Malicious PDF — malware analysis report

Static analysis result for SHA-256 df4ad5cd2958bc1f…

MALICIOUS

PDF

94.2 KB Created: 2021-03-15 03:52:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 1da401c481d0b4fedfdf48fb16bab64b SHA-1: f4c14528027f7fb54e9e97996486ffaa9a3e2174 SHA-256: df4ad5cd2958bc1f5972fb06ca2845f14460a9a205932a580458817c5ed85b5f
164 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. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 6

  • 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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/strik?utm_term=divergent+3+dual+audio+480p+download PDF link annotation
    • https://bunepefetupudir.weebly.com/uploads/1/3/2/7/132741430/jujudipetapolu_pomelikeja.pdfIn PDF document text
    • https://puduwuxibipufu.weebly.com/uploads/1/3/5/9/135966859/ee8b0c7fd8ada39.pdfIn PDF document text
    • https://lifexego.weebly.com/uploads/1/3/0/8/130874678/xeligizogamepib.pdfIn PDF document text
    • https://labufixurugon.weebly.com/uploads/1/3/4/8/134873424/82282297b0160f.pdfIn PDF document text
    • https://vepegusekukoj.weebly.com/uploads/1/3/4/4/134470637/lesala.pdfIn PDF document text
    • https://fipoxojumudex.weebly.com/uploads/1/3/4/6/134649093/1a89480.pdfIn PDF document text
    • https://wopopodixela.weebly.com/uploads/1/3/0/9/130969383/xejunomezewov-bukut-sepogijefolom-xilome.pdfIn PDF document text
    • https://nedetuvozuwe.weebly.com/uploads/1/3/4/6/134699612/tekivuzelij.pdfIn PDF document text
    • https://bilokomomaxin.weebly.com/uploads/1/3/5/3/135397692/d26dcc7f3.pdfIn PDF document text
    • https://senekidus.weebly.com/uploads/1/3/2/7/132740533/ralemebutudadip.pdfIn PDF document text
    • https://jumuwaxenu.weebly.com/uploads/1/3/1/4/131406560/vagotaxagafojetexo.pdfIn PDF document text
    • https://pubedazemel.weebly.com/uploads/1/3/4/8/134870130/dulinimowofawa.pdfIn PDF document text
    • https://waxukazo.weebly.com/uploads/1/3/1/0/131071095/fupom_fupurogu_tufebe_fafofetiwopuxi.pdfIn PDF document text
    • https://gononazenikemad.weebly.com/uploads/1/3/4/4/134482012/lekasup-ridefepomixaka.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/putelekireza/tejesotenakaxalewoz.pdfIn PDF document text
    • https://s3.amazonaws.com/sukobogixe/a_arte_de_amar_ovidio_resumo.pdfIn PDF document text
    • https://s3.amazonaws.com/pafexegud/33000374319.pdfIn PDF document text
    • https://s3.amazonaws.com/juvosi/gratitude_guided_meditation_script.pdfIn PDF document text
    • https://s3.amazonaws.com/vibuvomomuv/x99_cpu_support_list.pdfIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/kedakow.pdfIn PDF document text
    • https://s3.amazonaws.com/dekogamik/ratop.pdfIn PDF document text
    • https://s3.amazonaws.com/roxawo/vcenter_server_6._5_update_3.pdfIn PDF document text
    • https://s3.amazonaws.com/nerugiraxura/latitude_and_longitude_worksheets_for_grade_4.pdfIn PDF document text
    • https://s3.amazonaws.com/pululusodogi/what_is_pre_op_nursing_like.pdfIn PDF document text
    • https://s3.amazonaws.com/miledu/application_cutover_plan_template.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF63 6744 bytes
SHA-256: 0eac1552a6a0cc8d6d43e14f5c157d052ff2bf21460314f67a2c213e0a454e63
font_01_sfnt_off0001104a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1104A 5688 bytes
SHA-256: d490bd63af977a2de79dd68dc052818cb024343707755e4e4bb695fd901f7733
font_02_sfnt_off000123d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123D2 1888 bytes
SHA-256: 5486c1bd0abeaa92abd36d1bee4e961ffa0c4a35e07252aef31d76b6fa745a29
font_03_sfnt_off00012d07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D07 11576 bytes
SHA-256: d5092faf2faacd9cd9c1e3e203eef86e29be52def974d956541ce5784a323cfa
font_04_sfnt_off0001548f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1548F 16216 bytes
SHA-256: 534963ce009af38ddfa0ffea30875a459d845c398a690ef7d0f0f55f8213207a

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