Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbb1e625b3d3414a…

MALICIOUS

PDF

90.7 KB Created: 2021-07-08 01:11:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e0ca2d753da20d293b8231d94021442f SHA-1: b0993f21fcf07c43da82b925cf53e7caefaa173c SHA-256: fbb1e625b3d3414a6f12287e3cda5ddffee2a2ec45f1626124fff8a7196b2e92
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ClamAV as 'Pdf.Phishing.Trojan' and ML classifiers indicated a high probability of maliciousness. Heuristics identified it as a link farm, with multiple URLs pointing to compromised WordPress installations and potentially disposable hosting. The presence of numerous links, including one directly to an IP address, strongly suggests an attempt to redirect users to malicious sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/0u025al5cpddgrm6tdtkk1rv02/vupagujel.pdf
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160746d7672f1e---ginedapuwukatipa.pdf
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/85e5c6b27673662f1ca1f56f6b519159/kifamazumivilitom.pdf
    • https://whiteelephant.co.in/wp-content/plugins/super-forms/uploads/php/files/1d2fc94a56881d862811f4dda450eb6d/21050480574.pdf
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a29ce65559b---suwerizajuzusiweloxisew.pdf
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/f2582bd778b0d7f398713a723b89510f/41837860054.pdf
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/16jd5piqg397jtsvjl9soqdcpl/85184591532.pdf
    • http://www.urbanwaterways.info/files/buwiwubizi.pdf
    • http://abacusnancy.com/userfiles/file/56780171687.pdf
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609845313240a---gotiwadolidisibawubonu.pdf
    • http://oumkua.com/userfiles/file/zalideri.pdf
    • https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/5be820c5a5c38658a6540c3d15b25f6c/tomeburupaxalalejamezopo.pdf
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/u0qf0alghk8nt262i2dphssmc4/suvidinudevovo.pdf
    • http://csc028.com/userfiles/file/20210619105920_d7fk46.pdf
    • https://alkalacarservice.com/public_html/userfiles/file/dibasozov.pdf
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e9b17d9d4a---73331811665.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072b5263b01c---30007620216.pdf
    • https://www.varisistanbul.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070411fb95fd---subapenarovi.pdf
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608296eb3e48e---58044119839.pdf
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdfdde53d06---duvazolimuj.pdf
    • http://arcos-eff.it/userfiles/files/berupozine.pdf
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/7ec2331ca3f65f31e97ec5b241e88592/ziwodesugij.pdf
    • https://cristalensi.com/public/File/xopoxaxewafivofakemiw.pdf
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160746bf9d3e6d---23146721478.pdf
    • https://stpeterscbs.ca/ckfinder/userfiles/files/95754149593.pdf
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/820b937549cecd715689fd30ffc421fb/fewow.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=prudent+meaning+in
    • 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_off0000fc27.bin
3ea1d56e0590b53a9981883dd1f444c8fbbe1f89fadb11c6a4772bd4f5e64951
pdf-font-stream PDF embedded font (sfnt) at offset 0xFC27 10356 bytes
font_01_sfnt_off00011343.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11343 16792 bytes
font_02_sfnt_off00012b55.bin
ba5d5c7b58bd88d80571be03509f8ff23074bc3c30de276ac38f2d5612ed1bc6
pdf-font-stream PDF embedded font (sfnt) at offset 0x12B55 18512 bytes