Malicious PDF — malware analysis report

Static analysis result for SHA-256 999d5057d2f066bc…

MALICIOUS

PDF

109.2 KB Created: 2021-08-12 04:17:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: fcf2b9eac68903f0a4f7b7c212791c54 SHA-1: be3784f3ade42246795826fcd0d1703b13a163fe SHA-256: 999d5057d2f066bc9fa947386b314b87fe8cd48a1b34d0ab9d82030f583fce5a
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress upload storage and other disposable hosting, indicating a link farm designed to redirect users to malicious content. ClamAV detected this file as 'Pdf.Phishing.Trojan', further supporting its malicious nature. The embedded URLs and link farm structure suggest an attempt to distribute phishing content or malware.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3654

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://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/bn4iueohqknc1om6p85c357rd5/lofofetus.pdf In PDF document text
    • https://xlspandoek.nl/userfiles/file/gibofixok.pdfIn PDF document text
    • http://emeraldcovepartners.com/_data/images/file/molasajejimufifukenopur.pdfIn PDF document text
    • http://coalcreekcentenary.com/clients/5/52/52f735e63eff8706e1a2a73a20aef632/File/bepobepixutusexanibimewu.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fdad8e8534---66815015219.pdfIn PDF document text
    • https://accu-split.com/userfiles/files/sumis.pdfIn PDF document text
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/ec1a3026a6982c1d609009ddf0c2c699/62863384065.pdfIn PDF document text
    • http://zonweringnederland.com/ckfinder/userfiles/files/99724647645.pdfIn PDF document text
    • https://newtech-utm.pl/userfiles/file/mafogurujulumonetara.pdfIn PDF document text
    • http://www.melloecastro.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef6493ed57---11788701134.pdfIn PDF document text
    • https://mamo-tato.ro/userfiles/file/notukorasukizogovemojode.pdfIn PDF document text
    • http://delawaretravelmedicine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091fb187e8fc---79961890396.pdfIn PDF document text
    • http://formel1vermietung.de/userfiles/file/bujeroranurifez.pdfIn PDF document text
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/c7359d27dbd386388013fcb44cbd1f36/momapavimogozoranufi.pdfIn PDF document text
    • http://ahlhy.com/uploads/file/012050281783.pdfIn PDF document text
    • http://wsm.hk/images/files/rezolowuw.pdfIn PDF document text
    • https://myvideoclasses.com/ci/userfiles/files/sotakelukopexerimajupuk.pdfIn PDF document text
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/2f0po1qfv7uppe0qemrjblr002/namosakiminafopazozuliko.pdfIn PDF document text
    • http://aaronandanthony.com/userfiles/files/butugojajegu.pdfIn PDF document text
    • https://123natura.com/stockages/files/xenoxobiwa.pdfIn PDF document text
    • http://wypelnienia.kratex.pl/wp-content/plugins/super-forms/uploads/php/files/caaaac2ea1306498edd16816b900f4d4/93846062756.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf017a06cc---6161096853.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=crash+bandicoot+psx+pcPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018062.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18062 10708 bytes
SHA-256: 97452e72f601b348da2ceb765f7cf84d9be558193a31c34bdaba9ffe931c78d6
font_01_sfnt_off000198ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x198AB 3024 bytes
SHA-256: e217e15c482cdec943c073b4c068002055068230110d0cf59d725adca9915a9a

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