Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f07f7469611153c…

MALICIOUS

PDF

85.3 KB Created: 2021-08-09 05:24:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 1a855d84c2a63ccc0e063851e786fe9b SHA-1: 19590d81d8412047b253817576d619d263f67577 SHA-256: 5f07f7469611153c3dcc1c02fa8c64cb8c2a3889c6062f1a4f519948980d2675
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://wastran.ru/uplcv?utm_term=el+mundo+imaginario+de+keri+smith PDF link annotation
    • http://obasekiestates.com/UserFiles/file/juwuruwozagikexazaru.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/16076eb14972b1---79359198361.pdfIn PDF document text
    • http://www.derbysignandgraphics.com/uploads/file/6536965890.pdfIn PDF document text
    • http://audiencefertilization.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/63177989409.pdfIn PDF document text
    • https://peterdegendt.be/file/41038043636.pdfIn PDF document text
    • http://avvocato-callegaro.it/public/file/jobixepuzeze.pdfIn PDF document text
    • http://panyuchen.com/ckfinder/userfiles/site_eachfun_com/files/piwezetitorofiboke.pdfIn PDF document text
    • http://danguykhoidoanhnghiephp.vn/Upload/files/rowipodifekujewefevow.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/fcqbgiv1838lmbouqgsi3u2o9m/wexinoroxodu.pdfIn PDF document text
    • http://gardnersunited.com/clients/e/eb/eb3320446930dd457027df34457c622b/File/pukememokobavipu.pdfIn PDF document text
    • https://jagamimpi.info/contents//files/jatatalozopab.pdfIn PDF document text
    • https://hotelexpert.ro/uploads/files/34335722955.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/113c9f12c792fc1e1a4225874eaf3b68/nebuzefupufilegusu.pdfIn PDF document text
    • http://cupta.org/userfiles/files/20210629212537.pdfIn PDF document text
    • https://kajariaadsevents.com/admin/uploads/file/sowizepegagidemidora.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/160fba167d3a6a---81160163040.pdfIn PDF document text
    • http://mav-auto.ru/images/file/12196210007.pdfIn PDF document text
    • http://gitishahjahanpur.org/ckfinder/userfiles/files/dowuripatujujokakemikis.pdfIn PDF document text
    • http://araonline.hu/uploads/file/buripumutivujewuxejen.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/ddedb1e6285d24d400993cf8134d3514/32698051565.pdfIn PDF document text
    • https://meganimal.pt/site/upload/file/64043874417.pdfIn PDF document text
    • http://mousike.it/img_ins/files/delalo.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/f913f7e546897e174eb454b969f1f3ef/dilivak.pdfIn PDF document text
    • http://debeleven.net/UserFiles/File/59694960549.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cee9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEE9 10872 bytes
SHA-256: e93e85c7d81e8ebbae33993e1689633e2742080fd923308b1b70ee4d239cc51b
font_01_sfnt_off0000e78d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE78D 18464 bytes
SHA-256: b98cd33363f4169d20a85fbb63f9941c9976d62f5d8207edbda42dd60e6be8d2
font_02_sfnt_off00011704.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11704 16140 bytes
SHA-256: 00b1f632e8afe72716c8bcdb76b7901b56c060d1dc0f96f3f5c1b8373b85735b
font_03_sfnt_off00012c80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C80 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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