Malicious PDF — malware analysis report

Static analysis result for SHA-256 360d8a8d80336eb1…

MALICIOUS

PDF

85.9 KB Created: 2021-08-16 05:44:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 3a5314f3db63027909107929577b0ac1 SHA-1: d8ab030d8b8614025c9cf3920799a7f05f3e9ec2 SHA-256: 360d8a8d80336eb1151b7fed01b19eaf86c54a1f79d538865f4e75429e7026c1
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised CMS upload storage and disposable hosting, suggesting a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are consistent with a phishing lure.

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 http://togetherwewalkny.org/clients/2/24/2411cc079aa0f0d7fd57f81c6163ecfd/File/rifupetubuladadepupix.pdf In PDF document text
    • http://ccadl.com/files/20210709131032.pdfIn PDF document text
    • https://cutandcolorparrucchieri.it/file/95870239726.pdfIn PDF document text
    • http://tpdw.pl/userfiles/file/kevujek.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607276afab8e7---pobuwiti.pdfIn PDF document text
    • http://berallebags.com/UploadFiles/FCKeditor/20210723170518.pdfIn PDF document text
    • http://vanprodukt.cz/UserFiles/File/51782475156.pdfIn PDF document text
    • https://louvre.lv/res/wysiwyg/file/96838229280.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078f36241749---pupidobidadinan.pdfIn PDF document text
    • http://freewest.at/sitatotalepirupinugikateg.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a512023a1e5---liwekatowake.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/1608f13d01cedd---salezenirapu.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a874558fee0---71795994755.pdfIn PDF document text
    • http://panziofabian.hu/fck_kepek/mabipuf.pdfIn PDF document text
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160872e29b9e0e---zejoborikesur.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ea30d39c4e---74568300825.pdfIn PDF document text
    • http://konstruktor33.ru/app/webroot/files/files/30588875368.pdfIn PDF document text
    • https://sandzak.best/wp-content/plugins/super-forms/uploads/php/files/e7c7b338ec74e27386697a0227e134e1/gemopepunuzogikikop.pdfIn PDF document text
    • http://0vote.com/ckfinder/files/labawonokugile.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e608276b427---pidawuzudewizefewu.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d7b63478dd5---fexosutodivoxuped.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/66bd973c8b6f95f499e1789f890b5837/sonet.pdfIn PDF document text
    • http://dj-venci.com/uploads/pages/files/86411674232.pdfIn PDF document text
    • https://gradeagroup.com/wp-content/plugins/super-forms/uploads/php/files/q611boegh47nelnpqqinf8a9a7/21029615469.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=board+exam+aglasem+com+up+board+class+12+time+table+2020PDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e82c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE82C 16784 bytes
SHA-256: e8bc93d411dde1a511f771eedf0db4ff78e1055683172b30a8543e35ef4174d4
font_01_sfnt_off000113ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113CA 11444 bytes
SHA-256: 17e55f22dec5aa2f50bbfc555e38db98594b61b247a27ac01cf6b123872e9dc0
font_02_sfnt_off00012e8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E8F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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