Malicious PDF — malware analysis report

Static analysis result for SHA-256 2269fb1f7a1c50c4…

MALICIOUS

PDF

84.8 KB Created: 2021-09-20 04:47:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: f8f93499db98e9db87797de5094b04d8 SHA-1: 14d61e5f816e4d1b4bd82e4bb3c6a16918e077d9 SHA-256: 2269fb1f7a1c50c44b357cf18cd40da8372c3fcd11ad1783712e1a0eb992daa1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many of which point to compromised CMS upload storage or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://archism.ru/uplcv?utm_term=skill+clash+app+apk+download PDF link annotation
    • https://bearings.vn/images/ckeditor/files/sofade.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161400c95d52fb---16451272201.pdfIn PDF document text
    • http://meimagedance.tw/ufiles/files/36228977517.pdfIn PDF document text
    • http://news-hk.net/uploadfile/file///dujuv.pdfIn PDF document text
    • http://daechienglishpark.com/ckfinder/userfiles/files/tafufujixoziva.pdfIn PDF document text
    • https://movimientofamiliadejesus.com/images/uploaded/file/97906115152.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c8120f9c208b8c3b106f6e742c7b6af8/dekevoxitokulovifavape.pdfIn PDF document text
    • http://ifap.it/images/file/numufu.pdfIn PDF document text
    • http://go-pxl.com/uploads/files/88073376069.pdfIn PDF document text
    • http://xn--80aaeiengkwpz6p.xn--p1ai/pub/file/filomuwupapiwo.pdfIn PDF document text
    • https://protectname.xyz/whoisprivacy/userfiles/files/55982580375.pdfIn PDF document text
    • http://tavaszitura.eu/userfiles/files/61612857779.pdfIn PDF document text
    • https://xn--atpta-nfb.lv/images/userfiles/files/sidudujexedusajewegi.pdfIn PDF document text
    • http://schokozentrale.de/idata/fadeve.pdfIn PDF document text
    • https://bushregenerators.biz/userfiles/files/27075415907.pdfIn PDF document text
    • https://creteservices.com/FCKeditor/userimages/file/bokaworonitukemage.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/2157888d9ca78e20bdaf129f756640bd/xolalutinunitofumo.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/16143aa717e3fe---nunabi.pdfIn PDF document text
    • http://lavalnerina.it/userfiles/file/xaxugazenisu.pdfIn PDF document text
    • https://xn--interpeas-r6a.es/upload/files/53494895984.pdfIn PDF document text
    • https://aalatour.com/basefile/b2caalatourcom/files/92204794792.pdfIn PDF document text
    • http://studioagronomoserragiotto.eu/userfiles/files/57251189307.pdfIn PDF document text
    • http://cameralehiep.com/hinhanh_fckeditor/file/84256667913.pdfIn PDF document text
    • http://abwcockeysville.com/uploads/files/81608938694.pdfIn PDF document text
    • 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_off0000e5e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5E3 18172 bytes
SHA-256: 7f6cca815d3fe045e6488a664d6bb54cd83ba2e58659c44287b7411d08075b68
font_01_sfnt_off0001154b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1154B 10532 bytes
SHA-256: 6cde8fa46acd2062e91972e05d78c52ed2ebd1fcd7443dcd14bfd4f51f9ab316
font_02_sfnt_off00012d39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D39 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1