Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd7664db24af3340…

MALICIOUS

PDF

82.5 KB Created: 2021-09-08 12:19:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 3124d0e4982027767c95b1e326b44a3d SHA-1: b910241495c38830b681d9ba9be7a1e96705a387 SHA-256: fd7664db24af3340095381d185d80c7695646e166524d465b4bb40f4b17c3bdd
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits characteristics of a phishing lure, specifically requesting recovery secrets or private keys, which is a critical risk. It also functions as a link farm, directing users to various compromised websites and disposable hosting, likely to distribute further malware or conduct phishing campaigns. The presence of external URIs and the ML classifier's high confidence score support these findings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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 https://cructi.ru/uplcv?utm_term=adobe+pdf+reader+for+windows+7+free+download PDF link annotation
    • http://mastera-mix.ru/ckfinder/userfiles/files/95177813232.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/16130443255875---49307743677.pdfIn PDF document text
    • http://metzlerranch.com/userimages/80473660123.pdfIn PDF document text
    • http://akademia-jedenastka.pl/zdjecia/fck/file/51951161153.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135f77677867---somapotavurumoguwe.pdfIn PDF document text
    • http://cristal-in.fr/userfiles/file/70474881128.pdfIn PDF document text
    • http://multi-accueil.fr/ressource/site-image/files/53465726653.pdfIn PDF document text
    • http://studiopiergentili.it/userfiles/files/24125694958.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/b9c0b06cc0e776bbc562a8826f5480c2/32717901154.pdfIn PDF document text
    • https://edusfera.pl/upload/file/19939475837.pdfIn PDF document text
    • http://nguyenxuanhuong.com/upload/files/83569811108.pdfIn PDF document text
    • http://tsuiteru66.com/userfiles/file/25819574514.pdfIn PDF document text
    • https://callmarkinvestments.com/callmark/files/webaxojotomotasenu.pdfIn PDF document text
    • http://starcity-vinhomes.vn/app/webroot/img/files/57965228073.pdfIn PDF document text
    • https://copperscrap.wasteequipment.net/ckfinder/userfiles/files/88223459841.pdfIn PDF document text
    • https://nyig.com/files/file/68260089743.pdfIn PDF document text
    • http://hondasushi.com/uploads/files/29406905241.pdfIn PDF document text
    • https://varbackaforskola.se/ckfinder/userfiles/files/48289848147.pdfIn PDF document text
    • https://piphoto.tw/uploads/files/202109031916301638.pdfIn PDF document text
    • https://motiwalainstitutes.org/userfiles/file/dipulogudos.pdfIn PDF document text
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/1fd491da7540d7e498cc5c4a4000dbc0/razuxedafiz.pdfIn PDF document text
    • http://zaiger.ru/img/file/55575739488.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ec5dd36b88---42117850915.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134aea9967c9---lafatarisafadudag.pdfIn PDF document text
    • https://phu-komplex.pl/pliki/file/26495111213.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_off0000ddda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDDA 17732 bytes
SHA-256: 1ceda4fe87ff21fed3a4ba909b0c9bb3f6c086818bba44b7f4beb720eaf8327d
font_01_sfnt_off00010b19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B19 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012330.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12330 10648 bytes
SHA-256: 904aeb45004f9541558b7005bea38d8ec703ce31c9427b701cb65b148086b12d

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