Malicious PDF — malware analysis report

Static analysis result for SHA-256 eeaff84a7c68f7cb…

MALICIOUS

PDF

76.4 KB Created: 2021-08-28 01:59:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 09f7aecd72fb6fd7341cd858a1f758ce SHA-1: b447242d48ee924dd7ca885a1e97cf0b1b2ed35c SHA-256: eeaff84a7c68f7cb2d200b68bbb925d5e524e04675b17461eb85529df55cd923
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 WordPress sites, suggesting a phishing or redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious content or exploit vulnerabilities. No scripts were extracted, but the structure and URL patterns are indicative of a malicious link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9934

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://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/fc031b41d0723a5511f960831e91db73/xesevajuserurej.pdf In PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aee7837e5be---94848551100.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160713945c5b2d---77805062283.pdfIn PDF document text
    • http://litho-and-co.fr/ckeditor/upload/files/99264310454.pdfIn PDF document text
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a74d427e783---mafitipemola.pdfIn PDF document text
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/d099fd4400bee8ac821b5b45dc984c7c/fosiguvowepemifejefiwubuz.pdfIn PDF document text
    • https://educhina.mn/editor/files/desodulaliridakuxovewiziz.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608327915117a---vaminevasuvavopuvutidi.pdfIn PDF document text
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/3cbd77de658c3de9209d7468555f3ada/34238287302.pdfIn PDF document text
    • http://soupworld.de/upload/file/47961885894.pdfIn PDF document text
    • http://camel-republic.com/media/userfiles/files/14754715164.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/dmaa6rol1oha73p1ftckga6sf2/fatolerolodusu.pdfIn PDF document text
    • https://cardion.dk/gfx/fckimages/file/75875867979.pdfIn PDF document text
    • https://jpjplumbingandheating.com/FCKeditor/file/27314413603.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/f250458c3edd856dc5aee69652613911/zulopiwonomusar.pdfIn PDF document text
    • http://itkaufmann.com/images/fckimages/file/dovuzibep.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/ffb9ede93a5697f1afb3723d76c9397d/62733728847.pdfIn PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160c6bc935f873---wuvonesatobozubuveliwerad.pdfIn PDF document text
    • http://racecross.com/upload/edito_fckeditor/file/ruworipeta.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ad22edc233a---bemekatojagaba.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/16103966adac3a---memezix.pdfIn PDF document text
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/4f966412b358a2e7ec592280939e9433/jasinofinazonoponuvimu.pdfIn PDF document text
    • http://zoldjogsi.hu/uploads/files/vesusizedugukewotuki.pdfIn PDF document text
    • https://wrd13.com/force/file/mafogokikaritaxepomeritu.pdfIn PDF document text
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084fed01a31c---12598674254.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a370ca1b2d9---25354398842.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=good+cable+shoulder+workoutsPDF 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_off0000c8f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8F7 16108 bytes
SHA-256: 81a2efce204241455244976a3cdf6fd463fce2f6c586853fd1bfc358ea97b696
font_01_sfnt_off0000f22f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF22F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010a46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A46 10728 bytes
SHA-256: 00034e6c3bbd8b1615ae3fc66e0134aa1bf7f4c2200461a9637fb529c5abcd12