Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ce725c9736afac5…

MALICIOUS

PDF

86.5 KB Created: 2021-06-26 05:52:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5a5d4d1912ff5e6b97e25d433d57f915 SHA-1: 29daddeb0294cb48c569c183753a1bfac553014d SHA-256: 5ce725c9736afac50109831a19f9a65742fda5b12b5b478c73379f6b8c5ba7c1
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 pointing to compromised CMS upload directories, indicating a link farm designed to host or distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery through these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c87d287241---77732333736.pdf
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/7abb12d4c7005eb07e49810333798524/xugimutavas.pdf
    • http://bitite.lv/media/txt/122/file/kovezoxitura.pdf
    • https://ols.lighting/wp-content/plugins/super-forms/uploads/php/files/da5e69685cd66793832f16cd8b6e5278/selimijakeveferivebukozow.pdf
    • http://ovartec.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097f2ba42b60---sunukufaxafopin.pdf
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/vufefi.pdf
    • https://athensviptour.com/wp-content/plugins/super-forms/uploads/php/files/49c04d146482eeddd13ee0d58c661464/japogojawakuk.pdf
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fcd0e9f5f5---71753988934.pdf
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/qp5e0cc76fasusr9nutrul9kp2/38751228677.pdf
    • http://wksystems.net/HotelEstimator/userfiles/file/39093817579.pdf
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/745c8a5951cf79409eb7d4f9188b68a5/62367036839.pdf
    • http://firmen-bekleidung.at/userfiles/file/53894501142.pdf
    • http://thegreenlegacykeepers.com/clients/e/e8/e8dc17949b7ef813e9937e453902477f/File/vemulepojekoge.pdf
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/iui4d2jl5k03ibetkm8ktk9iv3/kefeda.pdf
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/03dc68def6431d177892323531f00469/tuvegomapo.pdf
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608485f85cbab---luvotejujewelonopize.pdf
    • https://topinsolventa.ro/userfiles/file/25370721693.pdf
    • http://akcjonariusz.com/UserFiles/file/geruzitakejonuvopexaz.pdf
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609424b709101---13239416743.pdf
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/2so1jd0kjfo0ditjc7l5g729b9/revelogewepe.pdf
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/fb3243b17d5316205f76b0761d9fbcb5/vusononedivoxo.pdf
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/160c3a892daed0---17572322471.pdf
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607fbe4101891---xukexaveka.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=bright+angel+lodge+rooms
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/629718e0257398c32006f814e659a1df/puzaga.pdf
    • 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_off0000eea0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA0 16792 bytes
font_01_sfnt_off000106b2.bin
e548121abeefbebe303cc04fda8c5be15583fffca7558e97c495034d16059b4a
pdf-font-stream PDF embedded font (sfnt) at offset 0x106B2 17540 bytes
font_02_sfnt_off0001349b.bin
f37cc02ea77b49ab566945092fc6758a081ce42357c97a4414311dec0ef1f2e9
pdf-font-stream PDF embedded font (sfnt) at offset 0x1349B 10748 bytes