Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0e79a2ea0b2a947…

MALICIOUS

PDF

81.5 KB Created: 2021-09-20 20:34:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 883ca2e5058311d8f2d2616e509a88e9 SHA-1: 4f9e8370e0d9ae65ca3cbed1dcbf549d163b3edc SHA-256: f0e79a2ea0b2a9476554d0a72e2b99c6ba9a1da3f1f0f1fa8d370fe4631452a4
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and numerous external links, many pointing to compromised websites or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or to download further malware. The embedded JavaScript is a common technique for executing malicious code within PDF documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 7

  • 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.
  • 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://oniceh.ru/uplcv?utm_term=copy+ringtone+from+one+phone+to+another PDF link annotation
    • http://skupka23.ru/upload/m/5301339106.pdfIn PDF document text
    • https://shih-tzu.ro/files/file/20498123705.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/16141ac26c0a88---34031609431.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/fa03aba98379c43630ca87fa1c74d294/97827217964.pdfIn PDF document text
    • http://fabrikando.com/cmsimple/images/file/62430132242.pdfIn PDF document text
    • http://kdwatch.net/upload/files/2021090814141483.pdfIn PDF document text
    • http://maychebiengoduykhuong.com/media/ftp/file/refuwefegoxodiva.pdfIn PDF document text
    • https://marwaautorepair.com/nbloom/fckuploads/file/movadidapava.pdfIn PDF document text
    • http://rayanchem.com/d/files/dabiboxapidesutasimotixi.pdfIn PDF document text
    • http://k2plusinterior.com/userfiles/vapadujozajavisadametat.pdfIn PDF document text
    • http://vinmexindia.com/uploads/58770507899.pdfIn PDF document text
    • http://shesob.com/file/files/51062720261.pdfIn PDF document text
    • http://carneiro-sa.pnh.pt/js/ckfinder/userfiles/files/66393625602.pdfIn PDF document text
    • http://iphysiology.ru/upload/ropanadugopamuga.pdfIn PDF document text
    • https://subded.org/userfiles/file/buzonifurapavimin.pdfIn PDF document text
    • https://thai-airpark.com/ckfinder/userfiles/files/17656946664.pdfIn PDF document text
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/b0ffo0qf9npbjr0qkflr3d68uv/51100937810.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/scj932hjq063qg4pkeoo9uetvm/xilekufaboledakasugo.pdfIn PDF document text
    • http://rund.cz/UserFiles/File/mefuxifife.pdfIn PDF document text
    • https://tjp2-hotlink-j3t.com/contents/files/12601648644.pdfIn PDF document text
    • https://acrgruppe.de/userfiles/file/43663876368.pdfIn PDF document text
    • http://mybyblos.com/userfiles/file/41962483562.pdfIn PDF document text
    • http://chinawin-consult.com/userfiles/62119865281.pdfIn PDF document text
    • http://elcolono.net/userfiles/files/83613422458.pdfIn PDF document text
    • https://kop-trans.pl/uploads/userfiles/files/47317422635.pdfIn PDF document text
    • http://alpanelektrik.com/depo/sayfaresim/file/mesetulexomil.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_off0000dbcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBCD 10736 bytes
SHA-256: 0db2bb949954b5f374cc2264b8414021d626fd621abe6554b2e071ab7dd229fe
font_01_sfnt_off0000f455.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF455 16684 bytes
SHA-256: d8caa3f6b30bf977d4cfaa47a77d6f97d267398912380138b4a1a5ffd117725a
font_02_sfnt_off00011fcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FCC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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