Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb6111b95f66fcec…

MALICIOUS

PDF

210.9 KB Created: 2021-06-26 04:19:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0c138f6fb17bb118c2f372661a93de88 SHA-1: d6708dbc724801d8ccc46db2585f5abd2f47c7b0 SHA-256: fb6111b95f66fcecde50ad2ca40f2791c6081608321d90062356481a752c37c9
134 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous links pointing to compromised CMS upload storage, suggesting it's used to distribute further malware. The presence of urgency language in the document body, though low-signal on its own, supports the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9619

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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 https://mujeresenmovimientoplus.com/userfiles/file/pitojuje.pdf
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084b0fae1ba9---41949248826.pdf
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071529c9d423---49043010836.pdf
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609df4cf34f22---22938798313.pdf
    • http://project-lovcen.me/userfiles/file/rabamekididofo.pdf
    • https://cambodiaangkorhomestay.com/userfiles/file/22642024048.pdf
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d40328e185a---77436409209.pdf
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/16077356da0827---nifapixakiwavasexiwogikat.pdf
    • https://cplastik.cz/data/cms/file/lojigikijowikabavad.pdf
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/3vs0vbltcjl0uuou7p19at63s9/98349157340.pdf
    • http://accessiblevehicleservices.com/userfiles/file/joxurirefigenuvufif.pdf
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2e54095beb---51824052202.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607bc3ccbb7d1---kunonafusomigugefowutadaf.pdf
    • http://therealmccoyfamilyreunion.com/clients/f/f9/f9ea119420dddc0cc5ac7622830b9f68/File/wesumorazajofubipi.pdf
    • https://www.engltg.com/wp-content/plugins/super-forms/uploads/php/files/b0b92dccc7366bc9243760d7e910cb70/viwabajagik.pdf
    • http://drstevealbrecht.com/wp-content/plugins/super-forms/uploads/php/files/acc294fdc15d56562176cb866a88c4c5/96858980926.pdf
    • http://www.chatanakonci.cz/userfiles/file/tejusixixo.pdf
    • http://parcfamilyreunion.com/clients/b/b3/b3ae52aef0329bb57e848b27182677c8/File/25295027307.pdf
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/e39e5177d35bddae861141689178ce7a/15292361372.pdf
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be9fa263326---30180470502.pdf
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ad9fe3755dc---xetegesamemuboxoki.pdf
    • http://shsuorui.com/uploadfiles/fckeditor/20210622/file/16243554833142.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082841845c37---jutujifumi.pdf
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/v3125htrp4v9tnb4bfmm67je0o/11250958505.pdf
    • https://www.enterpriselighting.com/wp-content/plugins/super-forms/uploads/php/files/c4964111290dc64b8faecd50e78ac616/6055974662.pdf
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/jks2vmd5q3atkl7r56m05t7j45/40652037293.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=love+yourself+guitar+tabs+fingerstyle
    • 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_off0002de90.bin
2c150e3f59fadc3dcd50d8068a90867fb34e1ff339eebb7e1f4e49495eadc54c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2DE90 10768 bytes
font_01_sfnt_off0002f78a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2F78A 16792 bytes
font_02_sfnt_off00030f9c.bin
85b80c9edbfa0d2b84073bfbdf4b26da02eb2da56b3a45bcfdaaf09b038e490f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x30F9C 17816 bytes

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