Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ae08a1afbdc5958…

MALICIOUS

PDF

88.1 KB Created: 2021-09-05 04:09:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: a1153a2bd63cff01507f34a910fea3ea SHA-1: 344186ed41386112cb54c48b85c7f61d76ceaced SHA-256: 9ae08a1afbdc59582a4f8b3f0537e80649f9b9b62222c560f2746cff373b8a88
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV detection as a phishing trojan. It contains numerous embedded URLs pointing to various domains, many of which appear to be compromised or disposable hosting. The primary function seems to be acting as a link farm to direct users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://oniceh.ru/uplcv?utm_term=hack+n%C3%A3o+1500+t%E1%BB%AB+ti%E1%BA%BFng+anh+phi%C3%AAn+b%E1%BA%A3n+2019+pdf PDF link annotation
    • https://mchs.kz/userfiles/File/zodivuzij.pdfIn PDF document text
    • https://limpiezasinasel.com/userfiles/files/ruwami.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/1185149f6f9dd4aa1e9d60db1f56cd02/jagikinu.pdfIn PDF document text
    • http://www.knickmeier.net/images/pageimg/file/97142942826.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607f78b81acf3---nusevegux.pdfIn PDF document text
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/q0s788ec2boljp03a1nm259eju/68678217706.pdfIn PDF document text
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/997337988b8332a8498aeedba2097465/90830259268.pdfIn PDF document text
    • http://gpsputhuppally.com/userfiles/file/69214303566.pdfIn PDF document text
    • https://vegas-shop.net/uploads/files/xipuj.pdfIn PDF document text
    • https://farmacieitaliane.com/documenti/file/27900620791.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce0f2888ad---70918073157.pdfIn PDF document text
    • https://998.geektic.com/geektic/files/90779646392.pdfIn PDF document text
    • http://e-store-sys.com/userfiles/file/82557943566.pdfIn PDF document text
    • http://duocthientam.com/uploads/ckfinder/files/12927834332.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609858bfdcfc5---sadune.pdfIn PDF document text
    • https://lienlacanien.com/img_pages/file/70223045544.pdfIn PDF document text
    • http://alliance-ic.ru/uploads/file/besabofobava.pdfIn PDF document text
    • http://hanboo.cn/Uploads/file/2021072514463770554.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b5ba9e0d5a3---datuvowidarufaputavulupom.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4fb118bf1---fojojabulevirolo.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607fd905dbee8---16396652184.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/unq3ba0ktd335vpp9mp3mufvrp/sejijalojasigugorad.pdfIn PDF document text
    • http://alemotta.com/resources/original/file/37169068020.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_off0000dd24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD24 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f53b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF53B 12308 bytes
SHA-256: d4097aa121a5ac8f24d19cff1a7dc4640a1ceaaabcc55f35bbf0bc86b7e83272
font_02_sfnt_off000111a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111A8 34212 bytes
SHA-256: 19fbc5e27ab25ea317a9c079576394cd4c2b1e17949178b9ba584d07842b8859

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