Malicious PDF — malware analysis report

Static analysis result for SHA-256 2960fa63a9119743…

MALICIOUS

PDF

79.6 KB Created: 2021-08-01 23:41:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 5848c856d40b865e6781d581965ad342 SHA-1: 38ba9629fb588f119384508f38020dc0ad956525 SHA-256: 2960fa63a9119743306416c2e4acadc999f8afa4cbfbade654adc9a4b90b8944
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/aka88qmaddfhnrpn40s0q4lv86/runibizejeg.pdf In PDF document text
    • https://tavio.ru/files/file/79664679665.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b7c31e9de2d---gagajuxuvexedogax.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/3v63pd4r0r44rriifjfqbqem9l/85480046744.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/tf2pf5bbli80k0i73c69vbunbp/zewid.pdfIn PDF document text
    • http://agierresrl.it/userfiles/files/gozeve.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4235b4dcb2---57421549037.pdfIn PDF document text
    • http://myjobcareer.net/userfiles/file/2021062302195773499.pdfIn PDF document text
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/c7922ea8281f3606020bc11e580e2373/31086806730.pdfIn PDF document text
    • https://grouptm2.com/contents//files/97092726405.pdfIn PDF document text
    • https://austarpharma.com/upload/files/zogunedaferep.pdfIn PDF document text
    • http://psychologkmalinowska.pl/ckfinder/userfiles/files/fejusafesibogujosuvel.pdfIn PDF document text
    • http://baobianhkhang.com/upload/files/2210532704.pdfIn PDF document text
    • http://jucal.es/images/file/88611609497.pdfIn PDF document text
    • http://hotelgiottotorino.com/userfiles/files/54131187276.pdfIn PDF document text
    • http://hosungtour.net/FileData/ckfinder/files/20210630_A4CD65DF5F6FCDB2.pdfIn PDF document text
    • http://brilspa.ro/userfiles/file///76016889425.pdfIn PDF document text
    • http://thetsaban3watnuea.com/UserFiles/file/sibubunetenibigi.pdfIn PDF document text
    • https://cdpu.net/wp-content/plugins/super-forms/uploads/php/files/1d0c1dbe173017e1af3ffce87b441fb2/felisegawupetolovefuxedex.pdfIn PDF document text
    • https://tnmkor.com/FileData/ckfinder/files/20210705_75EA52D88A2D6061.pdfIn PDF document text
    • http://midel.me/userfiles/file/zivaregowi.pdfIn PDF document text
    • http://abbwingslynnhaven.com/uploads/files/14359181328.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=airconsole+hero+apk+free+downloadPDF 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_off0000cac4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAC4 20012 bytes
SHA-256: 0f2914577e5a8ee254b3d87a50a5e4a95770b227f189365b1032ca5b1dbbbd73
font_01_sfnt_off0000fdcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDCC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000115e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115E3 10780 bytes
SHA-256: bad6f1ae8b842d1b897b54e938141ab463620196a43a957bf9aaa3b864dd4aed

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