Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a6986c926a22c6b…

MALICIOUS

PDF

84.6 KB Created: 2021-08-16 20:34:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 1e659fc492fba0378d778e332b3646b4 SHA-1: 6cd411665d02d0c5eae52ef35ad41c24f130d8cc SHA-256: 5a6986c926a22c6bda967f680381f8c81601894151587ca3bc955b8ffd20456f
156 Risk Score

Malware Insights

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

This PDF was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a phishing or malware distribution scheme. The presence of external URIs and link farms indicates an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://pistant.ru/uplcv?utm_term=how+to+program+universal+suddenlink+remote PDF link annotation
    • http://alphasigmaoverseas.com/userfiles/file/tuwetikozezamabad.pdfIn PDF document text
    • https://bednidhitraders.com/userfiles/file/2896617737.pdfIn PDF document text
    • http://mamnonlittlesun.com/upload/files/newimafeguwisev.pdfIn PDF document text
    • http://fonnepal.org/userfiles/file/96848926506.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160d63941b69ef---15826897159.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/3v95rp3j2u7030cnrh7mfa1954/34898197326.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16084cf0461684---nupepenejimazobeg.pdfIn PDF document text
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/n2p3ilt2h0g9m82je86gqm7o11/93935511981.pdfIn PDF document text
    • http://hb1004.com/userData/board/file/lafegini.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/g60cl0l34ad71ut779sedvhh80/zologusoke.pdfIn PDF document text
    • http://www.tokyomagic.jp/images/library/File/23591450699.pdfIn PDF document text
    • https://aurorabersinar2.com/contents//files/dedorevuzawajo.pdfIn PDF document text
    • http://nawooelcs.com/upload/userfiles/2021/07/files/210720061535.pdfIn PDF document text
    • http://cesnek-vysocina.cz/UserFiles/File/fumivezijixaxa.pdfIn PDF document text
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/ko06jdd7vji8ndar8rl48j28bs/pununufigusilagisixaro.pdfIn PDF document text
    • http://theeultimatenetworker.com/ckfinder/userfiles/files/luvazibonerejexe.pdfIn PDF document text
    • https://www.smartfutureexpo.com/ckfinder/userfiles/files/majoratiduwuri.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/9e8495500c61a8d6c01eb6de58341b5c/45981996240.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/gmdd8ruhgb6l4g97q2lvcuq2d6/14826791300.pdfIn PDF document text
    • http://masterkontroll.hu/ckfinder/userfiles/files/6401996865.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/idvu4k3sc40200rljaac6mnhs4/ralovabesunefamikifupu.pdfIn PDF document text
    • https://foxtailmag.net/wp-content/plugins/super-forms/uploads/php/files/0a301fc0640776a102ad329335130679/sobuxike.pdfIn PDF document text
    • 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_off0000e87c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE87C 11072 bytes
SHA-256: ef8485ad413f4b60676462f15bb0efa8707b8bfb413d2fbf0ec0087d36c9fca6
font_01_sfnt_off0001021e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1021E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011a30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A30 16144 bytes
SHA-256: 766af72f75658c48cfca73175d33f90b3d8f7d7baf7a5ed832b70d31e929a91f

Open this report in the interactive analyzer, or submit your own file for analysis.