Malicious PDF — malware analysis report

Static analysis result for SHA-256 e05ad942dd66e6a2…

MALICIOUS

PDF

119.8 KB Created: 2021-06-30 04:12:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 978f3d3f88e1752d568c373094d7f7e8 SHA-1: 50ae99c51265764364c06e23e22117a9ee9d836f SHA-256: e05ad942dd66e6a22a6b9b74768d9dd868fca50cc14227931dc42c7b0543a839
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs that point to various PDF files hosted on compromised websites. The ClamAV detection and the presence of a link farm heuristic indicate a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF format itself can embed JavaScript, which could be used to facilitate the redirection to these malicious URLs.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3126

Heuristics 5

  • 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
  • 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://synerhu.ru/uplcv?utm_term=the+tao+of+wu+pdf+free+download PDF link annotation
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/brhtm6ja03641i5vgi8g9irhg0/bobulagonesusa.pdfIn PDF document text
    • http://stellamaris.cz/userfiles/wesizo.pdfIn PDF document text
    • http://istrouma1971.com/clients/9/9b/9b88b062b8d6af44b28e209fcb06d7d5/File/nupusopimetepivo.pdfIn PDF document text
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/89a6610e917db2a29b56c4a3c3bf7148/41797757069.pdfIn PDF document text
    • http://techscreening.com/userfiles/files/43994785883.pdfIn PDF document text
    • http://fritz-fahrlaender.ch/download/67889793393.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160766e0c01f16---32517810643.pdfIn PDF document text
    • http://hiddenforrest.net/clients/76790/File/bonajuzad.pdfIn PDF document text
    • https://amitadevnani.com/userfiles/file/mafosevobid.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090e8c3b7e3a---dodikul.pdfIn PDF document text
    • https://africanresearchcenter.com/userfiles/file/97171442016.pdfIn PDF document text
    • http://kagoshimakojintaxi.com/userfiles/file/vebufesosekeropimale.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dacfbdd1e86---40254729604.pdfIn PDF document text
    • https://beautydiction.com/ckfinder/userfiles/files/tukisopazesimev.pdfIn PDF document text
    • https://rinducm1.com/contents//files/pezitabizonosubo.pdfIn PDF document text
    • http://porpora.info/imagenes/imagenes_contenidos///31337860233.pdfIn PDF document text
    • http://jaatkinson.com/userimages/50327530568.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/d15c906f3145fdc13f6d5a3295214be7/3035434305.pdfIn PDF document text
    • http://bualuang101.com/backoffice/upload/files/fapagolofatuj.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/f8f8cbe09e032bf4f52f8aa877d5f020/kizonanulejesuralapodo.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a14c8df9b5---rujupeganowipopolanivopu.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609da741ab4cb---90606129869.pdfIn PDF document text
    • https://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/ci3onne28n9i9gganejshdns08/virikapodonivojevafa.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ad883208370---61363529427.pdfIn 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_off00015deb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15DEB 17980 bytes
SHA-256: 1eff422f08ed605ef2d7a99aef26b7665c6752f25bfdd0fd908feb2158e490d0
font_01_sfnt_off000176fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x176FC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00018f0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18F0E 21352 bytes
SHA-256: b2db5afee47131cd128de4cdc102701879f11c62fd0b368c5259f411daf51102
font_03_sfnt_off0001c374.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C374 10484 bytes
SHA-256: 6c6003a34bee79c22164a4a9b25a282b854d87e6c5bcd770de7697db8a81919a