Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae4744a43c7c9e81…

MALICIOUS

PDF

72.7 KB Created: 2021-02-11 18:29:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: edbff29709e92fbcedc6bfb931444fd6 SHA-1: 2c4961e5a392681bab6f84e3c392f4cfd989b3f3 SHA-256: ae4744a43c7c9e811f972261f2e9713c8597c5cec7b12d2c6e9e07e3f4649cd7
184 Risk Score

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
  • 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 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.
  • 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://yafferge.ru/wix?keyword=happy+birthday+coach+funny In PDF document text
    • http://kieverts.xyz/linked_barabasiwbsjx.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382770/normal_5ff4d6c15320f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445104/normal_6001cb29b65a4.pdfIn PDF document text
    • http://clyb-wylcan3.space/82386106781pltpv.pdfIn PDF document text
    • https://cdn.sqhk.co/lukedivibeb/hdjfggA/hepatitis_b_symptoms_for_males.pdfIn PDF document text
    • https://cdn.sqhk.co/zimopiroxab/vgj4jcX/65603257178.pdfIn PDF document text
    • https://cdn.sqhk.co/jerivudofin/hBdEHdb/warlings_armageddon_mod_apk_hacked.pdfIn PDF document text
    • https://xuxukiworizep.weebly.com/uploads/1/3/4/7/134723333/lafozixi.pdfIn PDF document text
    • http://cartest.pro/92472869844t20x0.pdfIn PDF document text
    • http://skout.tech/famotalejosuwtet3.pdfIn PDF document text
    • https://wekowegalovu.weebly.com/uploads/1/3/4/6/134668649/vutejivewe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390681/normal_6003b6d884c18.pdfIn PDF document text
    • http://gramnews.xyz/81042952621bje0c.pdfIn PDF document text
    • http://rankingcoach-seo.com/vevilakodiluwo4zb1m.pdfIn PDF document text
    • https://judadumoxa.weebly.com/uploads/1/3/4/7/134718892/7ce847683cae5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387567/normal_5ff5ed7ec4731.pdfIn PDF document text
    • http://dkmz2.club/spatial_reasoning_testsdrwid.pdfIn PDF document text
    • http://salestore.pro/stickman_warfare_blood_strike_apke20gu.pdfIn PDF document text
    • http://asia.kiwi/beste_beauty_apps_androidfnxhw.pdfIn PDF document text
    • https://cdn.sqhk.co/remowiwa/htQ8hiG/photo_collage_editor_apk_free_download_for_android.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ripofosefalub.rf.gd/dejawadifikemunadisino.pdfIn PDF document text
    • http://favekagopu.epizy.com/29417407451.pdfIn PDF document text
    • http://rubuvajaroxe.epizy.com/baby_solid_food_guide_australia.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_off0000dfb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFB0 5236 bytes
SHA-256: ee8d96ee3421dd8937d029284c8348b588fde47d1e1a06ca3990994d3c8f4830
font_01_sfnt_off0000f17c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF17C 10656 bytes
SHA-256: db6a113fb8579a6e057c5b293f4b30467311c7dae981a3afc7935e9ce9a3b87d