Malicious PDF — malware analysis report

Static analysis result for SHA-256 7302e5fb845d51b1…

MALICIOUS

PDF

82.5 KB Created: 2021-07-10 01:17:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4272580468774c53124090a013898311 SHA-1: cc8ce3100d1d6e6f20bdf6b878db5825cbcb1ead SHA-256: 7302e5fb845d51b17f29032d6fe8e71899dce390bb3db1a68aa0365bd4dbc144
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to compromised WordPress sites, suggesting a phishing or malware distribution attempt. The presence of embedded URLs and the nature of the heuristics indicate a likely attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af413a6aa5b---zufozudug.pdf
    • http://www.anieliasfx.com/uploads/textareas/file/50712375423.pdf
    • http://oaklandscreche.ie/userfiles/files/pufupawimemap.pdf
    • http://aircond.md/upload_fck/file/duvidemifisegiva.pdf
    • http://uro-medical.pl/zdjecia/fotki/file/rirekulepuxexibipi.pdf
    • https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/7ef6c73e0099b2b53fda95d17b203afc/vedizivapiranuwuwi.pdf
    • https://atamergranit.com/userfiles/file/97148629773.pdf
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a44af13d1ca---92272628135.pdf
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b65a46a8614---94912435848.pdf
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/16079df662504b---2122614996.pdf
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/4c6ce493b5ba3f9100ee096d9179261c/43962946672.pdf
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/bffnjnrcg4rl8l7spfrqj6p3k3/zezak.pdf
    • http://sumnerclassof1976.com/clients/4/49/49b54eafcc86ae0c30eb104ab8b91c7c/File/komabojor.pdf
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c9b3ade8db5---towusuf.pdf
    • http://asustainable.com/global/file/11738101545.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dfb3ce98a75---68457869554.pdf
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/0dd098933ad25586f5fc08347431d8ff/68831055209.pdf
    • https://autotrans911.com/thread/admin/uploads/file/12646103201.pdf
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/0fotll99563kjafjnidpg29dp8/79113497851.pdf
    • https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/i0im43iav4h2b40em5jlbgjn82/navevaruvarejufe.pdf
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f17c4c43dd---fominivimisoni.pdf
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160899065e5153---18479621582.pdf
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/arlt4jb99pgphf7gjmv3c01ln5/ligurafu.pdf
    • https://davebakeragency.com/wp-content/plugins/super-forms/uploads/php/files/9379fbfe2427e6b4ff026a6cc0dbd83e/tivugawo.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=a+seat+at+the+table+bookstore
    • 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_off0000e19a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE19A 16792 bytes
font_01_sfnt_off0000f9ac.bin
1e6f3633c759d0b3f85ee793697f88f258abd05e98158acf3be63634f1d4d75b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9AC 17380 bytes
font_02_sfnt_off000126ea.bin
dafc6801294c0c84b4ea8018bb7cbb1f09a8b1c5e8b36117d6f91ddc45f4ceaa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x126EA 10220 bytes

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