Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ec7c767d9ec225c…

MALICIOUS

PDF

89.8 KB Created: 2021-07-04 02:07:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1b87376307d54708d6fffa1fe35a40db SHA-1: faeef3287624471df5df42256b621749569d6c47 SHA-256: 5ec7c767d9ec225cba8c642774b7702979646e3bdf3593567d4ead15008fb05b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous links pointing to compromised WordPress upload directories and disposable hosting, suggesting it is part of a link farm designed to redirect users to malicious sites. The primary purpose appears to be directing users to external, potentially compromised, resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://thankschicken.com/uploads/files/koketekamixutipixomure.pdf
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bcf5e8966e---welakiselinunanuludatodo.pdf
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/16074532491368---62490811855.pdf
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/fc15646ff54a71bb645486a72fb305fe/76678240811.pdf
    • https://collegemahan.ir/basefile/collegemahanir/files/8479594372.pdf
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16076895a1ca41---42891204996.pdf
    • http://aldo-ins.com/userfiles/file/14365332898.pdf
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160afe554a6182---76422109141.pdf
    • http://quangcaosms.org/media/ftp/file/midojexege.pdf
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d839baee21---zakawoluxikazaxazikel.pdf
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/160744ae531385---45758180981.pdf
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/c76db08575439309722fecd708bc72c5/rapitowibotenedofex.pdf
    • https://gotoko.com/cmsv2/upload/files/tamuwirobezutosibekakuwo.pdf
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/11c10e79aabdab0ce65940e0ebcada17/14568619657.pdf
    • http://yasaitogo.com/uploads/files/diwefurubekenoregafewagur.pdf
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16075ac211c25a---81397170245.pdf
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/966d276acd57634e5031ddf0d172eb9b/71787763831.pdf
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16072556493a8f---22759978241.pdf
    • http://gramercygrand.ru/files/file/xifipebeg.pdf
    • http://smithmaloney.com/clients/3/32/32eae1a42220421eddab78da2f55685d/File/nirekusu.pdf
    • https://lescourailleurs.com/upload/editor/file/81717034031.pdf
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1607f6833e8637---kilomurawikesuside.pdf
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16075d5b28c85d---97330354434.pdf
    • https://nhadatonline24h.com/Images_upload/files/vuxotemudinagul.pdf
    • https://travolution.travel/wp-content/plugins/super-forms/uploads/php/files/53676d827e191edadc43df03831bc060/12005735184.pdf
    • http://aimic.com/userfiles/file/budexesimonaperi.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=skeptical+in+a+sentence
    • 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_off0000fe26.bin
a85feebc663f99c1ef5dafcc04236c4b81e990a1088759c962054e80c5168163
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE26 17128 bytes
font_01_sfnt_off00012a22.bin
fc9da94bb54fed63ce3dc98c4a1f5332dacb917da2b373d6d3b472d345914997
pdf-font-stream PDF embedded font (sfnt) at offset 0x12A22 10312 bytes
font_02_sfnt_off00014181.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14181 16792 bytes