Malicious PDF — malware analysis report

Static analysis result for SHA-256 00fb57277833dd4d…

MALICIOUS

PDF

85.0 KB Created: 2021-09-03 16:57:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 96917915cedb75776fc2f95fa67eb550 SHA-1: dca6c60b0c98b2830ff827d3a973cc72b82afbe7 SHA-256: 00fb57277833dd4d30d416fdb9044facd7b67c44e1ead72d032d18fa51c98502
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous external URIs and link farms pointing to compromised WordPress uploads and disposable hosting, suggesting an intent to redirect users to malicious sites. While no scripts were extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9938

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=treasure+island+book+bangla+pdf PDF link annotation
    • https://j26clean.com/upload/files/25826414216.pdfIn PDF document text
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/1d97dcb8ca75d651f6afa311ffac78a8/bogoxofazelotiluzesamidu.pdfIn PDF document text
    • http://reklamavysocina.cz/UserFiles/File/mafakuv.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c9a4c828961---2991111788.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/16085a585abf29---42158570819.pdfIn PDF document text
    • https://kratky.eu/files/file/56550030731.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/a86a91e59208f22767ce623d9d266d70/81669249533.pdfIn PDF document text
    • https://brianhigbielaw.com/UserFiles/file/kutepukegawebeni.pdfIn PDF document text
    • http://atomleasing.ru/media/File/10640826620.pdfIn PDF document text
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/bde511e379a1b5569262ca91434dc9cf/18885146524.pdfIn PDF document text
    • http://acril.ru/ufiles/files/83571267803.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/324420d1e8e36c292c5f75aac24806ea/wozerapot.pdfIn PDF document text
    • http://word.mn/uploads/assets/raroliwiwudosu.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160ad87ec636e4---5337866472.pdfIn PDF document text
    • http://portaldo.eu/contenuti/upload/file/34614281510.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160764df173b7d---takavemixajipewinurija.pdfIn PDF document text
    • https://amthanhanhsangchinhhang.vn/upload/files/76040002303.pdfIn PDF document text
    • http://ottotech.center/userfiles/file/16525383806.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/oqcejfjf50sp3390lvb450rvmt/bamigefezif.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-5-4/20210504174708657153.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/28a83227f38bf8c678c6b01a40d6c0ef/57211225248.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/65i7c77ni8qce4pcct24qcc331/kulufaxalijiwugalu.pdfIn PDF document text
    • http://remont-elektro.eu/archiv/file/netusije.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc9f059176---rebewewigoganixofilolop.pdfIn PDF document text
    • http://wongkungfu.ca/clients/f/f5/f5c316b966f29b3192b3e9e3c5714b3c/File/kalud.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_off0000c5af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5AF 21896 bytes
SHA-256: 24292e45f7f36bed5b2eee03b370e2f80f24ce25a7eac65933f5b3d0863b2e1e
font_01_sfnt_off0000fedd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEDD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000116ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116EE 16148 bytes
SHA-256: b17e3c388ca520c70044df51a505a8c8de3d1ca9b2e495c629779bc8d31aca59
font_03_sfnt_off00012c7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C7E 10872 bytes
SHA-256: b32847e2d03a470a235790af6bd741afeae59e37f2cce765d5626c7baae87263

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