Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e196cdeadd5ea5e…

MALICIOUS

PDF

82.8 KB Created: 2021-08-19 12:07:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 317413d7630f90384cceeb0cde18bd0f SHA-1: ab8015ddee382e0c8defe077bcbbf9e82f261904 SHA-256: 5e196cdeadd5ea5e8da95055aa0b41c82840924be611f5456f7831d8e53798ff
164 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to various websites, including those hosted on compromised CMS platforms. The presence of a 'download button' lure suggests an attempt to trick users into clicking these links, which could lead to phishing or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

Heuristics 7

  • 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.
  • 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 https://indikino.com/ckfinder/userfiles/files/gaves.pdf In PDF document text
    • http://xn--80affcyoc0ac1f6a.xn--p1ai/admin/modules/ckeditor/ckfinder/userfiles/files/fabejapiwimukoleg.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160df183161abb---dofemasibitosaje.pdfIn PDF document text
    • http://autobedrijvenindex.nl/images/uploads/woxapovosagisimu.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/20b840ec6a009504d3e783a3167cabb7/kevazegenifizexo.pdfIn PDF document text
    • http://kwiatmetal.pl/userfiles/file/luwujobamenafewasefiba.pdfIn PDF document text
    • https://arerp.kr/data/file///60597886195.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16093fe9273557---vilugu.pdfIn PDF document text
    • https://energooptima.hu/upload/File/54408756556.pdfIn PDF document text
    • https://goldenapp.net/file/31943961560.pdfIn PDF document text
    • http://strategie-online.net/catalogue_dynamique/file/fetubupinudesij.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c5a5a75dd50---74316124454.pdfIn PDF document text
    • https://www.visitrwanda.com/wp-content/plugins/super-forms/uploads/php/files/4f1c73216dbc720f154988b8aee96031/sibudunejasisano.pdfIn PDF document text
    • http://ttlh.vn/storage/ckfinder/files/pebute.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/635f1f4436f3dbcacd20ccec291dbd68/nepog.pdfIn PDF document text
    • http://euredit-editions.com/userfiles/file/66057438714.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be54629c517---zalokozo.pdfIn PDF document text
    • https://soccerauquebec.com/userfiles/file/73842700380.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a082e9bd661---vokirixuwifizixeso.pdfIn PDF document text
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/ofq3m5ulo1f336m38a9g3mgbb7/33503405780.pdfIn PDF document text
    • https://leesman.com/wp-content/plugins/super-forms/uploads/php/files/822dd39881ad23e4ce508311a5f7afc6/7226676848.pdfIn PDF document text
    • http://stolizstekla.ru/userfiles/file/mejodotoxagoxafomepewel.pdfIn PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9bd366df7b---42201561346.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/1e562bc2b8a4c1f33b8bca65f9386b2e/titobexirafikanumot.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=autocad+2016+crack+app+x+force+32+bit+downloadPDF 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_off0000db3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB3E 17396 bytes
SHA-256: e360e4f257508663dd7dda8f88cbcee653210f049bbd7eb1ea0a63e57e9656b4
font_01_sfnt_off000108d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108D1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000120e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120E8 11580 bytes
SHA-256: 1c9002fb4b6443cfa2485aa56fb10db0be3393c5b1588abb8cc705c3ca8f1c29