Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c452dd30afdae30…

MALICIOUS

PDF

92.2 KB Created: 2021-06-27 23:15:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: efaa73d251d99d5098dc47eb0952cd77 SHA-1: c539865f3c9095f82ba6a159b60e4dc2204ba79b SHA-256: 2c452dd30afdae30ac963c77ecfe84588df0dc9ac8e77ba4389e8a7b9cc6fc1f
204 Risk Score

Malware Insights

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

This PDF document contains embedded JavaScript and multiple external URLs, indicating it is designed to lead the user to malicious content or downloads. The 'SE_CLICKFIX' heuristic specifically points to social engineering tactics that instruct users to execute commands, likely to bypass security measures. The ML classifier and ClamAV detection further confirm its malicious nature, suggesting it functions as a downloader or phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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://philabc.ru/uplcv?utm_term=minecraft+ice+and+fire+mod
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/44f805dae391924b5566e59ff167023b/44614041117.pdf
    • http://safeabortionnepal.com/userfiles/file/vozugevev.pdf
    • http://gtlmarinefuel.com/userfiles/file/vejomevepedebaxifelu.pdf
    • https://bataretak.com/img/files/file/55424116346.pdf
    • https://seeandhearbetter.ie/img/shop//contents/widudigexovafoperi.pdf
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/160866c5daa061---9543283109.pdf
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/2e50ca0fd028259c43740daa5223139f/sagowup.pdf
    • http://cuacuontoanthang.com/media/file/linuzopidobewimejolupajaj.pdf
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7486590172---jixarisuw.pdf
    • http://gunjanjain.com/app/webroot/js/uploads/files/tejixodafulixexazo.pdf
    • http://bbpcosmetics.com/admin/upFiles/2021-5/file/muwufibojozepuvepiwa.pdf
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16099f2542b2f7---fejidajojetumepikibipuwus.pdf
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a4ca24352ae---kazijagumezupagop.pdf
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c915581c00c---wutovorewu.pdf
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/c30f2921031f3b93713fb32e20e24804/6283703032.pdf
    • http://kondicionery-krasnogorsk.ru/upload_picture/file/63082329320.pdf
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160985eda1905b---6886100039.pdf
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0b23cef751---tibawo.pdf
    • http://wabasnb.com/files/fckeditor/file/115909188360b3fd4dcc8de.pdf
    • https://www.hausbootgeiseltalsee.de/wp-content/plugins/super-forms/uploads/php/files/0cl20477submtm8hsrj2p7cta2/82101517558.pdf
    • http://samuiluxurytravel.com/Uploads/file/78584933959.pdf
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c9b04c66337---33472615866.pdf
    • http://moscow-vernisage.com/files/files/55454905151.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edc1.bin
d00ab4361df7dec9aa07ccd7b851271cecb31c324187019feca4f9557b406565
pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC1 18892 bytes
font_01_sfnt_off00011cf5.bin
9a58f541ba7856fd526d451f431fc9a03f56f678533c47ce1feb3003e7ef9f18
pdf-font-stream PDF embedded font (sfnt) at offset 0x11CF5 10416 bytes
font_02_sfnt_off0001348b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1348B 16792 bytes
font_03_sfnt_off00014c9c.bin
a013ce2342554bbd70a9f85285a6053b67e9b25eaba0dd22223cc179b1b1ea16
pdf-font-stream PDF embedded font (sfnt) at offset 0x14C9C 16064 bytes