Malicious PDF — malware analysis report

Static analysis result for SHA-256 37a6715d25a474e0…

MALICIOUS

PDF

68.9 KB Created: 2021-02-25 10:18:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: b9fcb35da92beaf19779bd3bb053ba3c SHA-1: bbe8c4ed9923048685b7f314ee55a93c068919e5 SHA-256: 37a6715d25a474e0c421eefa41afe4d4ff5f008fb06630cd2a3185f43fe037cd
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://druttle.ru/award?keyword=evan+moor+daily+math+practice+grade+5+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4382782/normal_5fdd9b505b69c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421473/normal_602f828ed706a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385614/normal_5fe63cb965aa6.pdfIn PDF document text
    • http://ihsteam.ru/relative_clauses_exercises_worksheetmm02m.pdfIn PDF document text
    • http://feedbacrnz.space/chapter_2_cumulative_review_algebra_1_answers48f5w.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470029/normal_60265e84d3081.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388835/normal_6021f52bbeb66.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502188/normal_602e34f2de33f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375087/normal_600e047c45c38.pdfIn PDF document text
    • http://omerkatanalp.com/kexinigk5jo5.pdfIn PDF document text
    • http://obsluzhivanie-kompyuterov.moscow/teracopy_pro_activation_key4sxpc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kijemuf.epizy.com/homelite_bandit_sx_135_trimmer_manual.pdfIn PDF document text
    • http://tewidunutazi.rf.gd/beelink_gt_king_android_tv_box.pdfIn PDF document text
    • http://xodemomawul.epizy.com/6474910643.pdfIn PDF document text
    • https://s3.amazonaws.com/sitozi/muzod.pdfIn PDF document text
    • http://bekogufepe.rf.gd/free_template_cv_menarik_word.pdfIn PDF document text
    • http://jiguluvosasibun.epizy.com/lavapo.pdfIn PDF document text
    • https://s3.amazonaws.com/fotepopunaj/my_talking_angela_android_gameplay.pdfIn PDF document text
    • https://s3.amazonaws.com/pirosisob/culture_fair_iq_test_answers.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_off0000d1b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1B5 5632 bytes
SHA-256: 9001f1e7bc85259f4789f902cca06f763f028d96576605f80340a9c47314f130
font_01_sfnt_off0000e4cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4CD 9724 bytes
SHA-256: 8e9163aac36191f6aaf743c294866527f809b2f46be357ed35ffd4f72a43453f