Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6b6ca36bbef046f…

MALICIOUS

PDF

100.9 KB Created: 2021-03-18 14:15:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 64eb0f8b4db0073ba89f03a0a4a0e932 SHA-1: 53cf5fb0446b6e8e63acd880ee97e7a3756428a5 SHA-256: b6b6ca36bbef046f44ba53c821119689c1ae685a907c607e5e64ad74612a527c
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. 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 0.9993

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://crophysi.ru/aws?utm_term=stock+market+wizards+by+jack+d.+schwager+1 PDF link annotation
    • http://rozewevojalel.sportsontheweb.net/falinupululuxabevu.pdfIn PDF document text
    • https://cdn.sqhk.co/duxisabaza/PcigNgj/symmetric_matrix_example.pdfIn PDF document text
    • http://fepaporipevari.mypressonline.com/8127349543.pdfIn PDF document text
    • http://sixesijilolun.mywebcommunity.org/ansul_fire_suppression_system_price.pdfIn PDF document text
    • https://cdn.sqhk.co/sotatixorawi/gjp0Bca/gumibutusibiti.pdfIn PDF document text
    • http://xogunajeraxuda.mywebcommunity.org/25533495871.pdfIn PDF document text
    • https://cdn.sqhk.co/boketumejipa/kS1liec/idle_landmark_tycoon_mod_apk_download.pdfIn PDF document text
    • http://kutejovanog.getenjoyment.net/47136232115.pdfIn PDF document text
    • http://fulokixowo.scienceontheweb.net/how_to_start_an_outboard_motor_without_a_key.pdfIn PDF document text
    • https://cdn.sqhk.co/fowurona/hfghw1D/78312824443.pdfIn PDF document text
    • http://newipufisatag.scienceontheweb.net/mevuvude.pdfIn PDF document text
    • http://xokapik.mywebcommunity.org/blood_relation_questions_and_answers.pdfIn PDF document text
    • http://kevebofuru.medianewsonline.com/xodoban.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9534cc33-30dc-483d-bed2-8d5691710d48.filesusr.com/ugd/3835dd_7805a6015cbb4c1e8a1d69ddaef034a2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d92b3ea7-8004-4e99-bc99-ad00eaa5799e/m5a78l-m_lx_plus_motherboard.pdfIn PDF document text
    • http://fuguzametekobo.myartsonline.com/ba_1st_year_book.pdfIn PDF document text
    • http://widifusi.myartsonline.com/snapper_28_hi_vac_belt_replacement.pdfIn PDF document text
    • http://xemunebo.atwebpages.com/case_study_executive_summary_sample.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fabcc41-8b27-4cac-b2e2-0dcd22de768d/40049033940.pdfIn PDF document text
    • https://327bbe42-9aa5-4ca0-80e5-6c9857058a26.filesusr.com/ugd/2b870b_5c87b31867ae467f9d187579a6e230c1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b157435-a218-4a64-a665-04a9c1220dc4/foxit_advanced_editor_free_download_full_version_with_crack.pdfIn PDF document text
    • http://jujobope.atwebpages.com/76116910010.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3f9b383-f4f2-499e-81f4-d775316efa76/balujatalumunodinizekaxo.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_off00014889.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14889 6032 bytes
SHA-256: 753909bf988e59c9d86d310488f030c38ca523b3ee39e5c57c4201ea20b219cd
font_01_sfnt_off00015d15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D15 11732 bytes
SHA-256: d950140cbb55fc327ee0b72109fcb85bdb03e82c9526df1ef55bac0a54de7b15