Malicious PDF — malware analysis report

Static analysis result for SHA-256 11e0ae5b390ac9a0…

MALICIOUS

PDF

96.0 KB Created: 2021-08-04 13:17:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 4212baa1e955360913c862b2237e46ff SHA-1: 8a4105d6e04a9b55e2f06d276105c4c1d9a35d4c SHA-256: 11e0ae5b390ac9a01e66b892b8b1439e9718e75a48edee0694a2f61ee77b0f14
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to compromised websites or disposable hosting, indicating a link farm designed for malicious redirection. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via these links. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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://pizzeria-millemiglia.de/app/webroot/img/editor/file/kowudifo.pdf In PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/vl5p9rotkmsslpc81iompvc3gh/84532320795.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e5f66cb83e---48020681741.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f8c35a07b9b---51905560365.pdfIn PDF document text
    • http://tokstar.com/_UploadFile/Images/file/lirukojafemotakepisodise.pdfIn PDF document text
    • https://kompaspt2.com/contents//files/36829155853.pdfIn PDF document text
    • http://acudrved.com/ckfinder/userfiles/files/luwawutejogowawas.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdb36c7c622---dovagakonewonenibaxaleb.pdfIn PDF document text
    • https://www.eoluk.com/wp-content/plugins/super-forms/uploads/php/files/9bsrv4peigtl7oipehk2mh7gdt/86841540379.pdfIn PDF document text
    • http://reklama-v-sochi.com/ckfinder/userfiles/files/35623435581.pdfIn PDF document text
    • http://mamnonhieutrung.edu.vn/ckfinder/userfiles/files/35008684607.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/2468d56fd1551cf06e471da20197bf4c/sasosanivakowoke.pdfIn PDF document text
    • https://mystruggle.uk/indigo/ckfinder/userfiles/files/96303696341.pdfIn PDF document text
    • http://all-pass.com/folder/editor/file/66632738163.pdfIn PDF document text
    • https://romalasergroup.com/userfiles/files/lezuxepamosum.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16094781438132---2343139151.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/kfse0eo94ipl0lmt791fcmu0hj/27312793543.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/16087e92778d5c---dumaro.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160756e40269b5---59692808720.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/5793a24c0f7c463b5a23a57773a5bff1/zolupuvowijugejufakuzod.pdfIn PDF document text
    • https://ktmcollege.org/public_html/userfiles/file/21275097559.pdfIn PDF document text
    • https://olivierdaulte.com/ckfinder/userfiles/files/sawogumemopesujukatage.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091d708cc10b---38259758191.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=introducci%C3%B3n+a+la+investigaci%C3%B3n+de+operaciones+hillier+lieberman+9+edicion+pdfPDF 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_off0001085f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1085F 11632 bytes
SHA-256: 4621591fe4b6747e19824a381dc906aac3a60e4197a689bd6643a09e9710bbc1
font_01_sfnt_off0001232a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1232A 19756 bytes
SHA-256: 582ec3fc7177cf4d707365ddb1d3e0b63a1fec1bf3f25904f2b1463a52759bbb
font_02_sfnt_off00015671.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15671 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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