Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc2bc23e91f14f1c…

MALICIOUS

PDF

90.6 KB Created: 2021-08-13 17:32:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: cc0ec82b02188f90669a044e678704c3 SHA-1: ec0297570387b8a8aa6793b15ef3c711fc160c74 SHA-256: cc2bc23e91f14f1ca355419387b9ff63f4cd9c5a46cd27bfe67c33504e999359
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting, suggesting a phishing or malware distribution scheme. The document body is heavily obfuscated and unreadable, providing no direct clues to its purpose beyond the heuristic findings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/a0debe88c8934c960ff23381b10a7b4e/mavegilunukawoteteniz.pdf In PDF document text
    • https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/1e7b58b651ff6bdc2d7bb4d144be140a/bagutodatuduseviwevipawiz.pdfIn PDF document text
    • https://steklo-shik.ru/userfiles/file/fanimojelevivaxafa.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/160a49f183fa54---remojebajozefatu.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/zusowinikilanudominevej.pdfIn PDF document text
    • http://garderoba.sk/images/_file/88975841423.pdfIn PDF document text
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160951fe0a17b3---weropobibalu.pdfIn PDF document text
    • http://immobilieninvestors.de/userfiles/file/37481996507.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad80fc1c9d0---mizisijasarekakusodena.pdfIn PDF document text
    • http://montaze.org/democms/userfiles/file/wazinaxisaji.pdfIn PDF document text
    • https://mziagroup.com/wp-content/plugins/super-forms/uploads/php/files/c6qbftqu7obnb1crem46oh96t6/lasuriwowadu.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160904613a6926---79314672007.pdfIn PDF document text
    • http://zonwering-belgie.eu/ckfinder/userfiles/files/butimupalu.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160f18a331d9f3---64083051751.pdfIn PDF document text
    • http://bright-inter.com/file_media/file_image/file/kajewifobuzurubaxiv.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607770f681b75---sijilediki.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/k441pdeg2tkc1e80uddd6i2uo7/96650140540.pdfIn PDF document text
    • http://akpanlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/60739621678.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/160823eab8319c---78335966368.pdfIn PDF document text
    • https://soechi.com/userfiles/file/lapubalolukodibemus.pdfIn PDF document text
    • http://kusadasidentalclinic.com/img/userfiles/files/dabujiguraferudifufegiwo.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/vtgo1eck18dqbk21abfdugrlr1/53038828484.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/79304311c7216f2b0ace2700f8d38b00/15907129005.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c9be452c8a0---jogezegevejawozexusutew.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/bufslqtg64i4u0fekda0cpbipb/10171726009.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=%C3%A9valuation+fractions+d%C3%A9cimales+nombres+d%C3%A9cimaux+cm2PDF 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_off0000f902.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF902 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011119.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11119 11320 bytes
SHA-256: bc4ec0ebfd6146230ec65ae1105bdfe7e5ca90436c52b9a3a3841764ed4bf2d1
font_02_sfnt_off00012b7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B7E 18544 bytes
SHA-256: 272b2976e1df24f4b3edf19af7062c78ca899382a992ff59f11e00e053b38c32