Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cc8e8904f685828…

MALICIOUS

PDF

68.8 KB Created: 2021-09-07 09:10:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ff552f2789cae5b4aafaf89919142607 SHA-1: 905a0a9c25156a9add87ca02461ef06858cd4956 SHA-256: 1cc8e8904f685828d16f6aede6e28bea9f27ee0e319773d34f3a694ccd6797e0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to various websites, some of which are hosted on compromised CMS platforms. The primary purpose appears to be redirecting users to potentially harmful content, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5841

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://foodvellythailand.com/upload/files/pomakebovobagerulep.pdf In PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078f01b662ac---meratulipef.pdfIn PDF document text
    • http://mardeestilos.es/fotos/file/pubafudokubudadetisuneja.pdfIn PDF document text
    • http://sasolution.kr/userfiles/file/21728000132.pdfIn PDF document text
    • https://radmangroup-ye.com/rgfiles/file/zikodefofizetu.pdfIn PDF document text
    • http://ferrogep99.hu/static/media/file/pezinomadafotawov.pdfIn PDF document text
    • http://henrycrawfordreunion.com/clients/1/19/1929e20d1ffebcad6d8b2a659e9c170d/File/84568431944.pdfIn PDF document text
    • https://webfox.net.au/wp-content/plugins/super-forms/uploads/php/files/3d725284beafe4dd22a3fcf0d79e8d6b/2912398639.pdfIn PDF document text
    • https://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/93bd72ffb5af4a652be8841c6cee9fb2/45255389475.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/be845a6458e2554fde76903aa502d4c6/benuwedadafalumi.pdfIn PDF document text
    • http://knshzj.com/CKEdit/upload/files/jonivododapuxedadu.pdfIn PDF document text
    • http://elcampoeco.org/FCKeditor/file/rodevaronexabe.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acad3f99336---58767253352.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160821e89dde46---wenunuz.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/ih217hls0mr91ffjreb76c42qb/banezixajuzasedos.pdfIn PDF document text
    • http://robwalker.net/fckupload/file/79746010469.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/16128837861b29---11842171029.pdfIn PDF document text
    • http://turagent007.ru/userfiles/file/zevufevevomujogebikovutel.pdfIn PDF document text
    • http://majstrissmt.eu/www-data/file/kezalurokajifab.pdfIn PDF document text
    • https://bostoncake888.com/UserFiles/files/nebudotipibisufarajemun.pdfIn PDF document text
    • http://w-f-l.de/user_img/file/xuxaluru.pdfIn PDF document text
    • http://aplus.to/userfiles/file/rizimufakegejavinanidawex.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=sgx+listing+manual+chapter+9PDF 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_off0000bb6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB6A 11144 bytes
SHA-256: 8ba19648c15f056ff6694ca8ee0f1dfffffa6b4e39d7e0b0c0c92e3a0f5e61e1
font_01_sfnt_off0000d54b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD54B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ed5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED5D 16488 bytes
SHA-256: 56a6c1d2cd36896447f3b127ea08a20ab58a535c84f8388956ea04cc662bbd20

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