Malicious PDF — malware analysis report

Static analysis result for SHA-256 e989ba04a1d900da…

MALICIOUS

PDF

86.3 KB Created: 2021-06-30 17:01:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 16fc19a1ecb673e1e9b131206337607a SHA-1: 3f28d7d70146606f588ae16bc99d602fd9304b38 SHA-256: e989ba04a1d900da83e7d5fcb623aa721408a9f23572b78baf71ffe0003dc7ce
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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 http://costanzolegal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/88505473910.pdf
    • http://shinex-auto.com/userfiles/file/potavuvoluduratu.pdf
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/222ab4c5a77dadb303955cc1db88403e/balogofokesu.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a30a9a874cd---zemawosufuwibojadevi.pdf
    • https://svingenieria.cl/userfiles/file/dawibunafosojoji.pdf
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/160cbb63f91f74---kawivawideduk.pdf
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085b30963832---84238884933.pdf
    • https://timjanen.se/anvandarbilder/53/files/75375407234.pdf
    • http://alexanderkanevskyartgallery.com/clientMedia/file/21812288812.pdf
    • http://ineke-ott.nl/keramiek-beelden-imagesfile/lopikepugelupowekilujabov.pdf
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1609dae709cbb7---24601105592.pdf
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd433a1b34---menusedaziwugoxukamo.pdf
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607823a94c0b9---14497448356.pdf
    • http://patanamachine.com/imgUpload/files/xevawojesokekapa.pdf
    • http://jagatjyotischool.org/jagatjyotischool/userfiles/file/fisixawapevavaxukizeki.pdf
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/16077e16b3ce61---bokeba.pdf
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606f39efdd963---bogaxi.pdf
    • https://textosolutionslinguistiques.ca/upload/editor/file/pojifuw.pdf
    • https://aslimitada.com/userfiles/file/gitumabalodaparago.pdf
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080bb0899435---28866933129.pdf
    • https://louvre.lv/res/wysiwyg/file/jijodukudor.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=malcolm+in+the+middle+mom
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee5e.bin
92c0d744c6667b681e6de26f425e255f09c3e0848667f3b2c5359d871262d629
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE5E 10360 bytes
font_01_sfnt_off00010587.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10587 16792 bytes
font_02_sfnt_off00011d99.bin
37251ce3a4f96e0ec683c785c9ae93707e6bd000614e901fd4383018661acc29
pdf-font-stream PDF embedded font (sfnt) at offset 0x11D99 17968 bytes