Malicious PDF — malware analysis report

Static analysis result for SHA-256 222b1cd5d311b9f7…

MALICIOUS

PDF

72.5 KB Created: 2021-09-13 12:07:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: f04319fecc2d37ce8e5f3236352d674a SHA-1: 2e278ce7c38f4b3374a96742a4ed8578096260e7 SHA-256: 222b1cd5d311b9f7c227cbf10187c832b5afd7c09c15ece3eda0ebb42c1bd111
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document functions as a link farm, directing users to various compromised websites. The presence of the 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates that the document likely instructs the user to download a password-protected archive, a common tactic to bypass gateway security. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://satesayap.com/contents/files/nadagubuda.pdf In PDF document text
    • http://tznjl.com/userfiles/files/28757007385.pdfIn PDF document text
    • http://maschimaurizio.it/userfiles/files/rowizapedimulovi.pdfIn PDF document text
    • http://ingegneriarossi.it/userfiles/files/62174665600.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f9563df14f---57632505751.pdfIn PDF document text
    • http://saimiri.name/upload/file/boxupebozuxajeroma.pdfIn PDF document text
    • https://cuatudongnhatrang.com/uploads/files/60738819999.pdfIn PDF document text
    • http://www.jokilaaksonratsastajat.fi/file/85669694886.pdfIn PDF document text
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/8b7e5efa21c84a4eec46428b3b595153/ronen.pdfIn PDF document text
    • https://dongciao.com/uploads/files/202109122231258652.pdfIn PDF document text
    • http://synowka.pl/galeria/file/27734479360.pdfIn PDF document text
    • http://burelomdo.com/ckfinder/userfiles/files/30336940567.pdfIn PDF document text
    • http://www.toptehnik.si/images/sajafowobenotizojopagiku.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/73a3ff35a8e038d6466b9b7f79880d95/72197466971.pdfIn PDF document text
    • http://pawsandtiaras.com/ckfinder/userfiles/files/zalisofupokojoso.pdfIn PDF document text
    • https://soi.icami.mx/ckfinder/userfiles/files/93285352350.pdfIn PDF document text
    • http://yourtruck.be/upload/ckeditor/file/wulebuwegi.pdfIn PDF document text
    • https://posetili.ru/userfiles/file/89645334222.pdfIn PDF document text
    • http://stihoplet.by/upload/editor/files/vupodabopamota.pdfIn PDF document text
    • https://warungmimpishio.com/contents/files/61538360400.pdfIn PDF document text
    • http://hoangduy.vn/vn/files/nudatenorimewudix.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=pokemon+platinum+randomizer+gbaPDF 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_off0000b646.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB646 10960 bytes
SHA-256: 6349bd85d7e6f6193fa374866aa35ba5f288fdfc4ee62b97d05c8665505262c2
font_01_sfnt_off0000cf3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF3C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e74e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE74E 17496 bytes
SHA-256: 7b9d0a2e91fc8ede171629868cd4410ff2c9c309c070f2062538ffe8b7e61e5f