Malicious PDF — malware analysis report

Static analysis result for SHA-256 1aedc08d6985c699…

MALICIOUS

PDF

69.4 KB Created: 2021-10-02 22:53:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6178e1bbaba468e254ef80b0dfe6e6da SHA-1: 1b4813621ec7e62519be7228615b2da0822b6ad8 SHA-256: 1aedc08d6985c6990a4097cdb148110ed94437f288bbd3f803a2e195374c228d
176 Risk Score

Malware Insights

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

The PDF exhibits characteristics of a phishing lure, including an image-based interface and multiple links to external websites, some hosted on compromised CMS platforms. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it is designed to redirect users to malicious content, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 2 text block(s), carries a click-outward action, and is only 69 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://pistant.ru/uplcv?utm_term=genetically+modified+atheist
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613fcf5669538---4011800665.pdf
    • http://ilturismoinitalia.it/userfiles/files/83571119138.pdf
    • http://ssatripoli.org/userfiles/file/73129064434.pdf
    • http://tdybio.com/uploadfile/file///2021100102502943.pdf
    • https://pleasanton.com/wysiwygfiles/file/80806612594.pdf
    • http://dlzj.net/upload/files/20210915211138989289.pdf
    • http://apart1day.ru/file/79251484342.pdf
    • http://banner-ever.com/ckImg/files/96401238889.pdf
    • http://msinziniering.com/userfiles/file/fizinotofixisivim.pdf
    • http://w-f-l.de/user_img/file/27805228022.pdf
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/1612eeefe1d340---53837667850.pdf
    • http://corse.annuaire-regional.com/ckfinder/userfiles/files/kujeder.pdf
    • http://kartinatv.org/uploads/files/wofuwodinuzolobade.pdf
    • http://jnejendomsdrift.dk/userfiles/file/motoxafarixuvuramezoxub.pdf
    • https://carcarnet.com/home/sandbox/domains/hkdance.tritek.hk/public_html/ckfinder/userfiles/files/lubegikanumexofovegesitek.pdf
    • http://uptownfallschurch.com/uploads/files/63664459384.pdf
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/16145c02800dd1---bezatapederumorobamurog.pdf
    • http://modern-pro.ru/files/file/3148614397.pdf
    • http://btsoft.vn/uploads/files/tujogobalu.pdf
    • https://unitytradefze.com/ckfinder/userfiles/files/jetukuxatid.pdf
    • https://graveyards-fuj.ae/userfiles/files/30062719038.pdf
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/501816d614ced7d3c7bb98784a6978d4/30338848562.pdf
    • http://wuyioutdoor.com/userfiles/file/44870876830.pdf
    • https://ozora.schaffsen.com/contents/file/56273012882.pdf
    • http://xn--80affcyoc0ac1f6a.xn--p1ai/admin/modules/ckeditor/ckfinder/userfiles/files/fadukadasimusujer.pdf
    • http://galantemontagnana.it/ckfinder/userfiles/files/1452390513.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b123.bin
b6b97121a7fe630941969a6e380790cac24a441f84fd669700924f819a4dc2e0
pdf-font-stream PDF embedded font (sfnt) at offset 0xB123 14672 bytes
font_01_sfnt_off0000d58e.bin
81ac727ef235e06ae3d813e7e767da3b26d1bde8d15ca6e779be34256798c7eb
pdf-font-stream PDF embedded font (sfnt) at offset 0xD58E 10792 bytes
font_02_sfnt_off0000ee4d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE4D 16792 bytes