Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cf65452579fd96a…

MALICIOUS

PDF

73.5 KB Created: 2021-09-13 01:31:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 5de309fb9af2259e6042357a530d2f10 SHA-1: 49a424ef2a405ff662fd9f74e838f8c55edfe0b9 SHA-256: 7cf65452579fd96ab2ce67221bb923ba69510a51f02ca92d0387e57d3e3ff5ef
96 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to compromised WordPress sites, suggesting an attempt to distribute malicious files. The presence of a 'Pokemon Go hack' lure indicates a social engineering tactic to entice users to click on the links. The ML classifier strongly flags this PDF as malicious, supporting the assessment of a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

Heuristics 5

  • 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://ht-cooling-j3t.com/contents/files/50976010041.pdf In PDF document text
    • https://legacydockandmarine.com/wp-content/plugins/super-forms/uploads/php/files/522083a1526254af08d239c4de110586/91001638832.pdfIn PDF document text
    • https://grupa-energia.pl/attachments/file/53141462702.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133d92e8a82f---3415056685.pdfIn PDF document text
    • https://anup.bo/images/files/21057317877.pdfIn PDF document text
    • http://neodermclinic.com/file_media/file_image/file/romitulepakutipiw.pdfIn PDF document text
    • https://wildarium.com/ckfinder/userfiles/files/48636350034.pdfIn PDF document text
    • http://fujieshubao.com/zk/UploadFile/file/2021091102244173499.pdfIn PDF document text
    • http://lhdrum.com/User_File/UpFile/file/20210901222851_ZHVrZW1hcGFzZW5lbGk=.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b52ebb7f9f---88786034195.pdfIn PDF document text
    • https://mygrind.ie/userfiles/file/52916609373.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/1613be7799b814---88495960765.pdfIn PDF document text
    • http://www.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613997a2a19c8---89071186740.pdfIn PDF document text
    • http://gulfcoastlist.com/userfiles/file/xuxemuworaje.pdfIn PDF document text
    • http://xn----gtbercbfedtm3b.xn--p1ai/admin/ckfinder/userfiles/files/tevamogesebukevodepu.pdfIn PDF document text
    • https://prevodi-plovdiv.com/userfiles/file/ruros.pdfIn PDF document text
    • http://posicert.com/upload_fck/file/2021-9-13/20210913062703191107.pdfIn PDF document text
    • https://kaptenhoki.net/contents/files/78969005776.pdfIn PDF document text
    • http://aucoindeshalles.com/menu/file/55763079460.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e6a8169c3c---funejilufojonuba.pdfIn PDF document text
    • http://lncxjzxxw.com/upload_fck/file/2021-9-5/20210905091822558842.pdfIn PDF document text
    • http://voijin.com/userfiles/files/bonosemed.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=pokemon+go+hack+ios+download+freePDF 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_off0000bb83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB83 16824 bytes
SHA-256: 711a8a2c8fdd32a2899a59f7cd5c34da99bec5b200e9d11d07ef2273f22d1825
font_01_sfnt_off0000e725.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE725 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ff3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF3C 11004 bytes
SHA-256: 0ad8a300c9c9b76e2535f58ae5f1098860bc60452e2e862bdc05b4c6ff08eb2a