Malicious PDF — malware analysis report

Static analysis result for SHA-256 dea506e1226f987f…

MALICIOUS

PDF

81.9 KB Created: 2021-08-23 15:13:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 0c311a8879f170cf5bd5e2e04327ea1e SHA-1: bdcb6ae891155a4f04c84587d75e9d505e641a88 SHA-256: dea506e1226f987f96c4ef055dbc13aa2ab8a15c092576ad704e2cbc5a551bd1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier indicating a high probability of maliciousness. It contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting it functions as a link farm to distribute phishing or malware. The presence of these links and the overall detection profile strongly indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://acornschoolcharleston.org/wp-content/plugins/super-forms/uploads/php/files/edd939523e0d9ddff4e2478fbde8f3b7/gavibulusurekodun.pdf In PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/df392109e94dfade13ec2cb3e8e451bb/65599634227.pdfIn PDF document text
    • http://www.cafeinca.com/img/public/contenido/file/4646057091.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/16084424bccc4a---73991159598.pdfIn PDF document text
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/86926257954.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/160b7a8c49bf56---pawipipebomebuvik.pdfIn PDF document text
    • https://topjobsnepal.com/ckfinder/userfiles/files/87974005336.pdfIn PDF document text
    • http://www.propper-droppers.nl/files/file/72026947281.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/8211a4a0289dba4ed7437fbfc917793a/630064433.pdfIn PDF document text
    • http://aucoindeshalles.com/menu/file/mazotuveniwekad.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1608610ebf191d---55966710000.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/46cf1f6ab2ddad21f0a7ddf50ba24cf6/45824396181.pdfIn PDF document text
    • http://eau-msu.ru/ckfinder/userfiles/files/gilidagarogamalo.pdfIn PDF document text
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/n0jt2h8hld4idk18lm4ulgfo6k/julipiwikanidet.pdfIn PDF document text
    • http://haustechnik-hagenauer.at/29322181352.pdfIn PDF document text
    • http://cephedanismani.com/images/pages/file/79120612378.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16100a426baced---pijipexurizoposawe.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0ce94c8aa---23453834583.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/3kvfuosmhcou507kuqjsmk23tk/jikivuzasazub.pdfIn PDF document text
    • https://italvaping.com/file/telunat.pdfIn PDF document text
    • http://sendedianqi.com/upload_fck/file/2021-6-21/20210621152917673053.pdfIn PDF document text
    • http://polimak.pl/userfiles/file/70101032495.pdfIn PDF document text
    • https://lea-inc.com/wp-content/plugins/super-forms/uploads/php/files/ec5e0f0fb6d4e65e5d458a16edd31f2e/jezeduzoxumelaroxope.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=a+shape+that+has+6+sidesPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE1A 10268 bytes
SHA-256: 588da5ab7035896111b3831fecdc5a91da74f67756783b066aae8a40cfef9c26
font_01_sfnt_off0000f56d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF56D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010d7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D7F 16596 bytes
SHA-256: 793f831bc92afb667ffa02f5e1cfcc114a33edc7b28377206208db3d2d57f706

Open this report in the interactive analyzer, or submit your own file for analysis.