Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e0a9cc801ef7d5f…

MALICIOUS

PDF

81.0 KB Created: 2021-07-26 00:05:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 48bdce88aa08ac8700459d1807ad6797 SHA-1: 65770a7c10daa8598816cb9970687ea5daa72937 SHA-256: 3e0a9cc801ef7d5f19b7bf8f97d18d51bbc60ff7e03e717fbca2d2af75723f40
124 Risk Score

Malware Insights

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

The file was detected by ClamAV as a phishing trojan. Static analysis revealed it functions as a link farm, with numerous URLs pointing to PDF files hosted on compromised WordPress sites. These links are likely intended to lure users into downloading further malicious content or engaging in phishing activities.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3011

Heuristics 5

  • 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
  • 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://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/160dc9ec144c5b---bepizekivagilaf.pdf In PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160fdd16ac358a---sidojatevufanojowejelumu.pdfIn PDF document text
    • https://vallejardin.com/wp-content/plugins/super-forms/uploads/php/files/180a462e039ab4354501ff831734ee03/vezoxinosawufibezaj.pdfIn PDF document text
    • https://retta-bg.com/userfiles/junajixanalokorikudaduku.pdfIn PDF document text
    • https://tonymusic.se/UserFiles/files/dojamuxi.pdfIn PDF document text
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b297e109ce1---93580274409.pdfIn PDF document text
    • http://lorichphoto.com/pictures/file/67861860188.pdfIn PDF document text
    • https://gbeequestriansurfaces.com/wp-content/plugins/super-forms/uploads/php/files/3gpfh1dkn1h9maim51g7g6rft2/bibulenonafoboge.pdfIn PDF document text
    • https://juniorclublivorno.com/sitonews/images_upload/files/buvafigaripipofewa.pdfIn PDF document text
    • http://a-swiss.com/upload/userfiles/file/xevomisokome.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd4be91a776---7405527123.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/cdaaf114ae1c9904ee3fff9a97fa25b3/41681496595.pdfIn PDF document text
    • http://boxshop.mn/userfiles/files/65594208457.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b7804fe93bc---5734898520.pdfIn PDF document text
    • https://stayinbranson.com/ckfinder/triplebuserfiles/file/koxogeketagegon.pdfIn PDF document text
    • https://groupunsur2.com/contents//files/42954245019.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/a41e97674dd83ba4c1112b3fde522b74/fimeg.pdfIn PDF document text
    • https://bwawarszawa.pl/upload/file/wowivobowi.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cde0b0d7cc---salofotu.pdfIn PDF document text
    • http://stonestudio.pl/files/upload/file/16719697903.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16089eb38292f3---tuwewonadigitawulizuj.pdfIn PDF document text
    • http://benardoutlite.com/admin/fckeditor/fckdata/file/sotanukudugi.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16073ee009a330---bulisifewexejotubozi.pdfIn PDF document text
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16092404c4f379---sepomademanovimotimokita.pdfIn PDF document text
    • https://contactfm.be/userfiles/files/vojibosez.pdfIn PDF document text
    • https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/ba0d0df97ca3867618061dbc10d78c5a/46117302938.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=generador+de+vapor+para+ba%C3%B1o+turco+dom%C3%A9sticoPDF link annotation
    • 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_off0000dcf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCF9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f50b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF50B 18788 bytes
SHA-256: dd7d48859c2000acc328fdfc209e071076b2523a3e40458e3653e58e57027813
font_02_sfnt_off000124d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124D6 11336 bytes
SHA-256: 84eba0384d5164da8db9d5adc3edaf1dac8611a95153159a60ebb95251a4e7fd

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