Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a370e94633e8a68…

MALICIOUS

PDF

88.8 KB Created: 2021-07-22 15:41:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 65888dc843c34a107fd879ec5fc14aa7 SHA-1: 1cbc8b91031e28f13bdd800444f1e6616876bb1f SHA-256: 4a370e94633e8a680cdddb64d4926e66e5740adfc65fe6b351b7d3fdcac7a172
224 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document exhibits multiple indicators of malicious activity, including a high ML classifier score and ClamAV detection. The document's content and heuristics suggest it functions as a lure, specifically requesting sensitive information like recovery secrets or private keys, which is a critical risk. It also contains numerous links to potentially compromised websites and disposable hosting, indicating an attempt to redirect users to malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://mmdplus.com/userfiles/files/20210715_184214.pdf In PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606caca4de718---xitasumelebogab.pdfIn PDF document text
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/2u4pkdsn8a8ekjvf61scepf5jo/fesezubasefovebupilodabu.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e2db32cb4b---25785656783.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/dimezebowi.pdfIn PDF document text
    • https://anfauglir.com/images/file/jekawugamopifevekexos.pdfIn PDF document text
    • http://vasamo.org/pds/userfiles/files/75247941886.pdfIn PDF document text
    • http://aelma.com/sites/default/userfiles/file/88219045145.pdfIn PDF document text
    • http://ahdongjiu.com/upload_fck/file/2021-5-4/20210504022014714663.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/3f606e556e96c19a438b999eeafea577/14692338794.pdfIn PDF document text
    • http://elitaliaweb.it/upload/file/taxofumotes.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/9ltqf5c8nb457m0nmqbs5fbl62/janafigidawukeju.pdfIn PDF document text
    • http://sosonomo.com/ckfinder/userfiles/files/fapase.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a7fb7853f7---vonatiz.pdfIn PDF document text
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/o3622fcdd9cqptgv3668eo2n8u/7204250837.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5adcccefde---29738814951.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a53692d1eec---23509960007.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160a74ea9d0ae1---xoxutinubuwisek.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b0b70eab610---7470726047.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/7b6668996361c17478b8feceb5e8e04b/ruxejelukugitupin.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3e5e9b161b---vixeverigigorilunudora.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/bdf37b9fc8034641f809da0a40348940/kuruvevo.pdfIn PDF document text
    • http://shmgec.com/Uploadfiles/files/noxerubugo.pdfIn PDF document text
    • http://donghotam.com/luutru/files/xotejufisojiferu.pdfIn PDF document text
    • https://sunarchegypt.com/userfiles/file/rirefoxiranodapikuxoz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=software+engineering+notes+pdf+for+bcaPDF 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_off0000f5f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010e10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E10 11052 bytes
SHA-256: ebd3401d5144e8a4b345640bb03829ec5f7a891de4287131255429b0480040f4
font_02_sfnt_off0001278d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1278D 17288 bytes
SHA-256: d081c273c97f1138ff0d98678a4a2b984098b073e68b5b6662cf33cd920a0abc

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