Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ebbe94ca4fc229b…

MALICIOUS

PDF

128.4 KB Created: 2021-07-17 22:58:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: e0f09094079b70fc2844e2bfebbf55cb SHA-1: 06af5b2af0ef4233bcc10f63f34d6415a79e579f SHA-256: 2ebbe94ca4fc229b948c45608e3fc14cd7950b580abb4a0a6d05e871e969f267
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to numerous compromised WordPress sites, indicating an attempt to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9635

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/ngphleb0hbt0365o7bsvn9i41r/53200138067.pdf In PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/2llfg5vsalc4dnecevf48o9ti3/zuxelad.pdfIn PDF document text
    • http://alexanderkanevskyartistbiography.com/clientMedia/file/28343440256.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160785186b5dd6---xikezeduminopazolutaxuded.pdfIn PDF document text
    • http://airholic.com/UpFiles/WebEditorFiles/file/tupexunegazabowadugijigur.pdfIn PDF document text
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/822293187fabac085fcf44d12d7b5a5b/91347428945.pdfIn PDF document text
    • http://cattaneoarchitetti.it/userfiles/files/89467847565.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160cccd6204ced---xefanezenogeregivebaru.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dacd19de2e7---64361694041.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/029835b2b412ca391a47af81cff5655f/66458469348.pdfIn PDF document text
    • https://churchofgodinjamaica.org/app/webroot/files/xiniradej.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/bb93194d4a2453c753433dfe65114158/fuwinofamogagofadezidaf.pdfIn PDF document text
    • https://edubox.mn/uploads/users/0/files/65306633182.pdfIn PDF document text
    • https://fundreamz.com/ckfinder/userfiles/files/27172051259.pdfIn PDF document text
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e970b89581---mizafozuravarixin.pdfIn PDF document text
    • https://clubforeducation.com/FCKeditor/userfiles/file/runokolafobemogedudabi.pdfIn PDF document text
    • http://artside.org/data/temp/file/subusinisebevosipekame.pdfIn PDF document text
    • https://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/3d23a953a953b0f6802873ebd80fbced/39808096917.pdfIn PDF document text
    • http://soupworld.de/upload/file/seniliwedalilebidavijijow.pdfIn PDF document text
    • http://clinicaveterinariagoitese.it/userfiles/files/12701719553.pdfIn PDF document text
    • http://noithattamphuong.com/upload/files/modavugenadodunutopediku.pdfIn PDF document text
    • http://kme-kme.cz/files/file/36709507989.pdfIn PDF document text
    • http://abwmechanicsville.com/uploads/files/73410641818.pdfIn PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ac34e5d04c---81453027519.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/viba39abmfvkgfbsm71s8bpdnf/80535421441.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=calligraphy+art+meaningPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000154b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x154B6 8164 bytes
SHA-256: 3dfd52e7cab6ad3e0c592c3cd4c9d6a640641b658cc7fcee40c4f6099f29e087
font_01_sfnt_off00016fac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16FAC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000187c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x187C3 10556 bytes
SHA-256: 34ff10352055eabcdb51f856f469b1ad118c389ab71e88ca4b8b0e652ce5ae48
font_03_sfnt_off00019fa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19FA6 17248 bytes
SHA-256: 4a828038b5e30eb66995f215b05bba8fabde9c6653a2a51eedaefab6e1225fdc
font_04_sfnt_off0001b93d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B93D 23112 bytes
SHA-256: 7b2cd380e7e8b7f0c5d9e1a2f75546b9c67b13a1007cd0def6c5544aeda2b716