Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e6baedb2ed4f1f6…

MALICIOUS

PDF

87.3 KB Created: 2021-07-20 15:23:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6ebd8f8cadb3fc30cec8591ebc09c34f SHA-1: 1aebb8e4e6f75fe4f3200aac6c493570d54f0ffc SHA-256: 0e6baedb2ed4f1f682d82d430ab7371dc5e93dff7432ca027f9176c484f3637f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, directing users to multiple distinct hosts, many of which appear to be compromised WordPress sites. The embedded URLs suggest an attempt to lure users to external content, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/c43669e98b605e1335ac613b6483181c/46090359053.pdf
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/aan9csggj9nh9kps1c233l6rdu/60811845651.pdf
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/m35d7ugv7r5gto8c65gblor4iu/mivivapabokuxas.pdf
    • http://open.ua/uploads/ckeditor/files/22942430285.pdf
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/k9do4doq4ne965qoa3j5imt96c/75970199450.pdf
    • http://xn----gtbercbfedtm3b.xn--p1ai/admin/ckfinder/userfiles/files/52289855283.pdf
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/160989472c4720---pumukipamunurugo.pdf
    • https://hotnews.md/upload/userfiles/files/35398870696.pdf
    • http://automozg.by/upload/editor/files/minabasapevowezuka.pdf
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a489b847d3d---7407946497.pdf
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c604eed6eff---puzezipalisopisikipeso.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b281240519a---gawulolosigen.pdf
    • http://1hozain.ru/files/userfiles/files/lofegenufab.pdf
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/9c9df3a8a2108c57c39873210b96aea6/xoxosemapabawinik.pdf
    • https://ooobelkom.ru/ckfinder/userfiles/files/bamotazawo.pdf
    • http://hphs1958reunion.com/clients/47465/File/45833309887.pdf
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/c22b06aa4e604bd09d05858c7c9742ad/fowamarogeruputeturazu.pdf
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e7b7cc57abc---21043769719.pdf
    • http://aj-logistics.com/stock/userfiles/file/54033325408.pdf
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c988ed18c0c---18103168734.pdf
    • http://mujuerp.com/uploads/ckeditor/files/20210609045339.pdf
    • http://studioambienteterritorio.it/userfiles/files/5955752361.pdf
    • https://digireg.org/upload/wufek.pdf
    • http://hotelamadeustorino.com/userfiles/files/kasez.pdf
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c15a9a7cc50---rafuw.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=lauryn+hill+singing+his+eye+is+on+the+sparrow
    • 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_off0000f1bc.bin
c3d0b12c2e5a743c853a5fd5b07be7321da18c773138aef96602a8794618412d
pdf-font-stream PDF embedded font (sfnt) at offset 0xF1BC 10788 bytes
font_01_sfnt_off00010a94.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10A94 16792 bytes
font_02_sfnt_off000122a6.bin
e2dbd6c2b40817aeed591ae65bf36e314619d0281e8862d2eeba8f357e9fb48c
pdf-font-stream PDF embedded font (sfnt) at offset 0x122A6 17600 bytes