Malicious PDF — malware analysis report

Static analysis result for SHA-256 70b189be82a8b220…

MALICIOUS

PDF

84.3 KB Created: 2021-07-13 02:13:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 776365a038ff6f25b20b5c03a4990bda SHA-1: 1f8295a7aab6acd4d0c23621e66392785d60e2e6 SHA-256: 70b189be82a8b220a01c772c09bc42fc546a4bf99378fda0db8160a470690666
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicate a high probability of maliciousness. Heuristics identified it as a link farm pointing to compromised CMS upload storage, suggesting a phishing or malware distribution lure. The document body is unreadable, but the presence of numerous external links and compromised hosting indicates an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2d207b6dab---43062216722.pdf In PDF document text
    • https://506hlapeta.com/files/file/togebavoto.pdfIn PDF document text
    • https://vicotelecom.vn/static/source/images/file/6783307780.pdfIn PDF document text
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/052e3e53a1e904198c73915ee9386536/73719883108.pdfIn PDF document text
    • http://namngonviet.vn/user-/files/xofixunanolikuvixinira.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/62332b335d50fc4109a6d7daee4cdf23/wobodebejuvegijulejed.pdfIn PDF document text
    • https://irastuff.com/admin/ckfinder/uploads/files/70528637686.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16079cfbf6a9c9---wivetesonowewurewobe.pdfIn PDF document text
    • http://skybuildinfraprojects.com/uploads/35832147565.pdfIn PDF document text
    • https://plagij.at/ckfinder/userfiles/files/mowimib.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072aa55c6be4---41341494615.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/1607c745bc108f---44707493696.pdfIn PDF document text
    • https://afmiletisim.com/resimler/files/44394544240.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/1sgql6psgst0h4fsp82ervv74i/88004185702.pdfIn PDF document text
    • http://urbancollab.com/userfiles/Proj_Name//files/sesodesenukaradowa.pdfIn PDF document text
    • http://xn--rssx31a7tec6p.com/upload/userfiles/files/20210706185810.pdfIn PDF document text
    • http://sanarina.de/ckfinder/userfiles/files/32120475523.pdfIn PDF document text
    • https://glbtrader.com/userfiles/file/70077904486.pdfIn PDF document text
    • http://prospekt-rostov.ru/ckfinder/userfiles/files/19049872953.pdfIn PDF document text
    • http://nemdanangpho.com/uploads/2021-05-29/images/files/pugenagipajelumemalet.pdfIn PDF document text
    • https://apoiotelecom.com/imagens/img_fckeditor/file/45764070199.pdfIn PDF document text
    • http://kurskodkb.ru/page_edit/_samples/userfiles/files/tadujimodorogimupuvupuwo.pdfIn PDF document text
    • https://aradmissions.com/ci/userfiles/files/85609169401.pdfIn PDF document text
    • https://kme.pl/global/app/webroot/uploads/file/16233510860606.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081307c240de---refufunobivan.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=ease+wisdom+tooth+painPDF 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_off0000e696.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE696 17184 bytes
SHA-256: 3a883af3846b5bc57037fea98edeb5e5abae2ad1785551146eeab134ccecd9b2
font_01_sfnt_off000113a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113A6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012bbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BBD 10580 bytes
SHA-256: 132c210a6bc948c92c0183b6031aa5d5d7498ed5eafba5bb06449127a19e2a76

Open this report in the interactive analyzer, or submit your own file for analysis.