Malicious PDF — malware analysis report

Static analysis result for SHA-256 05a496eff3718467…

MALICIOUS

PDF

85.8 KB Created: 2021-09-04 02:45:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 2acff7ce6e8b952f83124341c8fec293 SHA-1: b8cf1025b92829d0d086d895222e28ffffb5df26 SHA-256: 05a496eff3718467e8a347156b513d882910b8a94823b91f3a07b7b4cc69c433
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV. It functions as a link farm, containing numerous URLs pointing to various websites, some of which are hosted on compromised CMS uploads. The presence of these links suggests an intent to redirect users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/f98ba176c0e848399ea41b6d7d5ecaea/titegera.pdf In PDF document text
    • http://tomaszskiba.com/userfiles/file/nadiwilesugixadiz.pdfIn PDF document text
    • http://kientrucsangtrong.com/plus/files/94683167899.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c7b21766914---dewalobezuzofeb.pdfIn PDF document text
    • http://orderkiwicafe.com/uploads/files/leruzokorevuwanu.pdfIn PDF document text
    • http://hanmih.com/userfiles/file/20210827120646.pdfIn PDF document text
    • http://pololanna.com/user_img/files/52593026153.pdfIn PDF document text
    • http://hbleg.com/admin/userfiles/files/lalexivuxufegizez.pdfIn PDF document text
    • http://odessahighschool1970.com/clients/7/70/70263b1be1b93b62200e198143f59f20/File/26502986294.pdfIn PDF document text
    • https://letstravelforacause.com/miet/assets/files/30667197017.pdfIn PDF document text
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/0c34a62d6f29c3f272d810008d00b75f/keradebuvisoxu.pdfIn PDF document text
    • http://goodmix-psc.com/userfiles/files/lirogomijevap.pdfIn PDF document text
    • http://patriabrno.cz/userfiles/files/78079935758.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607863fda6302---xodexizasaxavuwufasuzos.pdfIn PDF document text
    • https://dreamscapes.ca/dream_scapes/userfiles/files/59535742833.pdfIn PDF document text
    • http://rosniyom.com/userfiles/files/93065322438.pdfIn PDF document text
    • https://www.aceitedeoliva.com/wp-content/plugins/super-forms/uploads/php/files/8540779bd51e9cac0ad7aaa4164df814/43667315889.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d3290004734---rasujiwubepu.pdfIn PDF document text
    • http://atthaya.com/file_media/file_image/file/47744154060.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a093281572a---kizova.pdfIn PDF document text
    • http://aftckwt.com/uploads/file/45119970834.pdfIn PDF document text
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/43def2256ace2eb0eef7205d26cf7e0a/57619887299.pdfIn PDF document text
    • https://artlabjo.com/userfiles/file/runafibevufuxe.pdfIn PDF document text
    • http://beepost.vn/upload/userfiles/files/15885250099.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=kawasaki+ninja+650r+manual+pdfPDF 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_off0000e8ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8ED 18004 bytes
SHA-256: 0ace635aee859c72d2423fd048cc8de02a7a693e38ab04d8e09c8127120c7bec
font_01_sfnt_off00011762.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11762 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012f79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F79 11132 bytes
SHA-256: a16ee80380a85cd2808e4ecbc5ac707ba22248c64d7fb741058a2de7f4cb0242