Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e6a66c927029018…

MALICIOUS

PDF

91.6 KB Created: 2021-06-29 00:17:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7f7ae138e417980cccfdace883c4d519 SHA-1: 20ef7c7a31876dc02bc758478623550cb2c8167a SHA-256: 9e6a66c9270290184d272f8fc8741be8e4fcb66c587fca79fb4e4dc8ab220882
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links pointing to compromised WordPress sites, suggesting a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were directly extracted, the structure and embedded URLs are indicative of a malicious document designed to lead users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://cructi.ru/uplcv?utm_term=gcf+of+40+and+48
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a444fb851aa---nifoxuralerunapifexixiva.pdf
    • http://acm-medicali.it/userfiles/files/29186301185.pdf
    • https://www.analfissur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b45d40942d---18228575020.pdf
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609ee6028cb85---kisiliguninoxeririmom.pdf
    • https://thegioidongphuc.net/ckfinder/userfiles/files/renuguxadubatozolozipibu.pdf
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078acc74be62---56374105400.pdf
    • http://bilmatbasim.com/userfiles/file/85230138343.pdf
    • https://mavibusiness.it/file/3861219054.pdf
    • https://grupo-bahia-real-estate.com/ckfinder/userfiles/files/toxevarenewu.pdf
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b6a8971c867---15787450046.pdf
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c9bead60810---47034825008.pdf
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085d98001e59---52098011924.pdf
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/bacd1375fbe8a4af98c9b14a096af71c/xafimeruxujuvivorolezope.pdf
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c129cf2dcd5---35459848052.pdf
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/1a68e0e74b3b791c7f26717e68a9e5b8/razizikojufoximo.pdf
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/16084d8829cff3---nazekozifogodidapot.pdf
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/0bd63b747d34ca9b0e0390a84961bb7e/kudifavotovi.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b46f81f411c---18217101698.pdf
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/b2029a15b0c6e78269603dbc51f3b4c9/nowexomevovilukoreme.pdf
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/ggqr4ksmkboc9lnbbc3ldqi8q5/nategepefuja.pdf
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608962a4c354c---nerowedopaxenomulume.pdf
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/786ddi95j2ltjs3bn08q1015p5/lobosaserazutosafog.pdf
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/9c7e07915147cfe871cc02f4f9779ad9/30671677457.pdf
    • http://anhuicrew.com/upload_fck/file/2021-5-1/20210501103250144297.pdf
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160c6b10c368a7---7479235668.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001033d.bin
89b0e2f89e8f7afc352059cacdee6a959769a1b769c1c4712f89f4a5f1fd72e0
pdf-font-stream PDF embedded font (sfnt) at offset 0x1033D 17892 bytes
font_01_sfnt_off00013250.bin
527c7a098cd8d3739b3605e81e56e842ae6a0d367ca1a2a5e6fdccd9fed7b18d
pdf-font-stream PDF embedded font (sfnt) at offset 0x13250 10280 bytes
font_02_sfnt_off0001498f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1498F 16792 bytes