Malicious PDF — malware analysis report

Static analysis result for SHA-256 30da0831add962dd…

MALICIOUS

PDF

78.1 KB Created: 2021-09-01 23:58:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: abf51aac88535dce60a2867bca54bbb0 SHA-1: eba3fb899650eafad870430ace3c3a25c04ec5d2 SHA-256: 30da0831add962dd7c3b7bfc0c15a84ae48e3c08bffc23fd505cd9e64a6a74a0
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier. It contains embedded JavaScript and numerous URLs pointing to compromised CMS uploads and disposable hosting, indicating it functions as a link farm. The primary purpose appears to be directing users to malicious websites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8139

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.
  • 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://pistant.ru/uplcv?utm_term=she+never+did+say+so+to+daddy PDF link annotation
    • https://octvads.site/js/ckfinder/userfiles/files/23963590454.pdfIn PDF document text
    • https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/eacfd3f296eebaede3db9e7c1d563361/56176427649.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4599c2f4c7---64967731845.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/24f055e1d78e0d9122d6249cc5db3821/xixogareboko.pdfIn PDF document text
    • https://akproauto.net/nbloom/fckuploads/file/xiwavojabejuxilipasojupor.pdfIn PDF document text
    • http://chalappuram.com/userfiles/file/82329061630.pdfIn PDF document text
    • http://apisicul.com/userfiles/files/35693766388.pdfIn PDF document text
    • http://kronospan-mofa-hungary.hu/editor_up/20811864316.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/acvieqpibm70k33liqdfsn1o4q/29179660038.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b82be88fbe9---mabirozatezeketanufev.pdfIn PDF document text
    • https://www.mnspineandsport.com/wp-content/plugins/super-forms/uploads/php/files/6820d0bb8e229a3ec477488daeff054a/jubosar.pdfIn PDF document text
    • http://meuseguro.top/fotosempresa/files/vunevuzitunarifav.pdfIn PDF document text
    • http://sneedfamilyct.com/clients/44919/File/20793294957.pdfIn PDF document text
    • https://ka-base.no/images_students/files/35571415584.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16082be9cae0a3---57237516701.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cdbfd35d5b---rusezurusavajuzapav.pdfIn PDF document text
    • http://ahchala.com/img/file/12374644957.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084ea57b5ba0---40321701610.pdfIn PDF document text
    • http://vdtonline.vn/static/uploads/editor/files/solewugirizaza.pdfIn PDF document text
    • https://foodvellythailand.com/upload/files/98814757337.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/160883252510b5---36851625570.pdfIn PDF document text
    • http://dlt-nkp.com/fileupload//file/82910963481.pdfIn PDF document text
    • http://thuduchouse.vn/pics/file/rofexu.pdfIn 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_off0000d46c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD46C 10552 bytes
SHA-256: 2a6216866bd796b77219d304745edd1abd6e292c89ee5f8a5bf00898934894ee
font_01_sfnt_off0000ec76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC76 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010488.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10488 17684 bytes
SHA-256: a305b329c3efc4522dae51606d9c596e1356461d2abcf5b82ab2061083fc0d9c

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