Malicious PDF — malware analysis report

Static analysis result for SHA-256 2966008eeff4f334…

MALICIOUS

PDF

419.9 KB Created: 2021-07-05 19:11:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: c2478f826c922afdbeff9e840b1cc966 SHA-1: bd12d9f975ea31a2e3d47ca7a2db91b0b885680c SHA-256: 2966008eeff4f334f8deb0f4fdf0e527621d67a25b73347dc25c9073b20fb5dd
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links pointing to compromised WordPress upload storage and SEO redirectors, indicating a phishing or malware distribution scheme. The ClamAV detection and ML classifier further support its malicious nature. Although no scripts were extracted, the presence of external links and the overall structure suggest an attempt to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8252

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.
  • 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://allamericannursing.com/userfiles/file/44643295731.pdf In PDF document text
    • http://donaldnathanlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/16779251006.pdfIn PDF document text
    • https://terryhaas.com/wp-content/plugins/super-forms/uploads/php/files/55e2370ee601d76280869d93f1465c4f/kekulumukinovo.pdfIn PDF document text
    • http://artecgroupservices.com/imagenes/file/jetuve.pdfIn PDF document text
    • http://thegibbsfamilyreunion.com/clients/d/d9/d929505c7faf6263097cc97620c39d65/File/dafuxiduxega.pdfIn PDF document text
    • http://jpmoto.biz/upload_picture/tupobasowejajenuragus.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609590da26790---zevaxalus.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/47d27981969c094adae0c024adcd081f/25420534905.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cefb8d71711---wozobevevevarurofulaza.pdfIn PDF document text
    • https://tepihtrava.rs//files/xoxamarutafotifu.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b203eae2a15---86358655807.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dda4c5d827---tusirepo.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/2e2e4020ffaa7ab3b98ae7317d0315d3/16816424525.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160bd7b41d53a2---kotejobomiku.pdfIn PDF document text
    • http://rockpapersun.com/upload_mce_image/file/bedidolaziw.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c89fd568ef---vuwezisabepixejibasani.pdfIn PDF document text
    • http://studiotecnicoforace.eu/userfiles/files/6090096698.pdfIn PDF document text
    • http://axiomestates.com/userfiles/file/kipowikifefag.pdfIn PDF document text
    • http://abogadosaguilar.com/ckfinder/userfiles/files/monozixatodijisadobelafi.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1b0526d84a---16159870089.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/160767036278d3---ruwer.pdfIn PDF document text
    • http://op-gold.com/ck_image//files/rufoma.pdfIn PDF document text
    • http://philipwillettelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/24417204179.pdfIn PDF document text
    • http://aite-materials.com/upfiles/file/mavoxo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=foundations+of+materials+science+and+engineering+pdfPDF 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_off0005ef16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EF16 1284 bytes
SHA-256: 3f2eb68e56e0cc9b24f861ad510cb196f24dbc520975aefba06cb0b93c7ac786
font_01_sfnt_off0005f671.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F671 16528 bytes
SHA-256: d05572fa6d97c14d6dcf243af8f55200e62774ff7371bae6f3ed6b7fae9ae2d9
font_02_sfnt_off00060d8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60D8D 23068 bytes
SHA-256: f6c20eb6c9e04347138931c2bde272604beedf2352b2cf28ce465e99ae7b9f97
font_03_sfnt_off00064d00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64D00 11040 bytes
SHA-256: a16d61347184f8717ab5646ad37c28e2422f380431d76f8f1f4aa6d9b7213cdf
font_04_sfnt_off0006667f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6667F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1