Malicious PDF — malware analysis report

Static analysis result for SHA-256 88965090ec11bf8f…

MALICIOUS

PDF

91.0 KB Created: 2021-08-12 18:51:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: e56eeb47ad07ccd98ba4409515d67378 SHA-1: 508bcbe53ac5c4642531d37918f5a7815158ef35 SHA-256: 88965090ec11bf8f4bcee59d6b3f5c75d2cc113d761d88238efc01fb0ad79299
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable domains, suggesting a link farm or SEO poisoning tactic. The primary function appears to be directing users to potentially harmful external content rather than delivering a direct exploit within the PDF itself.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://iwnta.com/userfiles/file/mowige.pdf In PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160e0479c94ec1---bolixakamamujulifelopud.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/7e12a743b8f18bf9c6a984d0b6d44296/fadenuvalax.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/c2bb24885ac337517d3d799671a70777/digijofizalol.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/mr9l772408krn40eklgf6qos36/momiwegoxebinew.pdfIn PDF document text
    • http://zovsh.com/Uploadfiles/files/zudakekebubukasujudabela.pdfIn PDF document text
    • http://royalleasingny.com/admin/images/file/modasedosevamigezopaz.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/q2b8lnt0j189p6mfq2i2gch5b3/seduxiguwijivumuxifid.pdfIn PDF document text
    • http://futurepoolandspa.com/ckfinder/userfiles/files/85098801806.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/ce9969d81bfb1010ac1108b6abfe2f48/nosedaxetebab.pdfIn PDF document text
    • https://felix-schulze.biz/wp-content/plugins/super-forms/uploads/php/files/t25om79fmtipvu6uhfukcjouih/2149876211.pdfIn PDF document text
    • http://www.melloecastro.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607abed4bcc91---88255784430.pdfIn PDF document text
    • http://misspacificus.com/clients/873634/File/vitevesenudaretuxezoliluv.pdfIn PDF document text
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088d39632cb7---89855205868.pdfIn PDF document text
    • http://nuocmambason.com/upload/fckimagesfile/f00cf949a3bcda21824a13500019d7ba.pdfIn PDF document text
    • http://kpotplace.com/uploads/files/78160616416.pdfIn PDF document text
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/593554216f53a1399abfb0bf89f94472/sizazolotuluguzel.pdfIn PDF document text
    • http://utopiasacramento.org/clients/0/07/071cdeedc048305be324eb10ab8031d4/File/15566425838.pdfIn PDF document text
    • https://rowadalbyt.com/userfiles/files/62806076083.pdfIn PDF document text
    • http://beerskiboot.de/img/upload/file/3155688635.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610b790fe3034---69190257062.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/160ba256ceac5d---84391317544.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/8evfueg3p1nsrfpquj085hscal/bitijavukuwabibem.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=kitab+al+mughni+pdfPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_007_off0001298e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1298E 17548 bytes
SHA-256: 31dc533ac1091899cc84b6e10637e08cbfbb3e936537f27c2b23e97ccc8c8323
font_00_sfnt_off0000e4c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4C4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fcd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCD6 17180 bytes
SHA-256: 9a76ee1fa47367843cf62a1b47a6f6c00c66ff976d77a13eb7ddc007aa81fa3b
font_03_sfnt_off0001440d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1440D 10656 bytes
SHA-256: fcc872a5543c56fcc3fa8fc52e3226b12e45fd0bdcd3c9fbda1338defee44840

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