Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb03f69309d99809…

MALICIOUS

PDF

85.6 KB Created: 2021-07-18 09:26:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 73dfb9493347c8cf87fccadabd179170 SHA-1: f0fec6f7de5a0900bd6c31cf1fadbe7cc7c5dea9 SHA-256: bb03f69309d99809c0dccb7dcd6479476cdd92de221836ef5b6fe7806b2395d0
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to download further malware or engage in phishing activities. The document body is unreadable, but the heuristic firings and URL analysis point to a link farm designed to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c5f00027ed---lurorowugexurud.pdf
    • http://kompletucetnictvi.cz/files/file/xogaduwaxopipugorirutoxad.pdf
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a28f1927057---bitojilukedokiruji.pdf
    • http://vipforiraq.com/userfiles/files/zewizefekapol.pdf
    • http://krikrik.ru/uploads/ckfinder/files/negatumuzug.pdf
    • https://ankaratemizlikcim.com/depo/sayfaresim/file/9260542011.pdf
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/94ndge7rvtr3dkbp3fc7u6k7o0/42378633982.pdf
    • http://hit-air.pro/ckfinder/userfiles/files/fevabipivurivab.pdf
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/c599e3ddf2c19dd7986859929509bd21/86185758923.pdf
    • https://www.autodepotperformancegroup.ca/wp-content/plugins/super-forms/uploads/php/files/n2k8pnj41nfkmguims78buj010/nolofu.pdf
    • http://tplustech.com/images/ckeditor/files/devepifosolobarotolimamim.pdf
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/eb98ef82fc105784c684907dd9b3a04e/sazinido.pdf
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/2b6150759cdcd87a62f194244a166e21/wodanazijijuwuvonebiti.pdf
    • https://777mto.com/contents//files/24468333926.pdf
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1ecbb014a5---watojewuwaji.pdf
    • http://offerseir.com/basefile/offerseircom/files/17302173454.pdf
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6cf1fb7e7e---fafutejesikugonizaraditok.pdf
    • http://wienbildarchiv.com/upload_files/files/80137231156.pdf
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/11d42cb5bbdb53543a4ccc28acd84dd5/98475079050.pdf
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/160972bb94df28---2777527090.pdf
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/j6or2mp5j173ii4140ktb4t59h/zogiropemuradaresume.pdf
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607182da42b1b---39682743401.pdf
    • http://aire-limpio.com/img/editor/file/19805744738.pdf
    • http://gernano.eu/gfx/userfiles/files/tizironurofubelovamig.pdf
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9c3336e9a6---48775119771.pdf
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/f7c4f0ee4421aafa32251f40fbf23bf6/bumozibaj.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=you+are+my+only+baby+are+you+down+down+down
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edf6.bin
d24d19dd575103a759e247c590e75cb20c117a279d50080452c32b585b0554b3
pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF6 16540 bytes
font_01_sfnt_off000118e8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x118E8 16792 bytes
font_02_sfnt_off000130ff.bin
2507f23a45f20685d42726f85ee891cec0b68256744909a21d1623dc4615177b
pdf-font-stream PDF embedded font (sfnt) at offset 0x130FF 10472 bytes