Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bbce77bd26d8310…

MALICIOUS

PDF

91.8 KB Created: 2021-07-25 03:55:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 6747090cf26e60ad43ff3c49dddaf807 SHA-1: 99635f958081cdac58c7e30c654afb13bda3b730 SHA-256: 1bbce77bd26d8310ef82a18c83aca7398aec37ae45254e130fa3394f12b8b5dc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It functions as a link farm, containing numerous URLs that point to various websites, including those hosted on compromised CMS platforms. The presence of these links suggests an intent to redirect users to malicious sites for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://cerescommoditiesltd.com/Images_upload/files/dudavip.pdf In PDF document text
    • http://walosports.cl/userfiles/file/bupabikobakadufatipabaw.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fca6e1ec168---bagetepagowatudekezupama.pdfIn PDF document text
    • http://comp-art.ru/userfiles/file/4696765539.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160af84a17e2e8---84029869839.pdfIn PDF document text
    • https://ensasoft.com.tr/wp-content/plugins/super-forms/uploads/php/files/e7ullk747lilioo4ojgevtfq3s/48046905764.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16091e866746f9---kiliditapodogugodim.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1609e2e975e84e---82069330924.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160a7ff004e8f9---biwuzegegixime.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ea3345b5b9---5365531229.pdfIn PDF document text
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/6dccbad55a3046064cccb9543b3c8bc0/viwekiweziv.pdfIn PDF document text
    • http://muzeumostrowiec.pl/obrazy/file/49009995049.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/wijizulisusasiwug.pdfIn PDF document text
    • http://greatwalledmond.com/ckfinder/userfiles/files/45735130586.pdfIn PDF document text
    • https://law.com.sg/wp-content/plugins/super-forms/uploads/php/files/a2aa95279fd534fbfb9fd45e92dbb956/30878738296.pdfIn PDF document text
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160749318da87c---61534886692.pdfIn PDF document text
    • http://baohanhranghm.com/upload/img/files/27333911201.pdfIn PDF document text
    • http://xingyeknitting.com/userfiles/files/44325451501.pdfIn PDF document text
    • http://palami.by/images/file/38429343172.pdfIn PDF document text
    • http://aircond.md/upload_fck/file/jupaxinemewow.pdfIn PDF document text
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/16089d1a69b676---61706435199.pdfIn PDF document text
    • https://zlato-eu.cz/upload/files/16256162816.pdfIn PDF document text
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160d89575eb985---tarakukolaxodarasusafev.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a356396386c---dexusugureli.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a47c09b4404---87527948903.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=filmywap+south+indian+movies+2019PDF 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_off0001032a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1032A 11360 bytes
SHA-256: 42a47e9ba2b48a32fd6d38a2d9d5f8c96814a5376afe41fce7bfd4e72503699b
font_01_sfnt_off00011dda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DDA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000135ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135EC 16644 bytes
SHA-256: 3c45edae1c876a58d74059120e5bb536f3b7ab152e43f2287aa0992856dcbcf7