Malicious PDF — malware analysis report

Static analysis result for SHA-256 feea57fbf7429394…

MALICIOUS

PDF

79.0 KB Created: 2021-07-15 12:38:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 3611dcd24ac488a8ab5f6cee8c255828 SHA-1: 1d86f83fab005dd4d95a3f5ff1c5569b7650ddcb SHA-256: feea57fbf7429394993ee48205023a3403a5e38d5b429fd12960805914f57ac6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains a link farm with numerous URLs pointing to PDF files hosted on compromised WordPress sites and disposable domains, suggesting a phishing or malware distribution campaign. The presence of embedded JavaScript, though not directly executable in this PDF context, indicates potential for more complex malicious behavior if the document were to be processed differently or if it's part of a larger chain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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 https://irlanc.ru/uplcv?utm_term=and+sings+my+soul+my+savior+god+to+thee PDF link annotation
    • http://lab4050.com/upload/editor/file/69086878064.pdfIn PDF document text
    • http://dailymaydemtien.com/userfiles/files/57566466059.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/8ff8c78517291dbd2f186675f13b661c/49346291944.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/1607e8d508a9ec---kiwanode.pdfIn PDF document text
    • http://gramercygrand.ru/files/file/xetimudavowupasinekatikoz.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fc51c80729---42183202687.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0b57eb05ce---66666967771.pdfIn PDF document text
    • https://network-italia.it/file/42832987304.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a424a45b6c0---bodideraxadapivomude.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/d6i7lddheb9rt5j1vt50406kqe/momatitiwidog.pdfIn PDF document text
    • http://smartickgroup.com/userfiles/tajop.pdfIn PDF document text
    • http://kursadowicz.pl/Upload/file/keviwokajed.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160703f1e75647---98180438837.pdfIn PDF document text
    • http://paramountswimwear.com/userfiles/files/36169968253.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e8f60d808d4---vedujimazopebilekexafez.pdfIn PDF document text
    • http://luingpyrex.cz/foto/Image/file/danezawarorukepogedajuleb.pdfIn PDF document text
    • https://zifu-tech.com/app/webroot/userfiles/files/zasise.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609004a6881b9---xopijotatemokudil.pdfIn PDF document text
    • http://bobhendrix-law.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/7434537363.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/6m76hgkt6mapquh7sij95ht5g4/gagekagovatu.pdfIn PDF document text
    • http://cmuniontravel.com/userfiles/file/31306172159.pdfIn PDF document text
    • https://lightspec.ca/wp-content/plugins/super-forms/uploads/php/files/1d7a4c1ef9cb467c6f6a36f1f7bb7e88/960073500.pdfIn PDF document text
    • http://morard-mcf.fr/data/Files/82223545920.pdfIn PDF document text
    • http://logo4you.dk/userfiles/file/26571118841.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_off0000cea3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEA3 17596 bytes
SHA-256: 834ff17c2413df3339072a8b44dfec59ae6462a1286f6e78161d08519493fb2a
font_01_sfnt_off0000fb8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB8F 10956 bytes
SHA-256: 90c484f545e3dfcc8bdbb9e02a685e13968e2497cbd32c211414d6987d8831bd
font_02_sfnt_off000114a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114A6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1