Malicious PDF — malware analysis report

Static analysis result for SHA-256 5063f2e5deea036d…

MALICIOUS

PDF

69.1 KB Created: 2021-09-10 10:01:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 4d81b07507efabf1d8ca4377b42afe33 SHA-1: 4edaad4243069c837af09e5aac83ffd916e068a8 SHA-256: 5063f2e5deea036d51388956f169fb489d93612633353b8cb551921f91d79a13
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. Heuristics identified it as a link farm pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious sites. The embedded URLs, such as http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/thrnfavckce3acja6bfac3q8cddd93kh/nolapemod.pdf, are likely part of this redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 http://firstcuwire.com/file_media/file_image/file/xodomadow.pdf In PDF document text
    • http://ned.ru/uploads/files/vumuxitegujixobavobinav.pdfIn PDF document text
    • https://duvarkagidierzincan.com/userfiles/file/57107429513.pdfIn PDF document text
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/thrnfavckce3acja6bfac3q8cddd93kh/nolapemod.pdfIn PDF document text
    • http://ryukatsu.com/userData/board/file/96322856441.pdfIn PDF document text
    • https://renebeumer.nl/userfiles/file/penagiwusipilimumugefavuw.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/1fntrr1q1mcdf0f14tdvci1dmq/12128154530.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161350575e702b---84972334829.pdfIn PDF document text
    • https://ipekyolumedya.com/resim_galeri/file/tababipivegebusefuluwoza.pdfIn PDF document text
    • https://padservhosting.com/userfiles/file/9749625273.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/10b4473b9f4367dae738c88d2029800c/81206412628.pdfIn PDF document text
    • http://ndt-tl.ru/upload/file/lokox.pdfIn PDF document text
    • http://xaydunglenguyen.vn/upload/files/b757ef.pdfIn PDF document text
    • https://oilbasaro.com/web/images/ckfinder/files/20210910062032.pdfIn PDF document text
    • https://stepweystudy.com/ckfinder/userfiles/files/rebidudulo.pdfIn PDF document text
    • https://gullyracing.it/admin/ckfinder/userfiles/files/kosodajisukajunaguke.pdfIn PDF document text
    • http://myphamnanyno.com/luutru/files/rojowowat.pdfIn PDF document text
    • http://star-transform-moscow.ru/uimg/files/sidatulujixi.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/sivemobovuxisujisufijemar.pdfIn PDF document text
    • http://skrabl.pl/www/rpbd/fck/file/51503446998.pdfIn PDF document text
    • http://riskhedgetech.com/uploaded/file/279684854613783db11bd3.pdfIn PDF document text
    • https://khangle.vn/uploads/images/files/52479908659.pdfIn PDF document text
    • http://schoonhovensvrouwenkoor.nl/ckfinder/userfiles/files/tuwadoxutuxejepabodiw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=facebook+for+android+apk+download+latest+versionPDF 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_off0000b157.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB157 10976 bytes
SHA-256: dc67a5fd84267d403a9e4c84a28fc8767c928ff8e3bdbf66a5c5020a5f112ec5
font_01_sfnt_off0000cac8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAC8 14564 bytes
SHA-256: 61660be760a92f1f29685c8078bf1131fbbecf097a9f136759fda5bb4fc6aa97
font_02_sfnt_off0000eee7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEE7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1