Malicious PDF — malware analysis report

Static analysis result for SHA-256 64a00ab2c89a87e0…

MALICIOUS

PDF

80.3 KB Created: 2021-07-24 23:46:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: ec0c3fd2505da241a8685718fe4203fc SHA-1: 47782ae4c651e4d28969fdf9ec3d1a5947bc15fb SHA-256: 64a00ab2c89a87e09b02e4c9f7937f506ec31779e0de94b9081b76bda75d6fda
156 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains a link farm with numerous URLs, many of which point to compromised CMS uploads or disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://kingsfinancialconsulting.com/userfiles/file/demagotivuw.pdf In PDF document text
    • https://takipcisec.com/calisma2/files/uploads/79988369876.pdfIn PDF document text
    • https://leavereview.com/customerinterview/ckfinder/userfiles/files/31562346361.pdfIn PDF document text
    • http://ozkayalartrans.com/userfiles/file/32039422805.pdfIn PDF document text
    • http://atthaya.com/file_media/file_image/file/tufuligel.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160fc1f6a46081---pevotoluwigafotizekageso.pdfIn PDF document text
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/05m8o801adf2jhhgc6sqfo8u16/25940544538.pdfIn PDF document text
    • http://schooldistrictservices.com/clients/f/f6/f6ab1571d2cdf5e569af7b76e288b17c/File/nurodomegotejovonopez.pdfIn PDF document text
    • http://yesilderecine.com/admin/editor_resim/file/32113501276.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/da1d01501ce43f79e5231315cfd65380/dumesavetarojupelukuxor.pdfIn PDF document text
    • https://www.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/28dd5dad6cbaa96a43dcc364ba413224/11703049338.pdfIn PDF document text
    • http://a-swiss.com/upload/userfiles/file/jozupokafule.pdfIn PDF document text
    • http://rocincorporated.com/domain.com/images/dynamic_pages/file/80302869496.pdfIn PDF document text
    • https://anfauglir.com/images/file/lemojokasobimixowarez.pdfIn PDF document text
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/gkcc0ojojn48bjo9g7pdrctlug/modutabesufolitapofukete.pdfIn PDF document text
    • http://www.alex-vasilkov.ru/images/wisdom/file/tikureduwituweju.pdfIn PDF document text
    • http://biosurfest.com/userfiles/files/vebusexobalawafegasoloviv.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607000682c72f---57419275812.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/jjfvbjhnteaod2p99f19c6hu02/77546871296.pdfIn PDF document text
    • http://alwaditrading.com/userfiles/files/sutenevunekenagobotax.pdfIn PDF document text
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/d982114d827d314fd0186505f43e9d7f/15995116522.pdfIn PDF document text
    • http://gasthaus-steinkirchen.de/img/editor/file/xuxoxi.pdfIn PDF document text
    • https://avonsteel.com/UserFiles/file/37924946348.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=facebook+lite+apk+download+latest+version+2021PDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5C1 11164 bytes
SHA-256: 96ae3a330936cb56267ff78efd2c050c35b55e5ca0123abc3310c41c4ad8e066
font_01_sfnt_off0000efe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE2 16360 bytes
SHA-256: e8a4dc86f646740cceb4fe07cb745726ee6cf2d0f79600203b45779b02301675
font_02_sfnt_off00011a7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A7E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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