Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb10f2e4fbb0e0fa…

MALICIOUS

PDF

99.2 KB Created: 2021-07-08 05:51:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 1b8f0830e09a2a7ead38d885fd2da9ce SHA-1: 7260f77c4c5ab34d66a9b2e975ba35c0164aa227 SHA-256: bb10f2e4fbb0e0fabd3d97dea19d076b43160482b1c862c6a9cf1519cb31a147
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are consistent with a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9872

Heuristics 6

  • 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 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://inwebjor.ru/uplcv?utm_term=dull+ache+in+right+testicle PDF link annotation
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a272d758259---soxatenilexakomejokibo.pdfIn PDF document text
    • http://maility.pl/_ADRESuserfiles/file/40901684377.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079f38428da1---wukobituruguwuguj.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/5e779e3ad243cabd53c13977cc172d7a/33596877429.pdfIn PDF document text
    • http://jgbt.us/pds/userfiles/files/kokenumumopanegotege.pdfIn PDF document text
    • https://www.sehersirin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ab03ca265c---logaredamexi.pdfIn PDF document text
    • http://rajskiewakacje.pl/userfiles/file/34042285171.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d0dd877153---vofojumurexuxizesejixifej.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/b63d42788305fc6db247d5abffb23235/vinanoxamuki.pdfIn PDF document text
    • https://bancodevida.com/bancodevida/admin/images/image/file/xefawapubofevivugalo.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/16097c99b22ed3---gawize.pdfIn PDF document text
    • https://carparts-fixture.com/file/file/67367164583.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b64e6f3dcbf---ponutafimefunizobomen.pdfIn PDF document text
    • https://eastmanllc.net/ckfinder/userfiles/files/14432450896.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/akami6is0qho4ef83nvkc0nq5i/muxosomadesutulezowagiz.pdfIn PDF document text
    • http://vds-construct.pl/userfiles/file/77799003430.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/t2sf9shp04hvlfee9tamm94oef/65322827418.pdfIn PDF document text
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ada9fb0e0ce---6622887812.pdfIn PDF document text
    • http://biurod9.pl/public/userfiles/file/wifadonogufopaj.pdfIn PDF document text
    • https://ispartaorganizasyon.com/ckfinder/upload/files/58625297937.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/6510a589b70dad2948ea46cec75254ef/roxidalu.pdfIn PDF document text
    • https://abe-rdc.com/userfiles/file/dunoxavudimatev.pdfIn PDF document text
    • https://islandsvefir.is/wp-content/plugins/super-forms/uploads/php/files/vt1df0sh23slv6mcqbs43kiiab/jidijemotila.pdfIn PDF document text
    • http://apexnepaltravel.com/userfiles/file/60595025929.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_off000109a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109A3 18812 bytes
SHA-256: 446e18996a475c46e088bf6beb8932aea82bcc99127091986d17fa6c28b2db63
font_01_sfnt_off00013988.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13988 16144 bytes
SHA-256: fcca37035df06e555c2991ff65faa0e8497ca6423bee408ebc46b3aef925b516
font_02_sfnt_off00014f08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F08 10488 bytes
SHA-256: 44b322187248b192936cb22a2cbbb34c5aac06ae5092bc6b1b43b79c4d4c0b30
font_03_sfnt_off000166d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x166D7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.