Malicious PDF — malware analysis report

Static analysis result for SHA-256 7180df21245e57d1…

MALICIOUS

PDF

84.6 KB Created: 2021-08-19 16:07:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: ccbf4a3e700d4809c09e6ed3ce4fd4a3 SHA-1: 97a628a1aabdfc74f28c2a7a18676a1bb4511d33 SHA-256: 7180df21245e57d12e97192f7cac0f973b627be2d93b2d14f4155acd17e8d659
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics as a link farm and a potential phishing or malicious document. It contains numerous URLs, many of which point to compromised WordPress sites, suggesting an attempt to distribute malicious content or phish users. The ML classifier and ClamAV detection further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8668

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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c0ba11d249a---gexulevajuwanusepo.pdf In PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/1b9bcdb5d30e1d6bb60783808d34e343/binevitan.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094c8cee7f0b---bexowunujazawaki.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/ed0330c3ef88ae41363485f7864d9369/79979294556.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/6743908511.pdfIn PDF document text
    • https://noithatkuongthinh.com/uploads/files/14301262325.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/5cec75c642a47b50ce35c22926e1d414/ropijurupurupixadijefakon.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/e72cf27cfaaaaa59c2970db48169d0e3/rabemewosurisosijovo.pdfIn PDF document text
    • http://bayzones.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/97223008141.pdfIn PDF document text
    • https://travelsafeway.com/userfiles/file/89281194645.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/9204c725800a971b70bb1e7818d71562/fefeb.pdfIn PDF document text
    • https://bnovum.hu/downloads/kodokupujegalopi.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1070b424bd---sapugedebanodafisa.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606c914e100cb---zaramopesovumodifu.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b58700c9c8f---puvezakigi.pdfIn PDF document text
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/16078569e2207b---norolenapikivi.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/l0kqv0rdh38hngu76oies5nr28/15900396102.pdfIn PDF document text
    • http://hoadondientu-ptp.vn/images/ckeditor/files/tamutibagaximavifuto.pdfIn PDF document text
    • https://ytdrive.com/CKEdit/upload/files/26396524263.pdfIn PDF document text
    • https://protechlighting.com/wp-content/plugins/super-forms/uploads/php/files/13c8f2cfc9657cd8e40e7559be988a1d/gokol.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606db377b8ed1---29290011095.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/6c00b68fee530f5fe08716fe8cda4459/vonajulubuwiteniku.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/5dbc9a8a4b2ded1e054a1a4cfd1251c6/37279761633.pdfIn PDF document text
    • http://harasim.cz/uploaded/files/31702008779.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=passe+compose+vs+imparfait+worksheet+pdfPDF link annotation
    • 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_off0000f0f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F7 10980 bytes
SHA-256: d1923759153158eebfbfca268e47febf36e1aa4ba2828a05db10e404ebf3c56b
font_01_sfnt_off00010a8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A8D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001229f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1229F 18112 bytes
SHA-256: caca665a364a512bc8be832a17daf5a6d834ee1a84ae955c38dfd7a7375c56a2