Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5ee46aa8e08ce7a…

MALICIOUS

PDF

94.8 KB Created: 2021-07-15 09:15:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 995c474304530db02e4b29a63fc8c96c SHA-1: 649a9a066a05ed968c9e4932cf142f55ade90108 SHA-256: f5ee46aa8e08ce7a62b4407f98a097512c97e99df0bed139fe64048524326da7
156 Risk Score

Malware Insights

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

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a large number of links, many of which point to websites hosted on compromised CMS platforms, indicating a link farm designed to redirect users to potentially malicious content. The document body is heavily obfuscated and contains no readable text, suggesting its primary function is to host these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9918

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 https://marbellamohali.com/wp-content/plugins/super-forms/uploads/php/files/d32fb68007cd66864265c0cd5c21a197/62828264622.pdf In PDF document text
    • http://fondationmonetoile.org/clients/0/0e/0ecfe6182781ff486fe5156d2e85c11d/File/50298152601.pdfIn PDF document text
    • http://101balkon.ru/upload/files/pomaroridewagazarolij.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606caa1a8b7d6---murivujik.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3c6ac9c799---sokeveden.pdfIn PDF document text
    • https://alatheir.com/atheirwsfiles/file/29926290734.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/umdsmvrr4mal2u1vd227t74fa2/wugajexuwidizagezuxufivux.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/q2pabi5i8uj1vr7rikc0r8e4gu/21542876979.pdfIn PDF document text
    • https://nguyenhungstone.com/uploads/image/files/xolulepusisumizipuwezesu.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/6b6ff7e294b3057d54ce4c5ca6e75cca/85412807333.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc755b6cd57---81311016145.pdfIn PDF document text
    • https://rivieresoceanie.com/ckfinder/userfiles/files/kabuxifakezugenam.pdfIn PDF document text
    • http://amctop.com/board_data/editor_img/file/202106071627.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/ec568f76fdb66291aa0eb775caf1c667/98608890986.pdfIn PDF document text
    • http://bertoniamministrazione.it/bertoni/public/file/70565991781.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/tuvoju.pdfIn PDF document text
    • http://szkolaprzybranowo.pl/ckfinder/userfiles/files/67875845099.pdfIn PDF document text
    • http://martom24.pl/martom/userfiles/file/jazid.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b5e57445e35---82871852447.pdfIn PDF document text
    • https://network-italia.it/file/wipusozovadija.pdfIn PDF document text
    • http://toanlinh.vn/upload/files/29107329066.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607cf85039e81---19683254698.pdfIn PDF document text
    • http://dabaizhongxue.com/upload_fck/file/2021-6-26/20210626005918624442.pdfIn PDF document text
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abe759a2f8a---5037266046.pdfIn PDF document text
    • http://studiosantese.eu/userfiles/files/penifulowolusuviworufavev.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=mexican+slaw+for+carnitasPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F9 10512 bytes
SHA-256: a55a28a9a33ee6e8d5158e20f73c104f6c441d92491a5bc1a03d3599c6f0a6d8
font_01_sfnt_off0001091d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1091D 20548 bytes
SHA-256: 78d4c0ddff459f6b3af2bf3c7ca2f2b6df70c44275e2c74e087b85320830e363
font_02_sfnt_off00013dad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DAD 16312 bytes
SHA-256: 7d15b2d6d265aaca51dda18faee70a1b8fa9d95ed54cb111fb0895789092f9ae
font_03_sfnt_off000153b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x153B8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1