Malicious PDF — malware analysis report

Static analysis result for SHA-256 faf1dd829f87e7b0…

MALICIOUS

PDF

97.7 KB Created: 2021-09-06 18:14:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: f730d2a41ddbc42b5e4f1ed975544d36 SHA-1: df051200ea94f7ecaed05b741aea5478f27e2f18 SHA-256: faf1dd829f87e7b0aadff1431b65c366d722e57c90ce93c912c6eee7d43fc457
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file detected as malicious by ClamAV and an ML classifier. It contains embedded JavaScript and numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting a phishing or malware distribution campaign. The presence of embedded JavaScript indicates an attempt to execute malicious code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9315

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 https://bamor.org/userfiles/file/61981282525.pdf In PDF document text
    • https://icon-studios.com/userfiles/file/nodumulajubidegepewa.pdfIn PDF document text
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160b0a3a8d7a0a---kiwalopananatefokux.pdfIn PDF document text
    • https://minegociomiweb.com/userfiles/file/61448757095.pdfIn PDF document text
    • https://people11people.gr/uploads/File/darosenimelisofoginanov.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/pmko1ke361apfb4k56mk0gh1tm/31985878243.pdfIn PDF document text
    • http://ueros.fr/admin/ckfinder/userfiles/files/makamopiw.pdfIn PDF document text
    • http://wittymall.com/multimedia/userfiles/file/kexoza.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608325ac8f6a5---kewuxabawevatijuzezenawos.pdfIn PDF document text
    • https://www.audioclinica.pt/wp-content/plugins/super-forms/uploads/php/files/1kj82u17p8nnc29qqt70lb7lmn/robid.pdfIn PDF document text
    • https://elsa-daulte.com/ckfinder/userfiles/files/92009410736.pdfIn PDF document text
    • https://aarhuskortet.dk/images/file/zawumenasa.pdfIn PDF document text
    • http://onlinevay.com/upload/files/26151315229.pdfIn PDF document text
    • https://kanalprofi.at/UserFiles/file/gewozaguwi.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d43e464a7e---rebepirejebedenovonuzof.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/13ca7c66708822be5673ff750e57a0c3/27229880312.pdfIn PDF document text
    • http://pogservice.ru/userfiles/file/latokaxogof.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/85393d38561be3ec4bf7f2c04fb8e6db/ruboxepubadoguv.pdfIn PDF document text
    • https://muratay.nl/userfiles/file/fekumoxesukutiwobemuwa.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/ed4c12288eef771b5eb1180ede43f670/wujetusakipobu.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/bbb22af6628289955b719a97f0e749c0/buriretikogokepuguremab.pdfIn PDF document text
    • http://tchid.net/userfiles/file/zopixedekerusaza.pdfIn PDF document text
    • https://sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b3361093771---zarinisofalewumoparuras.pdfIn PDF document text
    • https://moraure.net/js/ckfinder/userfiles/files/89364040040.pdfIn PDF document text
    • https://pharmawell.eu/ckfinder/userfiles/files/20759501884.pdfIn PDF document text
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a7c8d51ea3a---sogetarud.pdfIn PDF document text
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0bc25683c---25913607598.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=umrah+dua+pdf+in+teluguPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000e2a1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xE2A1 17088 bytes
SHA-256: 36e719945c4cd3057aa1d1a1d4d895fdf8ae04d3ccf0195abe776ef71c8d1722
font_01_sfnt_off0000fbcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBCD 10764 bytes
SHA-256: f587412e533f684b174fdd103f96ead95c78d798da525329af1825447ed70dad
font_02_sfnt_off0001140a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1140A 1868 bytes
SHA-256: b44e304f4199d162c520aa61e4565b27969aa952fa2ee1db3f4cf671ae1a9eb8
font_03_sfnt_off00011cbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CBD 26788 bytes
SHA-256: 9651018e32196f8f1faa2ca3d5bbb76d016a55b6ee73025c2b05b9344bba91ac
font_04_sfnt_off00015e75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E75 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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