Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6ee8c5ae7a59b2e…

MALICIOUS

PDF

92.0 KB Created: 2021-07-14 08:00:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b8603adb4a3948590e444f2c695c78b9 SHA-1: 3dd73064ecddad7adf961ff63eef24ab76298af8 SHA-256: d6ee8c5ae7a59b2ecf0c93d068a0bb9120e4f262714f9a6c173fd89ae4ef481c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised websites, indicating a link farm designed to manipulate search engine results or redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to host and distribute malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 https://homeuu.biz/upload/ckeditor/pages//files/bojasufaz.pdf
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef64a05823---gasadigapo.pdf
    • http://ufnk.fr/app/webroot/files/file/19434078822.pdf
    • https://www.tristar-technology.com/ckfinder/userfiles/files/lasisavojun.pdf
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a4b1226a04e---54892860986.pdf
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c085cbb1e48---komowozogetovewo.pdf
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160808a30c1908---lujunubixed.pdf
    • https://mls.lighting/wp-content/plugins/super-forms/uploads/php/files/5f5eb2230634ba78c774831b95e88c4b/26432918741.pdf
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094f817d61c1---9406258592.pdf
    • http://zdrowejaja.com/Upload/file/woxefanefefigevu.pdf
    • http://jogforbigt.com/clients/6/61/61f7a61d17da296148a50ccd59c4a139/File/sesidi.pdf
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/c4175a4026ab2ed55fd05e6ea66b596e/gikozato.pdf
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/80d520b736e46f8ab5c38a705ffe5f78/84587256458.pdf
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/33c746de239a7cab4903b57ae8a37971/53684002030.pdf
    • http://allseasonsart.com/uploads/fck_uploads/file/31712094152.pdf
    • https://victorybear-info.com/userfiles/files/90010015562.pdf
    • http://alpanelektrik.com/depo/sayfaresim/file/74817009149.pdf
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/38b9fa4addf3ece040afd79812caf2aa/56890530608.pdf
    • http://countryroadssiberianhuskies.com/clients/e/e1/e1b2222506e4b6fd6c510396e08362d3/File/96436229066.pdf
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/4945c934d30247f58dd1bc6942999ee2/kemosezanizenowovix.pdf
    • http://gayaarchi.com/userfiles/file/20210621044453.pdf
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b242dfdc659---jivibajivujosutew.pdf
    • https://menlopark.com/wysiwygfiles/file/gozumexixalikif.pdf
    • http://chekeeh.ir/basefile/chekeehir/files/xugelonikidomovapubug.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=life+is+so+ironic+meaning
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010564.bin
e507b7feface7bd92a15f63c0c10003aa5ad19c0787dc17c7ec33a6d6fe9907a
pdf-font-stream PDF embedded font (sfnt) at offset 0x10564 17344 bytes
font_01_sfnt_off000132c9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x132C9 16792 bytes
font_02_sfnt_off00014ae0.bin
efbb7e106995c4f38eb67836d0d7860e5bd921e4956aaa2bc3c4136fa49f11ff
pdf-font-stream PDF embedded font (sfnt) at offset 0x14AE0 10492 bytes