Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc7ba3c4f3c1101c…

MALICIOUS

PDF

84.7 KB Created: 2021-06-29 10:12:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1e80dec8c1d4e293a53385e55a6726df SHA-1: 36034d8b53bac530e611e8214313a2eee2fc4d22 SHA-256: cc7ba3c4f3c1101cd8503d4c9bf552e49fac74390d60fc16d8c10b45e990c00e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm with numerous URLs pointing to compromised CMS upload storage, suggesting an attempt to distribute malicious content or phish users. The presence of multiple distinct hosts and the use of UTM parameters indicate a coordinated effort to lure victims. No scripts were extracted, but the overall structure points to a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • 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.
  • 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://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2bdc4b0730---mujufi.pdf
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/2db9972ff3759fbc032253ed154f3069/28711802396.pdf
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607d0f54c0d36---bupolam.pdf
    • https://kurtoglumob.com/upload/file/93074118692.pdf
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/u35ght9qrdr2sftc1nq6q2bbir/pazupomem.pdf
    • http://aaykpn.com/uploads/editor/files/tixetexem.pdf
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16080f9b401ba2---bikovemafelobagomagasol.pdf
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/b66ffc148bc8662a72f6460a08774ebb/25218584173.pdf
    • https://mytopics.it/uploads/file/peburulisirox.pdf
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160999e6bb8665---getimewonafevajox.pdf
    • http://szentimresiklos.hu/upload/file/vodid.pdf
    • http://trimblehighalumni.com/clients/84492/File/97394587071.pdf
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/160848d7547d05---kagizavekane.pdf
    • http://www.sphotobooth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607255e8cca20---77063570239.pdf
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/thqjf86emcusa6851tbcm2f99p/zutabapovesadomanagamib.pdf
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/59548093af0ab262e114d4e2b6745abf/pesejizedizukeniwidejape.pdf
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/5eaa7fd528584de555b978633a8a40dd/48693891021.pdf
    • http://www.annaleehuber.com/content_files/file/66899067279.pdf
    • http://csc020.com/userfiles/file/20210628214521_fgk695.pdf
    • https://ringid.vn/ckfinder/userfiles/files/64158108813.pdf
    • https://lionkingbali.com/uploads/file/pukudize.pdf
    • http://fygl.net/uploads/file/200428515625.pdf
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/jjojrm0p5983creogb576go38i/bifarusakinevij.pdf
    • http://tsrmmessina.it/userfiles/files/72887175866.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=s+phrases+speech+therapy
    • 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_off0000ed5e.bin
380112caef9768405cdd80faecc5e6a376248eb6738eb5fc612d5c9deb4bcdc6
pdf-font-stream PDF embedded font (sfnt) at offset 0xED5E 15828 bytes
font_01_sfnt_off00011622.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11622 16792 bytes
font_02_sfnt_off00012e39.bin
9de88e28288a6acd8ac2697289458cf49563a42b36e75a14ad98dfcde9c69ca2
pdf-font-stream PDF embedded font (sfnt) at offset 0x12E39 10300 bytes