Malicious PDF — malware analysis report

Static analysis result for SHA-256 13787c972a131812…

MALICIOUS

PDF

89.4 KB Created: 2021-08-13 08:52:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 80d9fa1197766713862654792c94ee9f SHA-1: 3b3fdbf0b499cdcffbe7a6a9c26885c624e5b361 SHA-256: 13787c972a131812e1e99566b148e539702d149c88bc5dc100134e4dd4383537
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs that function as a link farm, directing users to various external websites. Several heuristics indicate that these links are hosted on compromised CMS platforms or disposable domains, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://allytemp.ru/uplcv?utm_term=novie+indiskie+filmi+s+uchastiem+shahrukh+khan PDF link annotation
    • http://toptoptraining.ru/img/upload/file/ketizegirojojikexuraj.pdfIn PDF document text
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/8d1923159f64dd35db6e98a1f59b4eda/dojonesuvozixonibifif.pdfIn PDF document text
    • http://uptownchantilly.com/uploads/files/90120786182.pdfIn PDF document text
    • http://americanewbie.com/userfiles/file/16814262792.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/5c1e411455089c557ef273bbf2b3f436/xopuverufebu.pdfIn PDF document text
    • http://artdealer.vn/upload/fckimagesfile/4c92f2cba211636e7cf3772bfcefd4b3.pdfIn PDF document text
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/c6ed4805404c21483aa8b7db2b7f4139/94354957606.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160aebfa29f60e---samaturofi.pdfIn PDF document text
    • http://www.onlinetemsilci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160725e6ae8f52---sawezuzininivawi.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/ce392126233d178cf42035afde928d16/52841522156.pdfIn PDF document text
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071e9aa962d0---bujixobokefovupisubila.pdfIn PDF document text
    • http://bigyikesmedia.com/home/xtremweb/public_html/consultinstitute/web/upload/files/webemugo.pdfIn PDF document text
    • https://aspaeng.com/files/image/files/nogikupar.pdfIn PDF document text
    • https://fullhousetourism.com/UploadFiles/file/20210531085722134.pdfIn PDF document text
    • http://sanarina.de/ckfinder/userfiles/files/94708488164.pdfIn PDF document text
    • http://www.asap-recruitment.net/upload/file/xetiguzemelosej.pdfIn PDF document text
    • http://sola-brothers.com/userfiles/file/76713070089.pdfIn PDF document text
    • https://vishalahospitality.com/ckfinder/userfiles/files/jufuroxabajuxo.pdfIn PDF document text
    • http://xn----8sbaqfskngn1qi.xn--p1ai/userfiles/file/logegavipilexozema.pdfIn PDF document text
    • https://www.mmgrowersg.com/ckfinder/userfiles/files/96200264796.pdfIn PDF document text
    • http://crocepadrekolbe.it/userfiles/files/jinosasolakijexa.pdfIn PDF document text
    • https://adreshosting.com/calisma2/files/uploads/nolapufezisito.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_off0000eb27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB27 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001033e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1033E 10976 bytes
SHA-256: 717d424f2ac8eb45812bbbfc3ea366050c8bb864fdde6e7b0c60a670143021f0
font_02_sfnt_off00011c93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C93 22744 bytes
SHA-256: 86379b0a43d2493caa7dd5f4a74c12aebcc4de362eec86b5c7fbb904fb40f131

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