Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1ec0b1b6e9a015e…

MALICIOUS

PDF

67.5 KB Created: 2021-03-06 10:49:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 758eb014ac25e4ecd2dabab982559e1a SHA-1: 024aebbfbb41a696d57bb2a6117a0822c035c8c3 SHA-256: b1ec0b1b6e9a015e3d01d305e3bc0b48458ea019512d607bf3d2de705ae897dc
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including brand-impersonation credential phishing and a link farm. The presence of external URIs and a high ML score indicate a strong likelihood of malicious intent. The primary lure appears to be a phishing attempt impersonating Chase bank, directing users to a redirector URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://dilisuri.weebly.com/uploads/1/3/5/3/135326113/xosoruxe_xijarufizexibo_tokolulufejina.pdf.
  • 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://seumenha.ru/wix?keyword=radian+measure+practice+worksheet PDF link annotation
    • http://kifopelidito.mypressonline.com/how_to_manage_stressors.pdfIn PDF document text
    • https://dilisuri.weebly.com/uploads/1/3/5/3/135326113/xosoruxe_xijarufizexibo_tokolulufejina.pdfIn PDF document text
    • http://gexomafe.mypressonline.com/82040392234.pdfIn PDF document text
    • http://xexapitanegis.getenjoyment.net/present_perfect_subjunctive_spanish_exercises.pdfIn PDF document text
    • http://nakodinita.scienceontheweb.net/92216060029.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464720/normal_5ffae47bde1bb.pdfIn PDF document text
    • https://jajaleregonu.weebly.com/uploads/1/3/4/2/134235513/xominizoz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448110/normal_602ce05e96998.pdfIn PDF document text
    • https://kotageluvo.weebly.com/uploads/1/3/4/6/134652464/576764.pdfIn PDF document text
    • http://ginupedarokuxu.getenjoyment.net/oracle_12c_end_of_life_extended_support.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490123/normal_5fd7cfe71d6a6.pdfIn PDF document text
    • http://pebonemariv.mypressonline.com/how_do_you_write_an_opening_statement_for_arbitration.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403806/normal_5fc9d4e13d35f.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/mogedozara/behringer_x32_manual_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jevedijadiki/technical_design_report_structure.pdfIn PDF document text
    • https://s3.amazonaws.com/tifuwuw/journey_collector_s_edition_ps4_trophy_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/wegemebufojafak/16338722136.pdfIn PDF document text
    • https://s3.amazonaws.com/dikobepibelun/taotao_atv_parts_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/susonanezaj/how_do_you_change_the_shutter_speed_on_a_nikon_d40.pdfIn PDF document text
    • https://s3.amazonaws.com/kosipefojaw/takifetopam.pdfIn PDF document text
    • https://s3.amazonaws.com/fapaga/70685646534.pdfIn PDF document text
    • https://s3.amazonaws.com/xafaxotaful/sojonazugurudawupij.pdfIn PDF document text
    • http://manosotidokef.myartsonline.com/garmin_gps_76_user_manual.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_off0000cb34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB34 5444 bytes
SHA-256: 143920c484bb8c272ee35e2778a778cb71f51c1e98795225fc8ff1bb9c4051d6
font_01_sfnt_off0000dda2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDA2 10308 bytes
SHA-256: 8f2524b8a5332d3ce1dcb669fc7101237ad44865ca5afee257af7d346233da4c

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