Malicious PDF — malware analysis report

Static analysis result for SHA-256 69f4158874f0bba6…

MALICIOUS

PDF

120.6 KB Created: 2021-09-02 14:29:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 22cb0894cc4e41ad42dd76414f04aa1f SHA-1: b3bdac59df958499d0c61971cfaa5d203ee94319 SHA-256: 69f4158874f0bba6ce4bf7d7af7f3d356c74ea555a07ef18beee6beec7b56a13
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains embedded JavaScript and a significant number of external URIs, many of which point to compromised WordPress sites. These links likely serve as a link farm to redirect users to malicious or phishing content, a common tactic for distributing malware or stealing credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607ea77ee897e---64069734920.pdf In PDF document text
    • https://pima-alarms.rs/slicice/file/lidasurefe.pdfIn PDF document text
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/ce28e2c989d6cfce3f02a0393900c876/9631594768.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607887c5947b0---98480430141.pdfIn PDF document text
    • http://ahxxzx.com/userfiles/202105/file/nedinelufojawa.pdfIn PDF document text
    • http://intrinhgia.com/admin/webroot/upload/image/files/gejatas.pdfIn PDF document text
    • http://kaizenlife.com/ckfinder/userfiles/files/kolufovepimikuwirogukafaw.pdfIn PDF document text
    • http://cowmoo.org/ckfinder/userfiles/files/91766283826.pdfIn PDF document text
    • http://trevelsi.ru/ckfinder/userfiles/files/furexosusiwozigexoxofaw.pdfIn PDF document text
    • http://haiqi-machine.com/d/files/sokubow.pdfIn PDF document text
    • http://mkngsp.ru/upload/files/wafovemuk.pdfIn PDF document text
    • https://rockyshairsalon.com/wp-content/plugins/super-forms/uploads/php/files/ou4u1scsmkn8p4skmf0v9dhqkb/xaxukagenuzemivupobuvu.pdfIn PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/160adac5050473---bipivufadusu.pdfIn PDF document text
    • https://cafeau1ait.xyz/js/ckfinder/userfiles/files/jobepufiruzam.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/2580b5608ded55fd9ea55e7455ba9f07/vudopodebafimulu.pdfIn PDF document text
    • https://ficsllc.com/wp-content/plugins/super-forms/uploads/php/files/kigvs4c6e9ucgj20490oo1jkip/tojimabodalowij.pdfIn PDF document text
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/160f8b3ce14d3d---18963655381.pdfIn PDF document text
    • http://fsgzb.com/upfolder/e/files/20210803141511.pdfIn PDF document text
    • http://movietek.vn/hinh-anh/files/vurivigonimupu.pdfIn PDF document text
    • http://analogsys.com/uploaded/file/154706739060bd151f668c8.pdfIn PDF document text
    • http://hiroi-es.info/yamituki-n/uploads/files/guvem.pdfIn PDF document text
    • http://bmfjhjk.friend-match.com/upload/files/96107603060.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=lspdfr+callout+manager+failed+to+startPDF 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_off00016c18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16C18 11020 bytes
SHA-256: 687a276841815af41c600d521bd3a9bf4d3617cf040fb522084802d608e4b367
font_01_sfnt_off0001857a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1857A 20856 bytes
SHA-256: 61bbc92417b1f58b8a8a87ebf4ca426235e4bc1e14a6d5e16772f4a50f54c13d
font_02_sfnt_off0001bc48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BC48 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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