Malicious PDF — malware analysis report

Static analysis result for SHA-256 cad9fad70d248291…

MALICIOUS

PDF

99.9 KB Created: 2021-07-02 14:04:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 0dfdb9212644fc176bde3c668c863e7a SHA-1: 05f180971f2c4cb5cbefebbbb8f02132b3984d37 SHA-256: cad9fad70d248291eecd66ed420eb270f11046eb0fa011c58b264423360dde24
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to PDFs hosted on compromised WordPress sites. The presence of 'utm_term_redirector=True' and the high number of distinct hosts suggest an attempt at SEO manipulation or distributing malicious content through a network of compromised websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be33e914bdd---nebufubejodotagodarabele.pdf In PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/b2740899e9f36f5026102286a5645910/ruzadipixeliporokemig.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a71387b61ee---2375114441.pdfIn PDF document text
    • https://villadorottya.hu/uploads/frontend/files/subofurejop.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/160a62cfd82b2c---sojenuburozitabedozutu.pdfIn PDF document text
    • https://agrilaui.com/userfiles/file/naxidomulinimejilalegi.pdfIn PDF document text
    • http://colorfulmedia.de/fotki/fotki/file/fejeposi.pdfIn PDF document text
    • http://accessprecision.com/userfiles/file/90043973212.pdfIn PDF document text
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/c0de16381a469bc27eb245cd00a9c7e2/dogafakivo.pdfIn PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/46c953f80037f323371a58d23d0898df/kelitosabevelopanudibaxel.pdfIn PDF document text
    • http://axwelindia.com/uploads/41337016647.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1606ec4b9eed63---14014318881.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b66e56b77db---87792715066.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160be1752db810---53656102393.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/fdcnhi57a7a1hhuah1mpcla2r2/39085893144.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5847ca6d2---3242986127.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d5865abe5c5---lipezapabebovefetugejeno.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/095da5211c86fa20dd831054cbcf6831/zosiz.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/160accaae109f6---76047210137.pdfIn PDF document text
    • http://greatnice.club/updatefiles/file/koxan.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/ov8v15cp2f5q66crktdgnjeh8o/63290593737.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=hypotension+without+tachycardiaPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012373.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12373 17556 bytes
SHA-256: 32551d0e171e4f37f52caf37a761c37b0c38f4fcc874af420e316a46c109a103
font_01_sfnt_off00015177.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15177 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001698e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1698E 10856 bytes
SHA-256: b477000f6272efee5219b1e77bf50ba64a1054375d0b42d38bdf7a6fbefb730c

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