Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e06c26c04a6c435…

MALICIOUS

PDF

85.6 KB Created: 2021-07-03 06:25:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 55e2ac8bc6263fca99d3a399a34d7bef SHA-1: 5b730db600c211c02d6ecd4659049febba328b98 SHA-256: 0e06c26c04a6c4354b689fdfbebf1c14fab639890b29e60ea999535994b14dc3
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites or disposable hosting, indicative of a link farm designed to lure users to malicious content. ClamAV detected this file as 'Pdf.Phishing.Trojan', and ML classification strongly supports maliciousness. The presence of a URL with 'robux hack 2019' suggests a potential scam or phishing lure.

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://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/mk1hjcg9koq9f2o0nk3q52tsu6/53688771488.pdf In PDF document text
    • http://navigator-nsk.ru/userfiles/file/20368045954.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/2decaff73d80e4c5677296a91f34d9ea/41885705260.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/or8ttho9ipshrcmblu2arbo68t/xemigafup.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/6576865302.pdfIn PDF document text
    • http://decaiyun.com/upload/file/2106231021255239186fprmzb54wh2.pdfIn PDF document text
    • http://leaguengn.com/userfiles/file///velirezov.pdfIn PDF document text
    • https://cowichanmusicfestival.com/userfiles/file/zetinusiguxevibavifok.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/2fb204679edb6ef2e8dc5234de12849a/luwurotupofejok.pdfIn PDF document text
    • https://www.mii.net/wp-content/plugins/super-forms/uploads/php/files/be3ac5b0d4c6b3c326f72f78c5226d43/mopatuj.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-5-24/20210524215724123897.pdfIn PDF document text
    • http://babamoleskine.com/files/file/jukejukafogebabudoremozag.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2223c34f27---gawovejegoxeseni.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160afca547db5e---31349836036.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b99fa0154b5---53680398411.pdfIn PDF document text
    • https://pharma-tools.eu/galeria/file/budazegonokutirigetanope.pdfIn PDF document text
    • http://baloneacessorios.com/_upload/file///23935458667.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16090e8337d681---rerowotevineje.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/fb9e2b652bd25e03bb660dc754661aba/davovavodaxeg.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160849b51c50ac---taxeletomekotoviji.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/357cf03d2443fdf7254f51a250666e29/jidumafepokipor.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609079497a0b5---napukizejegijumevuwa.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dc7549df74e---vaxikurelug.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/qiff4j2spb9sqbfihhbj8gee10/wuwabezasulotabu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=robux+hack+2019PDF 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_off0000ec10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC10 17160 bytes
SHA-256: 307048e48a7969b8989c8e131f6925c55f994c25e50328f8f8b97fae8fe56296
font_01_sfnt_off000118be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118BE 10528 bytes
SHA-256: 54b91079b80a518c221bbb9d0569af040c8fcab509c212b593c4195ed5afdf10
font_02_sfnt_off000130f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130F9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1