Malicious PDF — malware analysis report

Static analysis result for SHA-256 0184765e0c0a5072…

MALICIOUS

PDF

88.2 KB Created: 2021-07-02 18:34:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 6a4b79c311adc4bc80d3d68e615c6e07 SHA-1: 83e70073650963bfb529a7d7c281b9dba8049d99 SHA-256: 0184765e0c0a5072afe9b7635fd6b8b13d3cd1b04b8e8720eeb73b2d1a3a7aad
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to various domains, many of which appear to be compromised or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious redirection tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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
  • 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://albawadiroad.com/userfiles/files/kajoxatoko.pdf In PDF document text
    • http://cimkezes.hu/uploads/ckfinder/userfiles/files/vodovenen.pdfIn PDF document text
    • http://glamour-nsk.ru/ckfinder/userfiles/files/mapafedada.pdfIn PDF document text
    • https://crownprolaw.cn/userfiles/Proj_Name//files/panadibozidunosaw.pdfIn PDF document text
    • http://viettelhaiphong.me/data/dulieu/files/xawisezimipabotunixofibi.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c09585878f2---xanurekal.pdfIn PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/f1b074aafc10890cc7f47befdc8008d5/dojuxobofotusoriradavafo.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16094a90760816---65096495895.pdfIn PDF document text
    • https://amd-export.com/site/upload/file/55183096485.pdfIn PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/dfed0e4c4adedeb24a9c71a1bd48a717/13446435137.pdfIn PDF document text
    • https://kop-trans.pl/uploads/userfiles/files/71642950673.pdfIn PDF document text
    • https://unique-u.biz/images/uploads/file/pokujujuke.pdfIn PDF document text
    • http://gesundimjob.at/images/content/files/mozowegefitinituj.pdfIn PDF document text
    • http://muslimofwestbengal.com/mwb/editor_upload/files/waxepovowiruboz.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c776c02f774---tinoxofekoxawosoxixawu.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c99fb5d55eb---vofududazirukuj.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/16077a2e32c6d3---xinonuximawusidosov.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a98d23a8426---jozujakurulesumewisubal.pdfIn PDF document text
    • http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160b6e437763d3---31606125055.pdfIn PDF document text
    • http://usateatop.com/_upload/files/70399131395.pdfIn PDF document text
    • http://www.elitagida.com.tr/wp-content/plugins/super-forms/uploads/php/files/beindffg2sglpe731vu9cb29c5/82801490218.pdfIn PDF document text
    • https://nhahangbienhaitien.com/uploads/files/jubabojomaduvuve.pdfIn PDF document text
    • https://dgaspcsm.ro/ckfinder/userfiles/files/pewulawimugemikof.pdfIn PDF document text
    • https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/3ea4dd0faa76e1e5a71241cb090d3a65/movujotovub.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/rdopmbfqp8q0u4a4vsemb9qp3e/rujotozeselorap.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160792ac1a622b---61024307327.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=christopher+columbus+known+forPDF 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_off0000f4ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4BA 17940 bytes
SHA-256: 90126d077e689a6904cc12156b7c364c58acdc4b19a2ff908f3ac634b78818f8
font_01_sfnt_off000122b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122B6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013acd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13ACD 11032 bytes
SHA-256: 55eaf14a229b9419b7db54cfedc581259af08a5ec06af2d1d20efd730b0c3322