Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee95ef6c9e5092df…

MALICIOUS

PDF

93.1 KB Created: 2021-09-05 02:47:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 9e49ca90d37963bedcba279bcc5d3d2d SHA-1: 8bbe40a011d56e03e439d91658808098f8045e68 SHA-256: ee95ef6c9e5092df8d68f296294414e32d9a7fc2a032cdc118c6c3d43328e88f
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. It contains embedded JavaScript and a significant number of external links, many pointing to compromised WordPress upload directories, suggesting it's part of a link farm designed to redirect users to malicious content. The embedded JavaScript likely facilitates the redirection or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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 http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070a64d66be1---28314405264.pdf In PDF document text
    • http://simsvizag.com/contentimages/file/94994062998.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/512162e58aeabb0cfc2323ab14b5dff8/begununokukizitofupiz.pdfIn PDF document text
    • http://hodoan.net/userfiles/file/29340400806.pdfIn PDF document text
    • https://tusenfotingen.nu/anvandarbilder/108/files/73477496152.pdfIn PDF document text
    • http://lab4050.com/upload/editor/file/modunajixotizusuzodoneto.pdfIn PDF document text
    • http://www.motionmantra.com/userfiles/files/16019531561.pdfIn PDF document text
    • https://otartufo.com/ckfinder/tartufofiles/files/92503774401.pdfIn PDF document text
    • http://www.oneworldkarate.com/fckeditorimages/userfiles/file/gaxupusekupemoseli.pdfIn PDF document text
    • https://deniz-sogutma.org/img/userfiles/file/6857849941.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/161148345f0b03---14902463008.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/d8f349458bf0974bc44067e7c03f4228/xiledujuxuwexajawefimafin.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608123854f826---28178444799.pdfIn PDF document text
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/41eb33b0132c6ccca48f0b70f75a7d44/20647960944.pdfIn PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a46fd590abb---nogolimilaruvapuwine.pdfIn PDF document text
    • http://paintmaster.hu/js/ckfinder/userfiles/files/sazutamadile.pdfIn PDF document text
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1607813c7b7b3a---21095699486.pdfIn PDF document text
    • http://zonweringnederland.com/ckfinder/userfiles/files/89053945188.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/161044cfb5b961---80420531747.pdfIn PDF document text
    • https://www.avantagesapp.com/uploads/files/80369126225.pdfIn PDF document text
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/bd37d9db791ff00b47128f8db8abe425/86570108015.pdfIn PDF document text
    • http://burelomdo.com/ckfinder/userfiles/files/76953231407.pdfIn PDF document text
    • https://vildmarksjagt.dk/userfiles/file/31036888597.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1370d7ef15---pezuzojufevoxamebakifi.pdfIn PDF document text
    • https://mimpiindah1.com/contents//files/zebanaw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=definition+of+knowledge+by+different+scholars+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_off00010349.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10349 18796 bytes
SHA-256: cf57909456c510da8f5666b33244af5edefde8211fdd3f35a350d77268f7d882
font_01_sfnt_off00013435.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13435 11332 bytes
SHA-256: 4f63dfa70e6f1739ec8c6504e809d9646f7c6d2263690a18049f49020e29fab7
font_02_sfnt_off00014e75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E75 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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