Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d60eaa7b7d7d723…

MALICIOUS

PDF

70.2 KB Created: 2021-09-29 12:13:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 5ff33791cc2248b2cd8a951d79dd70d7 SHA-1: 62dc934a85a170827a8de95a5b8481ef405b8d37 SHA-256: 5d60eaa7b7d7d723d8b8cd45fd837819dacdbfa74f5069c9827ae89200a520c7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing or trojan distribution. It contains numerous links, many pointing to compromised CMS uploads or disposable hosting, disguised as download opportunities for software like 'premiere pro full crack'. While no scripts were directly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to malicious content, likely leveraging JavaScript for execution or further redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9837

Heuristics 6

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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 http://secureyun.cn/uploadfile/file///2021090912342229.pdf In PDF document text
    • http://xn--b1adbbbaeqjtsflbfms0e.xn--p1ai/pict/file/rezudobowoda.pdfIn PDF document text
    • http://batiment-tunisie.com/userfiles/file/fusikemalaxeraguwin.pdfIn PDF document text
    • https://alpinashop.rudy-ra.com/files/68755945254.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-9-11/20210911111919754964.pdfIn PDF document text
    • http://e-skala.pl/userfiles/file/zujokofoxodexajusinuf.pdfIn PDF document text
    • https://bhiringisamsankalimandir.org/userfiles/file/19624102652.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/161517307c4390---gifafinotofinowaropaz.pdfIn PDF document text
    • http://genarchi.com/data/temp/file/46392851896.pdfIn PDF document text
    • https://smartcirclegroup.com/userfiles/file/79951854222.pdfIn PDF document text
    • http://uniradioweb.info/userfiles/files/kelubix.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16142d0340ca2a---tomijirobar.pdfIn PDF document text
    • http://aucoindeshalles.fr/menu/file/kanizelavewodunawi.pdfIn PDF document text
    • http://apartamentykunickiego.pl/architekci/public/upload/ckfinder/userfiles/files/5550705960.pdfIn PDF document text
    • http://firegallery.ru/img/upload/kitexunir.pdfIn PDF document text
    • http://metallpress.ru/files/xonewogemafakiwanelubix.pdfIn PDF document text
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/ag2et7fqjnulnpk9lt9gdugjpe/tojotasinolutu.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/16137641530650---lenewebebesomor.pdfIn PDF document text
    • http://derivat.sk/files/10469131314.pdfIn PDF document text
    • http://kerama.altrodesign.eu/ckfinder/userfiles/files/nudeluponigedegotinu.pdfIn PDF document text
    • http://lexxyin.net/files/fckeditor/file/vojunekojufus.pdfIn PDF document text
    • https://rtvpuls.com/ckfinder/userfiles/files/pejuxob.pdfIn PDF document text
    • http://franklcalabreseattorney.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/waliluvipotajotew.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/1614b0ef21f55f---bidamodabesaromonim.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/29ae4241d87640842f9f6accbbabd7de/89029838267.pdfIn PDF document text
    • https://www.azulejositurry.com/wp-content/plugins/super-forms/uploads/php/files/eo1jqr19kirhcqai7ltgtk7u86/politidewamarufotoxetugaw.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/6e8a0561d917aa5b720f80b70d16f4f6/58820648173.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=download+premiere+pro+full+crackPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • 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_off0000b558.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB558 10796 bytes
SHA-256: 8380e1c1d438bd6954190f7609162596b96190aa0b57d21b6489a2ec06fef334
font_01_sfnt_off0000ce2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE2D 14696 bytes
SHA-256: 9db7b934a3f5046f0d435c976fbdfdc2d99880e2ec295c41ef000745c3278cbd
font_02_sfnt_off0000f31d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF31D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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