Malicious PDF — malware analysis report

Static analysis result for SHA-256 abe0a74cd1a6ef1d…

MALICIOUS

PDF

96.7 KB Created: 2021-07-04 13:56:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: f70085a6112ff5442564833afc06df3f SHA-1: 197ea856be46aa8e315e4a2d3d383f40ce17990e SHA-256: abe0a74cd1a6ef1d6a2d6763703a4f0744c088f6b04a7e9edc8f194278b7284a
196 Risk Score

Malware Insights

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

This PDF document employs a social engineering lure, instructing the user to install a browser extension or update to view its content. This is a common tactic to trick users into downloading malware or revealing credentials. The presence of numerous external URIs, many pointing to compromised CMS upload storage, further supports its malicious intent. ClamAV detection as Pdf.Phishing.Trojan confirms its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9910

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://krisoc.ru/uplcv?utm_term=family+link+manager+apk+download PDF link annotation
    • http://allprintusa.com/admin/images/file/79554828649.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16083e09edd04d---pezedifilifuduxoxoxixosed.pdfIn PDF document text
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0c7c29124d---kesufarinixivopiduxiwugik.pdfIn PDF document text
    • https://t2sc.me/userfiles/guzakisigawefalero.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090d80ce455a---92600611308.pdfIn PDF document text
    • http://bephoangdung.vn/uploads/ckfinder/files/84458509843.pdfIn PDF document text
    • http://softwarefactory.nl/images/file/71853633767.pdfIn PDF document text
    • http://alexhofford.com/temp/files/file/gavutitanidotejifuduvivi.pdfIn PDF document text
    • https://pet-fashion.ro/mm/file/vazatelorudimitep.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072b14ad928c---gopenamexi.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c661a4c2f33---81098723047.pdfIn PDF document text
    • http://119hero.kr/userData/board/file/rotufirit.pdfIn PDF document text
    • https://fetogram.ir/images/upload/files/sumozifurokowas.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/16072e36df146b---xajerolexo.pdfIn PDF document text
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/bhfea7pgth96591qn35tjr6qa6/62744999805.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/oqbblvib1ps278h78i3bqq7kdr/gezafit.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/1d5429548a92ed04079fbceddf8a828c/90612526255.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf7ec430f19---22272101550.pdfIn PDF document text
    • https://vildmarksjagt.dk/userfiles/file/zurugekatapojuw.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af862097d54---49102584267.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/lu7l6ega5h415mfenvtde3ieso/66024537395.pdfIn PDF document text
    • http://ccsl.asia/files/laluw.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c6f85d0a934---412540816.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16079b1796489e---54001474990.pdfIn PDF document text
    • https://almuhja.net/ckfinder/userfiles/files/vexixinipovaxakemenikanus.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fbcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBCD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000113df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113DF 19376 bytes
SHA-256: 2f7912bea8f9eef1910b79b5414662ff7ec953b8a80df458632b19199898600e
font_02_sfnt_off0001441e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1441E 10736 bytes
SHA-256: 19cf1a0929b9a2c7a29656c0072ee5e4a290bd82e2309a2ab59a40e71ac46d61
font_03_sfnt_off00015c78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C78 16488 bytes
SHA-256: 075c8b0b4e31ad330b88e5ab1c407b87794fbe65b17046e546794509b73daaec

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