Malicious PDF — malware analysis report

Static analysis result for SHA-256 44d1ef4e658251f4…

MALICIOUS

PDF

71.5 KB Created: 2021-02-15 15:56:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: e6bf7a8e191220205272f581eb6d715e SHA-1: 27d032bcd783b8999e6eb2c46e43edbd849b1792 SHA-256: 44d1ef4e658251f4cc270e433362d8661a9907f9dcc1f018ff9fe4c1d05b1915
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • 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://tiwofimobodes.weebly.com/uploads/1/3/4/0/134040820/jefevewipuwa.pdf.
  • 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://crophysi.ru/wix?keyword=clash+of+clans+account+giveaway+2020 In PDF document text
    • https://static.s123-cdn-static.com/uploads/4422914/normal_5ffe6e01d0e79.pdfIn PDF document text
    • https://tiwofimobodes.weebly.com/uploads/1/3/4/0/134040820/jefevewipuwa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377388/normal_5fd116d8eda4c.pdfIn PDF document text
    • https://xelipifexejup.weebly.com/uploads/1/3/4/8/134848770/01fab9dcf.pdfIn PDF document text
    • http://canonsburglake.org/nuwulemoredabupawegezfg0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467912/normal_600fa4fc95ec8.pdfIn PDF document text
    • https://jonilokakowoso.weebly.com/uploads/1/3/1/4/131453896/eba94.pdfIn PDF document text
    • https://jilukixewe.weebly.com/uploads/1/3/4/0/134042659/4337358.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484399/normal_5ff49f0741412.pdfIn PDF document text
    • http://acupofjacob.com/carbonyl_reactioncpmq0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425916/normal_6029056cdc844.pdfIn PDF document text
    • http://lakshmi-store.ru/mcculloch_chainsaw_3516_service_manualnttxv.pdfIn PDF document text
    • https://cdn.sqhk.co/wijelukifap/Chbhc9L/58301808306.pdfIn PDF document text
    • http://ru-order-687646765445.art/cyber_law_pptwr4r8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383704/normal_5fff790b418bc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393358/normal_5ff106ecaf7cc.pdfIn PDF document text
    • https://cdn.sqhk.co/vapezuwe/YL7lYij/rorajokozutafokuw.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/dojivewobasuval/lamotupak.pdfIn PDF document text
    • https://s3.amazonaws.com/zisulamisozoto/42870866859.pdfIn PDF document text
    • https://s3.amazonaws.com/zesotat/xeresewisetat.pdfIn PDF document text
    • https://s3.amazonaws.com/sowewazulejewi/59768573642.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_off0000dae1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAE1 5480 bytes
SHA-256: 8f1b6d7f5fee2a1364be476112c50c2f9020d8e1a3c4868cf26cdfbf34395395
font_01_sfnt_off0000eda3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA3 10152 bytes
SHA-256: f8469c6ccfbf8f877efdb353ec50130403d3944f77a09ebd1db12855bf68d6be

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