Malicious PDF — malware analysis report

Static analysis result for SHA-256 7eff00dee2b8adcf…

MALICIOUS

PDF

443.1 KB Created: 2021-07-07 06:22:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 0e2aa2cccc2cc307a39427264ebdbf97 SHA-1: b14390680ffd86656b4cf0d3c8dbdb2c735a2170 SHA-256: 7eff00dee2b8adcfbdb03131d47228fa4e0ae9e624319619d674e484c885110e
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains a link farm pointing to compromised WordPress upload storage, likely serving as a lure for users to download malicious content. The presence of multiple external URIs and a high number of distinct hosts associated with compromised CMS uploads strongly suggests a phishing campaign aimed at credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7601

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.
  • 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://semut73.com/contents//files/18720313229.pdf In PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/3j6u2il0ai0f2hmru73j52u3c8/raraburiz.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082330ae68b2---zozukoxarokapudososa.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/c14a20f827df60de5c9df1bb9e2d81e6/gekotilo.pdfIn PDF document text
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/a2903938bbce44e5fb21bdcab5e75016/puwuxevinek.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc22c1e9d1---sisuxujavagiked.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/16098937225bcc---tanumibezigekaseluruvu.pdfIn PDF document text
    • http://bjsprt.com/uploadfile/file///2021070709551149.pdfIn PDF document text
    • https://ultralloy.net/upload/files/26856716827.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/972pvr97qm2ub7e2agdj3ppiq7/fojozixofimob.pdfIn PDF document text
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/ef74961f3203ae35c194328d57bb4a41/saxixopufirokatiga.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607f78a34ee33---28752746100.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/a825aaad44bfe78e45592a689e680b5e/64879762904.pdfIn PDF document text
    • https://bhopalliteraturefestival.com/mpsdp/uploads/files/22935595856.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/ummm58aj57l5bl7519r1j7mgg2/36142248615.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/9a2633e00313c057a614bf021f484231/22974284914.pdfIn PDF document text
    • http://iswii.net/ckfinder/userfiles/files/mubujukogetuniw.pdfIn PDF document text
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/a7b2b762ebe32a64c6efc9059461de89/12512094973.pdfIn PDF document text
    • http://amctop.com/board_data/editor_img/file/202105202202.pdfIn PDF document text
    • http://thanuyentea.com/ckfinder/userfiles/files/tirikubujozasu.pdfIn PDF document text
    • https://masterjobintl.com/ckfinder/userfiles/files/jekeme.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/16077413c28c07---tovusutabaginaterewus.pdfIn PDF document text
    • https://istanbularicilikfestivali.com/upload/ckfinder/files/somepivisulasuw.pdfIn PDF document text
    • https://morethancleaningservices.com/wp-content/plugins/super-forms/uploads/php/files/c7660a1d944f720d0a301df1a4855735/nosojupo.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/ts5eu3dj33ule8uldso81alh45/67496010128.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=sc+medicaid+policy+and+procedures+manualPDF 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_off0006759c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6759C 10864 bytes
SHA-256: a471c9c19bf02bd98a75f9bd9192506dede1763d0ba170418980d4fdd393d3cd
font_01_sfnt_off00068ea2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68EA2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0006a6b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A6B4 19792 bytes
SHA-256: 9a01d5035f3abb67afebb35bd31430374720c7f19b3cae51ac82f77653f27833