Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3ee45100f950e28…

MALICIOUS

PDF

58.4 KB Created: 2021-09-22 13:58:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: a636aa84edec1830b5a1b471fc3412a3 SHA-1: a0caf4faf45f77ecddef5811094d08df0c8b02dd SHA-256: d3ee45100f950e2876212565d3c7dbc83c4f90716f67d5eae5e535d649fac088
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by ClamAV and ML classifiers, exhibiting characteristics of a phishing lure. It contains embedded JavaScript and multiple external URIs, including one pointing to a raw IP address, which are likely used to redirect the user to malicious sites. The document's structure, with a single image and minimal text, strongly suggests it's designed to trick users into clicking a hidden action, leading to a compromised site or a download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6508

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 58 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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
  • 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://laflammerouge.ch/userfiles/files/ketipoxezojimedewasup.pdf In PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cb2fce43ba---mogolu.pdfIn PDF document text
    • http://stellarp.com/userfiles/files/37226789191.pdfIn PDF document text
    • http://esipro.be/userfiles/file/wisesowopafoduzogakus.pdfIn PDF document text
    • http://archetipoingegneria.it/userfiles/files/95509121059.pdfIn PDF document text
    • http://211.129.1.225/system/ckfinder/userfiles/files/besejakijofazalakepoxi.pdfPDF link annotation
    • http://sun-green.de/ckfinder/userfiles/files/52360327588.pdfIn PDF document text
    • http://dspec-car.com/js/upload/files/fekibenuzajukewu.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/906020524a3c9eb8dbbeda8a0d2ef138/91642473316.pdfIn PDF document text
    • http://logicparcel.net/uploadsEditorfile/fatosodolutoto.pdfIn PDF document text
    • http://natur-pet.cz/webpagebuilder/ckfinder/userfiles/files/53062809724.pdfIn PDF document text
    • http://guanzhuli.com/userfiles/file/74883551806.pdfIn PDF document text
    • https://korzayithalat.com/spot/admin/fckeditor/userfiles/file/zifitegawukofozilusite.pdfIn PDF document text
    • http://sunriverps.com/data/editor/file/50417253917.pdfIn PDF document text
    • https://linhngapt.vn/upload/files/51978010774.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16145e43995809---52290080043.pdfIn PDF document text
    • http://sportgalaktik.sk/userfiles/file/lorepazasowukiso.pdfIn PDF document text
    • http://hbisan.com/userfiles/file/97601387309.pdfIn PDF document text
    • http://fli.edu.mn/ckfinder/userfiles/files/34669939643.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/161459a569f79d---92760288621.pdfIn PDF document text
    • http://shijijiaming.cn/filespath/files/20210912055234.pdfIn PDF document text
    • http://benardoutlite.com/admin/fckeditor/fckdata/file/xokema.pdfIn PDF document text
    • http://jia-longsofa.com/uploadpic/jialong151126/files/202109122204027065.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=multi+derivative+calculatorPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000af05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF05 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c71c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC71C 10252 bytes
SHA-256: 5b99c3a86c5a9d7c80ed5b90053089637dd38bef5bb35b39ce479045657114c9