Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3e25ea4489ae322…

MALICIOUS

PDF

88.8 KB Created: 2021-03-16 20:32:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 98aeae905e916de4442e1d1c90018dac SHA-1: 3c50052d9ed7ee8d86ae8f7c5506039c478512cc SHA-256: d3e25ea4489ae3222f694f3a419ec495c9b0abd4f77fcb88c1d848f6d8989818
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with several pointing to known malicious redirector infrastructure and link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://crophysi.ru/strik?utm_term=infinix+note+8+price+in+ghana+telefonika In PDF document text
    • http://tuvivukaroj.mygamesonline.org/jidevupevunewofebuk.pdfIn PDF document text
    • https://xopilujipuwoka.weebly.com/uploads/1/3/4/8/134886601/junusesidoke.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479917/normal_5ff4129784695.pdfIn PDF document text
    • https://mimitokiwunas.weebly.com/uploads/1/3/4/0/134012498/907c5b4246.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372384/normal_602e25cca81d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370777/normal_5fd2ccda54d62.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386365/normal_5fd3bd32b3bf3.pdfIn PDF document text
    • http://vodizurulenega.mypressonline.com/kiwumizinokasuzokap.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485589/normal_5ff4f6dfcb485.pdfIn PDF document text
    • https://gemuxobupi.weebly.com/uploads/1/3/2/6/132682013/ed0278b.pdfIn PDF document text
    • http://tezijexipilimo.getenjoyment.net/bartlett_s_test_of_sphericity.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/nerugiraxura/ccma_arbitration_award_template.pdfIn PDF document text
    • https://s3.amazonaws.com/jimugivos/pirate_kings_mod_unlimited_spins.pdfIn PDF document text
    • https://s3.amazonaws.com/mufukep/fishing_guide_school_gi_bill.pdfIn PDF document text
    • https://s3.amazonaws.com/mokixetat/corporate_computer_security_4th_edition_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/zomuzigo/urine_culture_report_sterile_means.pdfIn PDF document text
    • https://s3.amazonaws.com/poresi/afdc_tanf_verification_form.pdfIn PDF document text
    • https://s3.amazonaws.com/gekojulog/26741681335.pdfIn PDF document text
    • https://s3.amazonaws.com/vabedafozo/eunectes_notaeus_caresheet.pdfIn PDF document text
    • https://s3.amazonaws.com/wujafivabipo/skype_for_business_for_windows_desktop.pdfIn PDF document text
    • https://s3.amazonaws.com/dejazuvorira/rosubelakofiwazegof.pdfIn PDF document text
    • https://s3.amazonaws.com/bisute/96495343206.pdfIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/lopotaxe.pdfIn PDF document text
    • https://s3.amazonaws.com/jusagi/welupupowigubabozifik.pdfIn PDF document text
    • http://fukuselumetu.myartsonline.com/aptitude_test.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fae9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAE9 5148 bytes
SHA-256: 56244fa07a8f945a30e7d850fe0f535831f625c50d0a79951158333e43563023
font_01_sfnt_off00010c5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C5A 6488 bytes
SHA-256: 60fe01d3dc5a757f6638964600e4fec896ebb4130ce7d2fbecdc2bab91938712
font_02_sfnt_off00011d6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D6D 12000 bytes
SHA-256: 56a11aa48552930add9d49747cd33c34e2b1b75ded399f38413a760f5d4e5360
font_03_sfnt_off0001462b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1462B 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e