Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa11e133d8be6c55…

MALICIOUS

PDF

91.0 KB Created: 2021-09-07 21:27:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: f040eb4db9b226c0f14a9a5605622789 SHA-1: bebc7b3a31094583f14593c19e187c2e53481b01 SHA-256: fa11e133d8be6c557da620a61175cad1935423c22bbe1a9e0f6f54a75a205297
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF containing embedded JavaScript, which is a common technique for executing malicious code. It also contains a large number of external URIs, many of which point to compromised websites or disposable hosting, suggesting an attempt to distribute phishing content or redirect to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://nomylo.ru/uplcv?utm_term=cinematica+pdf+bachillerato PDF link annotation
    • http://azstorestudio.com/uploads/files/36697093998.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16096a22a0be43---nujefurup.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160707bf411c6f---noruretikiwowesiwixaduga.pdfIn PDF document text
    • http://docando.es/js/ckfinder/userfiles/files/kuwibusalomipixiwepe.pdfIn PDF document text
    • http://i-daa-wl.de/userfiles/62383669911.pdfIn PDF document text
    • https://10kshot.com/customerinterview/ckfinder/userfiles/files/35341927916.pdfIn PDF document text
    • https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/b193430566c294016cf53043d255f465/62276382138.pdfIn PDF document text
    • http://studiopiergentili.it/userfiles/files/33569676288.pdfIn PDF document text
    • http://splogservice.ru/content/files/17829798920.pdfIn PDF document text
    • https://rubyyadav.com/nbloom/fckuploads/file/kojokafep.pdfIn PDF document text
    • https://xn--p3t29jo1ed4o4xw.tw/upload/files/lolinob.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d57d3a83fdd---bopiremeragifuvizo.pdfIn PDF document text
    • http://miet-boot.ch/images/uploadedimages/file/62192130744.pdfIn PDF document text
    • https://australiancaravancentre.com.au/application/third_party/ckfinder/userfiles/files/28551219880.pdfIn PDF document text
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/bd7955c580dade86f3a6af7bb5aab02e/solomisibaran.pdfIn PDF document text
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f1ce8155f3---7713582797.pdfIn PDF document text
    • http://xn--80aafmoni2biho.xn--p1ai/admin/ckfinder/userfiles/files/tosetibi.pdfIn PDF document text
    • http://ghioroiu.ro/sites/default/files/file/40413157728.pdfIn PDF document text
    • https://canionglobal.com/FCKeditor/file/sivomig.pdfIn PDF document text
    • https://taevlingar.se/images/pages/file/85853613868.pdfIn PDF document text
    • https://www.webplease.it/wp-content/plugins/super-forms/uploads/php/files/dbuhq6oqo47cg10e0mebl2meb7/70672541888.pdfIn PDF document text
    • https://falconshipping-uae.com/userfiles/files/takapedewezirutejo.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fb0d0905fe---29337033623.pdfIn PDF document text
    • https://agrilaui.com/userfiles/file/gaxexiwikaxamo.pdfIn PDF document text
    • http://ricarda-allegra.de/userfiles/file/61781218144.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_off0000f859.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF859 10888 bytes
SHA-256: 851ebcc7ac060bf6728c26ef198b8b64d3c0da50c68c81560d78e83d2f39df10
font_01_sfnt_off00011113.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11113 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012925.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12925 20376 bytes
SHA-256: daec1658c5751b0e0151dd39e355a2f63064c88640a78a83ad52016b21997366

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