Malicious PDF — malware analysis report

Static analysis result for SHA-256 68f49ce338c36d11…

MALICIOUS

PDF

67.4 KB Created: 2021-09-05 15:47:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: b2d0889949c43228b200cdc5ed451b18 SHA-1: ba06d2065343c615a9617bc6f127edc9debcac16 SHA-256: 68f49ce338c36d11d1276a7a16151738909ca712bf7aaea7b74769807f3932c1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it functions as a link farm on compromised WordPress sites and disposable hosting. The embedded URLs, such as https://oniceh.ru/uplcv?utm_term=undang+undang+ketenagakerjaan+thr+pdf, likely lead to phishing or malware distribution pages. Although no scripts were explicitly extracted, the PDF structure and URL patterns strongly suggest a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5479

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://oniceh.ru/uplcv?utm_term=undang+undang+ketenagakerjaan+thr+pdf PDF link annotation
    • https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/570e0916da018ad4ca8b8c45d3c446cb/21986869390.pdfIn PDF document text
    • http://tuderprogettazione.it/userfiles/files/dipefip.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7a385f657---litekesara.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/3deb5b038bd77305717d4914dc2d7583/poromapetovid.pdfIn PDF document text
    • http://thesprotia.gr/uploads/file/guremigirixexulux.pdfIn PDF document text
    • http://littlepearlbooks.in/data/eimages/file/rapavepupagi.pdfIn PDF document text
    • http://mvsexpo.ru/admin/ckfinder/userfiles/files/loxidonojivimibufukog.pdfIn PDF document text
    • http://goldendazzle.com/upload/quangtri/files/35159834152.pdfIn PDF document text
    • http://waypl.pl/upload/File/59942946577.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a3900891fdd---suvetibajeduwezifu.pdfIn PDF document text
    • https://kltccompany.com/ckfinder/userfiles/files/nurabem.pdfIn PDF document text
    • http://solamsys.com/userData/board/file/80168694442.pdfIn PDF document text
    • http://www.moyekolodin.com/files/99328897708.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b20334b591c---vufuvazoxewaka.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b236eb9aaed---18881728776.pdfIn PDF document text
    • https://daquin-ferriere.fr/userfiles/file/17717380508.pdfIn PDF document text
    • http://streetnn.ru/data/upload/ck/files/80945353024.pdfIn PDF document text
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/c1409829470d0bb0a626aaf26434d8bf/34243229056.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/4mkqtoltkeo43hp7ftecrmtfvj/xojemavijab.pdfIn PDF document text
    • http://de-ko-gmbh.com/ckfinder/userfiles/files/kejurobateru.pdfIn PDF document text
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3d59aa889b---zugaketatevurebexitigo.pdfIn PDF document text
    • http://world-housing.jp/ckfinder/userfiles/files/27361642568.pdfIn PDF document text
    • http://celcg.pl/uploaded/file/fapagopuguja.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/qn2uijjie114lfddh4e8h3t86i/70556038995.pdfIn PDF document text
    • http://yoron.net/up/files/wewabowagupobozib.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612c444ce0676---22777215426.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4EE 10680 bytes
SHA-256: c9d4e29b71af05c87989d590f607938845a483f1fe38ac06bb593d9ae30d8fb7