Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce583f5c80eaaf70…

MALICIOUS

PDF

74.4 KB Created: 2021-03-02 09:57:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: c3a9e29bd8ff3f3b581f99a3440c96ed SHA-1: 8c6340766a8e963d8dec3bdc086ddb7d0976b236 SHA-256: ce583f5c80eaaf70fbf0e6e13424478dcb4668accba5b9f3b88482e0eeb50ce3
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an urgency-based lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://jottigo.ru/wix?keyword=samsung+wf42h5200aw%252Fa2+service+manual PDF link annotation
    • http://meetly.space/wenelixazun790vs.pdfIn PDF document text
    • http://bumasujofoj.getenjoyment.net/lasejedoxibub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447270/normal_603a24648c551.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424981/normal_5fc7af44776a7.pdfIn PDF document text
    • http://opencabinets.xyz/what_is_the_central_message_of_the_gift_of_the_magi5afu3.pdfIn PDF document text
    • http://ruguwafe.scienceontheweb.net/how_to_ignore_a_guy_on_social_media.pdfIn PDF document text
    • http://wulutano.mywebcommunity.org/kupeguwum.pdfIn PDF document text
    • http://milky-rp.space/best_book_on_asian_historyk2bbi.pdfIn PDF document text
    • http://bidizujimon.getenjoyment.net/figukelanajod.pdfIn PDF document text
    • https://kelonefak.weebly.com/uploads/1/3/2/6/132683111/vulef.pdfIn PDF document text
    • http://rowexusaje.mypressonline.com/hp_laserjet_pro_400_m451dn_cartridges.pdfIn PDF document text
    • http://baliferifopiz.mypressonline.com/is_night_manager_on_netflix_uk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375515/normal_5fd18b055d51d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rewuwuja.onlinewebshop.net/how_to_clean_my_bissell_spotbot.pdfIn PDF document text
    • http://kivozusemu.atwebpages.com/28148886864.pdfIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4B8 6072 bytes
SHA-256: 46a3a4984c922565db08a255045585f925ad1dca71f7e502346f3b304ce737a8
font_01_sfnt_off0000f969.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF969 10152 bytes
SHA-256: a1abec3bbed38ca987a3658c12c17fd5351aaee1a495a0da9b874ef7cf07a01c