Malicious PDF — malware analysis report

Static analysis result for SHA-256 abca89d799905724…

MALICIOUS

PDF

68.4 KB Created: 2021-09-14 06:57:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 3e149a8ca7712ee87d05bedd5e66bea2 SHA-1: c1081b80188c26228213dfd06f38ec28d1079351 SHA-256: abca89d799905724f35c3d1f8ab25b5068ce50b51c22213d3316bbfc18e6a1b3
164 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9959

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://ketchas.ru/uplcv?utm_term=voil%C3%A0+ai+artist+app+free+download PDF link annotation
    • http://ecohouse-lab.com/userfiles/file/puwajebugazipivipipo.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/16139d2eaaa5af---salag.pdfIn PDF document text
    • http://daieimotors.com/js/upload/files/81896579291.pdfIn PDF document text
    • https://sofupingame.net/calisma2/files/uploads/54885348237.pdfIn PDF document text
    • https://orrizon.ru/images/file/disok.pdfIn PDF document text
    • http://allamericannursing.com/userfiles/file/rakeri.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131a0e0b86a1---97715797516.pdfIn PDF document text
    • http://emanuelarombiarchitetto.eu/userfiles/files/8278883092.pdfIn PDF document text
    • http://ppogrimall.com/upload/editor_image/file/ratusomimetiravumaguligel.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16137451ae661c---zafegofido.pdfIn PDF document text
    • https://vmgeducationtrust.org/home/vmgedu/public_html/public/userfiles/file/musibubegifa.pdfIn PDF document text
    • https://pre-www.bridge-college.com/uploaded/ckeditor/files/61620070.pdfIn PDF document text
    • http://ain.proximeo.com/ckfinder/userfiles/files/pigum.pdfIn PDF document text
    • http://abwwilson.com/uploads/files/82387854281.pdfIn PDF document text
    • https://igk-lilienthal.de/downloads/wezufezifu.pdfIn PDF document text
    • http://abwingsbuffalo.com/uploads/files/liwinegaxotosadij.pdfIn PDF document text
    • https://www.multilandtours.com/assets/ckfinder/userfiles/files/solanumelomepet.pdfIn PDF document text
    • http://ncteonline.com/userfiles/file/faxesovopawefosebofet.pdfIn PDF document text
    • http://agisma.ru/files/pages/files/soxotagigoxewinakiw.pdfIn PDF document text
    • http://antoniolescio.net/userfiles/files/95286125880.pdfIn PDF document text
    • http://ancheng-medical.com/uploadfile/files/nifujipowubu.pdfIn PDF document text
    • https://aedwea.com/upload/foto/fizudola.pdfIn PDF document text
    • http://mustang.tom.ru/jsplugins/ckfinder/userfiles/files/berewuzudesivezefinu.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_off0000ae21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE21 10728 bytes
SHA-256: 6b23492610ce8dc84f7c405491c138d0937c737b754b956c69c7772a236c23a5
font_01_sfnt_off0000c68e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC68E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000dea0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEA0 14268 bytes
SHA-256: 2125f2bad9d0597eef93ae1ab689dc649d604f4321ff222404edb3042f571ff4

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