Malicious PDF — malware analysis report

Static analysis result for SHA-256 fddd8e8eba0d6571…

MALICIOUS

PDF

85.3 KB Created: 2021-09-06 15:28:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 07450a8d7f22bd4bed76aa7e92c15f23 SHA-1: 385f5a3a5795fee8e8d86eba8b089a4c8dea6be4 SHA-256: fddd8e8eba0d6571c3fb190ac92e33ec31ebfcc825a4e4a35518d269774a45ca
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded URLs, many of which point to compromised WordPress sites or disposable hosting. The ML classifier strongly indicated maliciousness. While no scripts were explicitly extracted, the structure and numerous external links suggest this PDF is part of a phishing or SEO poisoning campaign, likely intended to lead users to malicious sites or to manipulate search engine results.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 5

  • 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://catamma.ru/uplcv?utm_term=sharper+image+drone+manual+pdf PDF link annotation
    • http://oilandgaswork.com/userfiles/file/nabikaram.pdfIn PDF document text
    • http://www.morrisjones.co.uk/EditorImages/file/gurukezakurubib.pdfIn PDF document text
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/dd0b453d01397b195b946ef5327b7a59/bozilakebazikomu.pdfIn PDF document text
    • https://go2germany.ru/files/file/safasukazamapoxekon.pdfIn PDF document text
    • http://fsgpj.com/upfolder/e/files/20210801142954.pdfIn PDF document text
    • http://kovospm.cz/fotky/file/jewogesomufobij.pdfIn PDF document text
    • http://galantemontagnana.it/ckfinder/userfiles/files/49243825644.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611c633f1816e---33955601459.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/n6vk2s4r2m4njvu2pekh799847/tadixanodevatawogewo.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/a2604de6e0a4c3608f26da79f3f5337f/32944543744.pdfIn PDF document text
    • http://nanumed.ro/uploads/files/jagorenajukagurexufifalo.pdfIn PDF document text
    • https://www.harasportcenter.com/wp-content/plugins/super-forms/uploads/php/files/0u1iimadv2um6dtf9ic0heunof/darapuguxokigabofisixiki.pdfIn PDF document text
    • http://kkitv.com/images/upload/File/lanukibexi.pdfIn PDF document text
    • http://9jamail.com/FCKeditor/editor/filemanager/connectors/userfiles/file/12003551352.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1609cfd6976c9b---fuvekakuxekeguwoze.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c79cd27ff99---ruxewagus.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16082618de2f38---xogasetakasududajitubovo.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/1607dacf92600d---bukadovusifuxap.pdfIn PDF document text
    • https://fetogram.com/images/upload/files/86505704884.pdfIn PDF document text
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/3f70ca4b0a0139223e9c891ae0165293/51682882323.pdfIn PDF document text
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a38f286105a---73201633494.pdfIn PDF document text
    • http://safarang.com/basefile/files/52093561724.pdfIn PDF document text
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f6c91296973---94035453068.pdfIn PDF document text
    • http://artetendasud.it/userfiles/files/rodiwiriwejulasoj.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e803.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE803 17800 bytes
SHA-256: 55ac889a401d1b97a4b8fd792333929876924489c15441ecc1b723ddb8bc6e3d
font_01_sfnt_off00011687.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11687 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012e9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E9E 10852 bytes
SHA-256: 5017e310bfc217c92736d8906847bb095dcbf35d1de93b4616605cb40dcbe7c4