Malicious PDF — malware analysis report

Static analysis result for SHA-256 871109c7552415dc…

MALICIOUS

PDF

68.6 KB Created: 2021-02-12 02:36:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 7e9f1b0bc0814bdaca413d57eaf15cdf SHA-1: 1be1b9cc70aa40198f577f6933de35ca5acc6bb3 SHA-256: 871109c7552415dccdbefb7228447fb0c2c12d07e4bdc20d19a67090a6c5da64
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://leonvi.ru/wix?keyword=smartboard+math+games+3rd+grade PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4486563/normal_601e4ca692872.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475872/normal_5fd846d7bdcf4.pdfIn PDF document text
    • https://semetipakes.weebly.com/uploads/1/3/0/7/130775831/favezukuwupuregefob.pdfIn PDF document text
    • http://vobigabifinu.22web.org/instagram_story_logo_template.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366308/normal_6016272deb7a1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370989/normal_5ff070e834250.pdfIn PDF document text
    • https://bopugokux.weebly.com/uploads/1/3/4/9/134901566/salemisufafumiwavuwo.pdfIn PDF document text
    • https://sizonijuza.weebly.com/uploads/1/3/4/5/134594560/149970.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/jalasilunaz/saguwidiju.pdfIn PDF document text
    • http://pudekixepubaz.epizy.com/mv_boomerang_wanna_one_planet_lagu.pdfIn PDF document text
    • https://s3.amazonaws.com/pubopelej/altus_dental_enrollment_form.pdfIn PDF document text
    • http://muxajetolalet.epizy.com/mindful_colouring_sheets_printable.pdfIn PDF document text
    • http://ridupokibi.epizy.com/car_air_conditioner_repair_cost_guide.pdfIn PDF document text
    • http://kibomurabinide.epizy.com/77251134104.pdfIn PDF document text
    • http://vusevupitiwo.rf.gd/popedixojonoborasol.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_off0000cf48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF48 5612 bytes
SHA-256: 7b46a0fd70867c0d54fbe3226f21bef800b2adf07085932c8ef79ddb5f7f4959
font_01_sfnt_off0000e22a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE22A 10240 bytes
SHA-256: e82944cc1e93d7730400f6fdc769679e507daf4fb75d68aac2757b06705bceb9