesomux.weebly.com/uploads/1/3/2/6/132681378/7e44445f8d1730b.pdfIn PDF document text
    • https://xefapakofaguwa.weebly.com/uploads/1/3/1/1/131164324/5059445.pdfIn PDF document text
    • https://fibepuvugodozem.weebly.com/uploads/1/4/1/2/141255561/9845369.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 extracted file (font_00_sfnt_off0000bb5c.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0000bb5c.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bb5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB5C 17876 bytes
SHA-256: 88bfd67b1d8ade489e29759d31bffdc2aa02f718571b54c9c2d9050a1fb587c1
font_01_sfnt_off0000ea11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA11 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010228.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10228 10580 bytes
SHA-256: 2c56475944eb50565f98835b396f462fbbac55214faea41f9699e01f730e1685