Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed5ebeb38d3dc2c2…

MALICIOUS

PDF

70.0 KB Created: 2021-09-02 21:55:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: cd1537d60a923541cc4d0dfcb58dff7d SHA-1: dc4bf29fcd07f558b150998951b510480fbeaa4f SHA-256: ed5ebeb38d3dc2c290d7cf47d8d6cbc18c0234c82dd3c3c082063addbb96603b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains a link farm pointing to multiple compromised WordPress sites, which in turn host further PDF files. The primary purpose appears to be redirecting users through a chain of compromised hosts, likely to deliver a secondary payload or lead to a phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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 http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/fdc6fd316b5047af696bc5c332910e35/kewetogamo.pdf In PDF document text
    • https://hglobaltourb2c.com/FileData/ckfinder/files/20210715_80EF45F34DEF62D5.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/18e5be9dcc87ff8fe1fded5dc54b2656/8161783364.pdfIn PDF document text
    • https://kalitelivideoizle.com/resimler/files/jajusamusebara.pdfIn PDF document text
    • http://reicar.dk/userfiles/file/salifomu.pdfIn PDF document text
    • https://trade.inter-ural.ru/ckfinder/userfiles/files/42184567575.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/7307b4a786e1df2cc462fb1df9fe82ce/9156778666.pdfIn PDF document text
    • https://h1t-urlaurora1-turbo.com/contents/files/luvuburixofobojuk.pdfIn PDF document text
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/155230056bb5e19c819edf73dd09703c/sevuwosufuzipad.pdfIn PDF document text
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/7c5fbabd4291030d6c3f2a00b1be20db/92016209949.pdfIn PDF document text
    • http://alnoorcity.com/userfiles/file/lubopamafipobalub.pdfIn PDF document text
    • https://lightsourceindiana.com/wp-content/plugins/super-forms/uploads/php/files/8edce71da6afde9517702fef7b65d693/wonosotamijuges.pdfIn PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/2c939463155477bcf2683735eaf3ddd8/4923803636.pdfIn PDF document text
    • https://footballsod.com/images/ck-uploads/files/wogebotudol.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608b82aeefceb---negizojujuvokusal.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160aae1caa2a7f---fonimoxoxitowiwugetu.pdfIn PDF document text
    • https://garraldaarquitectura.com/garralda_userfiles/files/velak.pdfIn PDF document text
    • http://dermaktif.com/imgup/file/tobomonodanamipexi.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a38ff588fe---pamigakolekejuze.pdfIn PDF document text
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/5a2445975c1c9743afa84c232b2ec737/xonurisobimonanada.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084eacf2cfa2---tujuvukasezo.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/161175443f1d9a---52803500943.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=used+jaguar+xe+manual+transmissionPDF 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_off0000b432.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB432 10932 bytes
SHA-256: ae1625e5d6575af82c2c241015e0328b33c882a368b6c822ab3c9d403af038af
font_01_sfnt_off0000cd4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD4B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e55d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE55D 14944 bytes
SHA-256: bc7e91ef3df162bbf9913f76ddc8ea4bad359fe07d46bfbae7206e737b2f478c

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