Malicious PDF — malware analysis report

Static analysis result for SHA-256 222a531e6e56db17…

MALICIOUS

PDF

84.6 KB Created: 2021-09-08 11:25:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 16dd7acb107479ae9416170eea32bfe8 SHA-1: 1f6c748bb54c4c4b02fc7fa81cc4f493f6b3325e SHA-256: 222a531e6e56db170b60935b66741c35649d3b472d53b81d1056644ddd756894
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by a machine learning classifier and ClamAV. It functions as a link farm, hosting numerous URLs that point to potentially compromised WordPress sites and disposable hosting services. The embedded URLs suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://aedwea.com/upload/foto/gubutunoza.pdf In PDF document text
    • http://odontoflash.eu/userfiles/files/vevuporuza.pdfIn PDF document text
    • http://everintelconsulting.com/upload/file/202108261226405293.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609486e596c98---95952475101.pdfIn PDF document text
    • https://livre-d-art.com/ckfinder/userfiles/files/sosozeviguvil.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/nanntl85vkki5knq5tat2gqi02/76602146139.pdfIn PDF document text
    • http://tourhong.com/FileData/ckfinder/files/20210627_F37500F1CA51B92F.pdfIn PDF document text
    • https://stratasphere.online/userfiles/file/jofijewetirafabemunodof.pdfIn PDF document text
    • https://uclerbaklava.com/resources/file/62103503827.pdfIn PDF document text
    • http://asahiru-ban.com/files/files/wigafukikikov.pdfIn PDF document text
    • http://dc-42351dc5a6b3.prshots.es/uploads/userfiles/1630429991/files/mipalonijimivogibuv.pdfIn PDF document text
    • https://rybczewice.pl/userfiles/file/torelepadibamituwisew.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093d44d98f0f---41225112149.pdfIn PDF document text
    • http://tverzhilservis.ru/foktver.ru/ckfinder/userfiles/files/7869971808.pdfIn PDF document text
    • http://eatoceanic.iorderfoods.com/uploads/files/wosimibofujemonu.pdfIn PDF document text
    • http://aeronautike.com/userfiles/file/damoxewapuzataj.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/1607ce3fdc0df6---kekogitu.pdfIn PDF document text
    • https://el-tall.pl/pics/file/25834616448.pdfIn PDF document text
    • http://thietbimaugiao.vn/Images_upload/files/buvatalovinenuxuro.pdfIn PDF document text
    • http://watdoenwevandaag.nl/upload/tegapuzifas.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087234022597---zilofogova.pdfIn PDF document text
    • https://paron-rebondir.com/uploads/files/pusojurizob.pdfIn PDF document text
    • https://www.litesourcenc.com/wp-content/plugins/super-forms/uploads/php/files/5c608eb975e25cf194f435d82a0e6b32/44832109822.pdfIn PDF document text
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bca7d87ea3---52345016747.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=demonolatria+nicholas+remy+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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE08 20056 bytes
SHA-256: 740ef31aac95639e050694e1568f3409530a5917afcf88086b6e9b7e091fd22f
font_01_sfnt_off0001133a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1133A 11000 bytes
SHA-256: 4cf1ba199f506bda2d0e60efee4eb338070159cec933948c0a116ad6cc8db137
font_02_sfnt_off00012c94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C94 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1