Malicious PDF — malware analysis report

Static analysis result for SHA-256 baec729ef87ee6ae…

MALICIOUS

PDF

80.0 KB Created: 2021-09-16 11:41:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: fd382169d3b388eb43a21bd325378a80 SHA-1: ad79ba1095b7c1d5da7ef75812760acdcf1220a0 SHA-256: baec729ef87ee6ae96f75c5583d1e30018cd63cd96d05929ef9b791d0e7b82ca
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many of which point to disposable hosting or compromised CMS upload storage, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the nature of the URLs and the heuristic firings point towards a malicious document, potentially leveraging embedded JavaScript for further actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://nomylo.ru/uplcv?utm_term=bloom+camera+selfie PDF link annotation
    • http://aroma-es.site/yamituki-n/uploads/files/60151573294.pdfIn PDF document text
    • http://tatagz.com/uploadfile/files/65329472750.pdfIn PDF document text
    • http://ttworld.hu/uploads/content_files/files/pimolodoze.pdfIn PDF document text
    • http://autothudo.vn/upload/fck/file/lafevekuborojanitalu.pdfIn PDF document text
    • http://michardardillier.com/ckfinder/userfiles/files/72343480692.pdfIn PDF document text
    • https://jordan.si/dokumenti/file/jikapitupijagofesigid.pdfIn PDF document text
    • http://aktifbant.com/resimler/files/44457419860.pdfIn PDF document text
    • http://itcck.org/upload/editor/file/73476057932.pdfIn PDF document text
    • http://erpos.sk/data/files/73842597984.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cc13b75756---23944546202.pdfIn PDF document text
    • http://bn-biz.com/userData/board/file/90487413595.pdfIn PDF document text
    • http://kedehg.com/ckfinder/userfiles/files/60190812422.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/161348c11030ce---84234689566.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/161357c213430b---34455893480.pdfIn PDF document text
    • http://zulassung4you.de/bilder/file/rofezutonodadujinoj.pdfIn PDF document text
    • http://lamexmarket.com/uploads/files/1103187987.pdfIn PDF document text
    • http://winkeleninzundert.nl/uploadimages/files/jogedofakusozedose.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/161376f023e423---tenulizufimupumiretasumu.pdfIn PDF document text
    • https://livermore.com/wysiwygfiles/file/45278307527.pdfIn PDF document text
    • http://z500.si/files/vowejule.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f0d8caabd7---39565028969.pdfIn PDF document text
    • https://dmitrovka-zn.ru/admin/ckfinder/userfiles/files/61092763090.pdfIn PDF document text
    • http://serviphony.com/tinymce/jscripts/tiny_mce/plugins/phpimage/phpimage/upload/images/file/79384887301.pdfIn PDF document text
    • http://dentalweek.eu/userfiles/files/21924068159.pdfIn PDF document text
    • https://globaltranslation.com/demo/global_translation/beta/userfiles/files/sevejurenimutamos.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_off0000d358.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD358 10348 bytes
SHA-256: 095744c7909f51e806c7b2e9c0e678202da7ca3cf7f51bfbd2720f8fdf1e1391
font_01_sfnt_off0000eabe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEABE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000102d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102D0 18184 bytes
SHA-256: 862e77265a5f60d401d57b4a7a2368f2d0c3627a206a4b55bc4612582ef2117d

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