Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0f32d8f0d709521…

MALICIOUS

PDF

276.2 KB Created: 2021-06-30 05:31:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b8307516ba39a27ba2297fe76a4477a2 SHA-1: d7a0ce1262c2305b8ace9a867ec866b97e4b7fff SHA-256: a0f32d8f0d7095212283494ecda2d6e3afaae8672bbc7a32469eb9a9cff1f80c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. The presence of numerous embedded URLs, many pointing to compromised CMS upload storage, strongly suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious intent, likely to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://szaniterplaza.hu/ckfinder/userfiles/files/nozixolepejaziwijok.pdf
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/d25692567d00312fc9ad75d170cb1c2e/vetekuwoxoseluj.pdf
    • http://nickels.design/ckfinder/userfiles/files/65387853521.pdf
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a1fe208539a---gatijukunisojowuboxit.pdf
    • http://ingenermarket.ru/userfiles/36896807448.pdf
    • https://betenrealestate.com/sites/default/files/file/wotaxutut.pdf
    • http://cainghienbinhduong.com/uploads/userfiles/file/jedaleduk.pdf
    • http://istrouma1971.com/clients/9/9b/9b88b062b8d6af44b28e209fcb06d7d5/File/lotexozizegulera.pdf
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/fde2c315f7eee55f039ff30fdf8508af/xixozokarazonedon.pdf
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ddd2a375f0---36245054457.pdf
    • http://beiwendq.com//data/attachment/file/92065539929.pdf
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbcaeb8cb4---96456562993.pdf
    • http://3e-machinery.ru/app/webroot/filesfiles/gulitogezox.pdf
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/160773926d339c---98447757686.pdf
    • https://immo-macedo.lu/userfiles/files/68232378611.pdf
    • http://deficanderel.org/clients/6/67/674a09facce11b7629d390eef9534ff9/File/15755423582.pdf
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/73747e85812255ea07fdc980bb4f4bcf/21993880032.pdf
    • http://infinity-pro.ru/userfiles/file/fumixifoxofuvomujo.pdf
    • https://teenvolunteerhouston.org/wp-content/plugins/super-forms/uploads/php/files/fba73cc574b20cb9fc52879e69e23eb8/41912660218.pdf
    • https://dogathermalhotel.com/resimler/files/1286794712.pdf
    • http://carefirstwalkathon.com/clients/8/89/89514deb4c0e8807eb046cac28c4977f/File/77453421578.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=location+of+meristematic+tissue+in+plant+body
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/f7d0cf9fed9721974fdb964b554f0fbd/37919133548.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_off0003dfc8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x3DFC8 16792 bytes
font_01_sfnt_off0003f7df.bin
ae61c593571b4df887085cfa964f378cbcf6da872aa8a822f5988a48b176d04e
pdf-font-stream PDF embedded font (sfnt) at offset 0x3F7DF 11092 bytes
font_02_sfnt_off0004117c.bin
9f7d612da4fa573fdebace037ed72acc011f197942afae02b2332332baf80c35
pdf-font-stream PDF embedded font (sfnt) at offset 0x4117C 18900 bytes