Malicious PDF — malware analysis report

Static analysis result for SHA-256 92e0be5a331c12b7…

MALICIOUS

PDF

99.8 KB Created: 2021-07-01 11:51:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cde64de451ef45ed3f535556bc62e979 SHA-1: e4671fe48b0d46cd07cb2532cda9da69e444676a SHA-256: 92e0be5a331c12b731a854194e28a18525f83b947687215574af761a0d527771
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF containing a link farm hosted on compromised websites, designed to trick users into downloading further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9895

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/2tkdpvg6memkm28n0veikm40o2/88289147160.pdf
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1aa51bc14---96054906076.pdf
    • http://www.abcklima.hu//data/editorfile/futumusudigaki.pdf
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608251ac998db---raxonerugigitabetisupafis.pdf
    • http://pescepiana.eu/userfiles/files/27636702356.pdf
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160888e123efcb---najukeke.pdf
    • https://gites-les-bardots.com/userfiles/file/nifufigezakumejedameka.pdf
    • https://communeouchamps.fr/userfiles/file/25601657096.pdf
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/nnejegkie07fid3i1j02vq1gn1/44284684082.pdf
    • http://bandenplaats.nl/cmsimages/file/nibudadelirefipaku.pdf
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160b7bf794e0f0---vumugaxavuzazedotunolusaz.pdf
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/33e12e3397f8e699f5f9eef7db8a22b3/61925367642.pdf
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/ae5097b914fe0ef2e7240eec1d265600/mifupe.pdf
    • https://langumeistras.lt/i/File/dizididejukut.pdf
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/2ltmquhjmrc9s7p7i5m7m0ajl7/2967923018.pdf
    • https://grandegroup.net/files/58052007605.pdf
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/21052ca8c039515cd7ced0e072386f3e/tuzuguradafida.pdf
    • http://gryfarmerskie.pl/pliki_wyswig/files/40139530865.pdf
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/6ebe1685a8658233d77ce1a545400bc8/nuzob.pdf
    • http://conblocmanado.com/pics/file/68428841299.pdf
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c0bc87e5a9---80977333802.pdf
    • http://tsg-vaganovskoe.ru/ckfinder/userfiles/files/35683466544.pdf
    • http://ranaghatpchsschool.org/userfiles/file/bivedajigosuxirepufoja.pdf
    • http://armanetti.com/images/39584007869.pdf
    • https://bawwabatrizq.com/userfiles/file/woxana.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=ps4+cannot+find+update+file
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011427.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11427 16792 bytes
font_01_sfnt_off00012c39.bin
de39634a4cb564396821c795c05bcbc4c7f82d18f1274efa54635b14c304f548
pdf-font-stream PDF embedded font (sfnt) at offset 0x12C39 18324 bytes
font_02_sfnt_off00015cb7.bin
7f219cb1ce5b9dcec6a37e4ca836a15786d53173573b2c4e03ccdc28a49e23c7
pdf-font-stream PDF embedded font (sfnt) at offset 0x15CB7 2320 bytes
font_03_sfnt_off000166e0.bin
3cfdd080628fca1156c678f68a71a7c757ac8da85a10b9140e6ec9b86e91e617
pdf-font-stream PDF embedded font (sfnt) at offset 0x166E0 10692 bytes