Malicious PDF — malware analysis report

Static analysis result for SHA-256 023a0bc230a9f17e…

MALICIOUS

PDF

89.1 KB Created: 2021-06-29 19:44:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 5e178cd317e1ba1e08c9d413c3cbd593 SHA-1: f9dbf712642598d014c66959a358da43f3f3641a SHA-256: 023a0bc230a9f17e0fcb6dc5622b9683ea99796c7988d6aa2be0bce4bdd0d9e7
156 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous URLs pointing to various websites, several of which are hosted on compromised CMS upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of multiple distinct hosts and the use of UTM parameters suggest an attempt to obscure the ultimate destination or track campaign effectiveness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • 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.
  • 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://ideylia.fr/uploads/file/zuwelefe.pdf In PDF document text
    • https://pametnidom.hr/pametne_kuce/userfiles/file/17800755424.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160858f409a786---naxinogunenuvufara.pdfIn PDF document text
    • http://terezmisszio.eu/files/file/zafifonuxof.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/34166297303.pdfIn PDF document text
    • https://muzeumkonstancina.pl/attachments/file/94732370319.pdfIn PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/7de5ef3744ff743fef39bbc61fcabe20/66486927905.pdfIn PDF document text
    • http://maasmartcity.com/userfiles/file/57003641890.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/91q5uo3j8gso4h8eekblop5mqa/3932410865.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/aa7b8a656cd20cae4fd7991aede27382/xenumarezanit.pdfIn PDF document text
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/f77177606c04cc7651668a8206766bf3/21143086415.pdfIn PDF document text
    • http://rgn2u.com/userfiles/files/32707722537.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a829396ea16---91556737072.pdfIn PDF document text
    • https://ols.lighting/wp-content/plugins/super-forms/uploads/php/files/a688831baaadda3f41819c73de336ed2/97883376572.pdfIn PDF document text
    • https://aterhesseg.com/up_image/file/luvodasukulibuka.pdfIn PDF document text
    • http://allseasonsart.com/uploads/fck_uploads/file/23468579444.pdfIn PDF document text
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/360qr5g2pi8s1khuijmn5r3bj5/19690703693.pdfIn PDF document text
    • https://ontech.vn/images/ckeditor/files/dedudozekifer.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160851843c6860---lejusafidiporem.pdfIn PDF document text
    • https://securitydm.rs/slicice/file/jabokodukigiduvasujekiriw.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d3b308f3c1b---22705826563.pdfIn PDF document text
    • http://porpora.biz/imagenes/imagenes_contenidos///16596903099.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=m+phil+education+subjectsPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f912.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF912 10876 bytes
SHA-256: b25cb9397f994cacaf0308f767a83ca5ed71f2a5948851a12fe3dcb26b2c046e
font_01_sfnt_off000111e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111E2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000129f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129F4 17368 bytes
SHA-256: 3102b32e526f02f66596efda5660134737beda5c25713d741fc63a9282fa97e7

Open this report in the interactive analyzer, or submit your own file for analysis.