Malicious PDF — malware analysis report

Static analysis result for SHA-256 f05050733f1365ab…

MALICIOUS

PDF

87.8 KB Created: 2021-06-28 15:42:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: b1d01268209dfe3bc1901c458ddf86fd SHA-1: 11de7756e7498176e4299f63b6b988b86312b963 SHA-256: f05050733f1365ab22da967f738a2129b924b63814c7a6469b0c95b178e1cf0a
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document exhibits characteristics of a malicious lure, employing a link farm strategy to direct users to compromised websites. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely instructs users to open a password-protected archive, a common tactic to bypass security filters. While no scripts were directly extracted, the presence of embedded URLs and the ML classifier's high confidence score suggest a malicious intent to deliver a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

Heuristics 6

  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://inwebjor.ru/uplcv?utm_term=hotel+california+tabs+fingerstyle PDF link annotation
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b303fba08b5---28747785736.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/8f877dadb4126e4fd4b35ef27d7a761c/87029734608.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/727b33561b474c703939faa205755a3d/poxixaxuw.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607e836037527---nalovunivunalupifasodom.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e7d99da177---titokowepodid.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/082d2d53ab12e224d671f14077980fd9/tabexitutevomaze.pdfIn PDF document text
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/9e9d347de6efdaa7f505f4be929f6d60/53713176669.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/53e5efedfe1095fb01f1b80a34382a72/78172102074.pdfIn PDF document text
    • https://allmassage.net/upload/file/20210524212316.pdfIn PDF document text
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/2bfeedd82e06205c912b83627cc00344/wajupidivijunibetijaxipi.pdfIn PDF document text
    • http://wittlich-luexem.de/userfiles/file/lexoguvitiv.pdfIn PDF document text
    • https://angkorphotographyguide.com/userfiles/file/niguwudojezexa.pdfIn PDF document text
    • http://hzbmsj.net/images/upload/File/pifoxiziromatuwob.pdfIn PDF document text
    • https://tangentemag.com/img/file/lejetexubop.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/83bb3c2e8c3159b547a6f19ccc166852/zafeminadukax.pdfIn PDF document text
    • https://hoalavender.net/upload/files/wodeted.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/dizazakixaxunevifusakajo.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609433e30b6bd---75892320328.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083b5d23d87f---wawoje.pdfIn PDF document text
    • https://karinbentum.nl/uploads/file/27937890683.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/104a44d402d7b0ce53c9540ed7ea532f/tiwoduvigerabimubarotap.pdfIn PDF document text
    • https://artenika.pl/fck/file/ketifaxas.pdfIn PDF document text
    • https://aftaplan.com/works/peepsparty/html/upload_files/file/buxigosusomewenuxasek.pdfIn PDF document text
    • https://amitadevnani.com/userfiles/file/weguvobuxirebij.pdfIn PDF document text
    • https://akapacha.com/userfiles/file/rejabakalafetitojorimo.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_off0000ddeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDEB 17080 bytes
SHA-256: 5a023e22dcd93fecdfd2b5ea86a6d4c69e9be586330047c6576a54a1cf133025
font_01_sfnt_off00010aed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AED 16108 bytes
SHA-256: a31e141fb2917ac6221449cb8c95e700680d048453672ad8ad57cd6853c5c53b
font_02_sfnt_off00012019.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12019 10756 bytes
SHA-256: b1f5551d14b764c48bc7a5130123c1e6206de570221dcd8f677b5d878839caa5
font_03_sfnt_off000138f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138F5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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